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Dependence on harvest date and yielding of marjoram (Origanum majorana L.) cv. 'Miraz' cultivated from a seedling

100%

Zawislak G.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2008

|

tom 07

|

nr 2

Studies were carried out in 2003–2005. The dependence between harvest date and yielding of marjoram (cv. ‘Miraż’) was investigated. The plantation was set from a seedling produced in a greenhouse. Plants were set in 30 × 40 cm spacing. Two weeks after setting, part of plants were cut and shoot tips with the first leaf pair were removed. The herb harvest was made twice: in the middle of July and at the end of August. Ground herb was subjected to determinations of essential oils. Qualitative and quantitative composition of marjoram oil was determined by means of gas chromatography coupled with mass spectrometry (GC/MS). The harvest date had significant influence on marjoram yielding. Higher yield of a fresh herb was achieved at the end of August (44.6 dt.ha⁻¹) than in the middle of July (30.5 dt.ha⁻¹). The essential oil content in the herb of marjoram cv. ‘Miraż’ was 1.7–2.2%. Trans-sabinene hydrate, terpinen-4-ol, and sabinene dominated in marjoram essential oil.

2

The content of microelements in grain of six maize cultivars depending on the harvest date

100%

Szymanska G., Sulewska H., Panasiewicz K.

Zeszyty Problemowe Postępów Nauk Rolniczych

|

2009

|

tom 541

|

nr 2

Maize has very homogenous grain which is considered to be the best animal feed in the world, characterized by the highest availability of energy and other nutrient elements. However, the conditions of the habitat, species characteristics and caryopsis structure can modify the contents of mineral elements in grain. The literature lacks reports identifying the influence of the harvest date and cultivar on the microelement content in maize grain. The experiments were conducted between the years 2003-2005, in the fields of the Swadzim Research and Didactic Institute, belonging to the Department of Soil and Plant Cultivation of Poznań University of Life Sciences. Their aim was to determine changes in the content of selected microelements in grain of six maize cultivars differing in the lenght of vegetation time and type of grain due to delays in the harvest date. The experiment was bifactor in 4 field repetitions. The first order factor was the date of harvest: 1st - the „black spot” stadium in ripening caryopsis; 2nd - 6th - further harvests performed fortnightly. The second order factor was the cultivar; the selected cultivars differed in the terms of earliness and type of grain. „Dent” cultivars were PR39T68 (FAO 200), Blask (FAO 240-250), Clarica (FAO 270). „Flint” cultivars were Oleńka (FAO 200), Matilda (FAO 240), Anjou 258 (FAO 260-270). On average the highest content of Cu and Fe was recorded in grain harvested six weeks after the „black spot” phase, and Mn and Zn in grain harvested four weeks after this phase. Among the tested cultivars the highest content of Cu and Fe was recorded for the medium early cultivar Blask, and Mn and Zn for the early cultivar Oleńka.

3

Changes in carbohydrate content in mixtures of field pea and spring triticale determining the quality of green fodder

100%

Gorski R., Plaza A., Rudzinski R.

Agronomy Science

|

2022

|

tom 77

|

nr 1

4

Effect of the nitrogen fertilization and harvest date on the seed sowing value in pea

100%

Helios W., Kotecki A.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

|

2005

|

tom 08

|

nr 4

In a three-factor experiment set up as a ‘split-plot’, at the RZD Pawłowice, in the vicinity of Wrocław, the following were investigated: the effect of: I – pea cultivar: Agra – semi-leafless and ‘Rola’, traditional – bipinnate leaves; II – nitrogen fertilization: 0, 30, 60 kg·ha-1; III – harvest date: green, yellow and full maturity, on the development of the seed sowing value. The cultivars researched did not differ in their germinative energy and germinability, while 1000 seed weight and leachate electroconductivity were higher in ‘Rola’ than in ‘Agra’. There was shown a positive effect of nitrogen fertilization at the dose of 30 kg·ha-1 on 1000 seed weight, while the other parameters of the sowing value did not depend on the sowing value of this factor. As ripening progressed, until full maturity, there was recorded a significant increase in 1000 seed weight, germinative energy and germinability and in vigor measured with the leachate electroconductivity. A positive correlation between 1000 seed weight and germinative energy and germinability of seeds and a negative correlation between the germinative energy, germinability, 1000 seed weight and the leachate electroconductivity after 12 and after 24 hours.

5

Capsaicinoids in hot pepper depending on fruit maturity stage and harvest date

84%

Buczkowska H., Dyduch J., Najda A.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2013

|

tom 12

|

nr 6

The pharmacological and culinary usefulness of hot pepper fruits is determined, among others, by the content of capsaicinoids that give hot peppers a pungent burning taste. The content of these compounds in hot pepper is primarily determined by the genetic traits of a cultivar and is modified by various factors: weather conditions during the growing season, fertilization, harvest time, and fruit maturity stage. The aim of the present study was to evaluate the effect of fruit maturity stage: green fruits, fruits turning colour as well as physiologically mature fruits (red), and fruit harvest date: the first and third decade of September, on the content of capsaicinoids in four hot pepper cultivars: ‘Cyklon’, ‘Orkan’, ‘Rokita’, and ‘Bronowicka Ostra’. In this study, which was carried out in 2005 and 2006, the content of capsaicinoids (capsaicin and dihydrocapsaicin) was measured by HPLC. The highest amount of capsaicinoids was obtained in the fruits of hot pepper that were harvested at the initial stage of maturity – in green fruits (on average 309 mg·kg⁻¹), compared to fruits turning red (258) and red fruits (250 mg·kg⁻¹). Peppers selected in the third decade of September contained more capsaicinoids (on average 301 mg·kg⁻¹) than those harvested in the first decade of this month (243 mg·kg⁻¹). Fruits of the evaluated cultivars differed in capsaicinoids content; on average it ranged from 212 (‘Cyklon’) to 326 mg·kg⁻¹ (‘Bronowicka Ostra’). In fruits of all the quantitative ratio of capsaicin to dihydrocapsaicin was at a similar level, ranging between 11.9 and 12.9. The capsaicinoids content in fruits of the investigated cultivars differed between years 2005 (302) and 2006 (243 mg·kg⁻¹).

6

Effect of the date and harvest method on the yield and quality of milk thistle [Silybum marianum L. Gaertn.] cultivated on light soil

84%

Sadowska K., Andrzejewska J.

Herba Polonica

|

2009

|

tom 55

|

nr 3

47-54

Over 2004–2006 at the Agricultural Experiment Station at Mochełek (University of Technology and Life Sciences in Bydgoszcz), there was evaluated the effect of harvest methods and dates on the yield and quality of fruit (achene) of milk thistle cultivated on light soil. A two-stage harvest was applied when 30% of inflorescences had pappus and one-stage harvest when 30 or 50% of inflorescences developed the pappus. The highest fruit yield (1.43 t. ha-1) was recorded from the one-stage harvest when 30% of the flower heads were ripe. A delay in the one-stage harvest resulted in an increase in the content of silymarin (from 2.5 to 2.7%) but in a decrease in the fruit yield to 1.17 t. ha-1 that was comparable with the two-stage harvest (1.09 t. ha-1). At an earlier ripeness stage (30% of inflorescences with pappus) the content of silymarin was negatively correlated with the share of the pericarp in the achene weight as well as with the achene yield. The harvest dates and methods resulted in differences in the silymarin yield from 27.3 (two-stage harvest) to 35.6 kg. ha-1 (earlier one-stage harvest).

7

Effect of cultivar and harvest date of kale [Brassica oleracea L. var. acephala] on content of nitrogen compounds

84%

Korus A., Lisiewska Z.

Polish Journal of Environmental Studies

|

2009

|

tom 18

|

nr 2

235-241

The level of total nitrogen, protein nitrogen, nitrates (NO₃⁻) and nitrites (NO₂⁻) was measured in the leaves of kale of the cultivars Winterbor F₁, Redbor F₁ and Średnio Wysoki Zielony Kędzierzawy. The investigation was carried out in two successive years, the raw material being harvested three times each year, i.e. 10, 14 and 18 weeks after planting seedlings in the field. Depending on the year of the investigation, the cultivar and the date of harvest, the content found in 100 g fresh matter of kale was: 0.54-0.74 g total nitrogen and 0.46-0.50 g protein nitrogen; in 1000 g the content of nitrates (NO₃⁻) was 248-2810 mg and of nitrites (NO₂⁻) 0.14-0.95 mg. In both years the highest content of total nitrogen was found in leaves of Średnio Wysoki Zielony Kędzierzawy and of protein nitrogen in Winterbor F₁. The cultivar Redbor F₁ was characterized by the highest content of nitrates and nitrites. Comparing material from the three harvest dates, average values for the year and cultivar showed that the second harvest contained 9% more total nitrogen and 4% more protein nitrogen than the first, while the third harvest contained, respectively, 17% and 8% more than the first. Nitrate content fell by 67% and 83%, respectively, and nitrite increased by 5% (but later was reduced by 46%). Nitrate and nitrite are regulated in spinach and lettuce and for this reason understanding the accumulation of these compounds is critical if regulations are developed for kale.

8

The influence of harvest date on fruit quality of several cultivars of blue honeysuckle berries

84%

Ochmian I., Smolik M., Dobrowolska A., Rozwarski R., Kozos K., Chelpinski P., Ostrowska K.

Electronic Journal of Polish Agricultural Universities. Series: Horticulture

|

2013

|

tom 16

|

nr 1

9

Apple skin colour changes during harvest as an indicator of maturity

84%

Lysiak G., Kurlus R., Zydlik Z., Walkowiak-Tomczak D.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2014

|

tom 13

|

nr 3

The CIELab colour system is used to evaluate food colours. Its advantage is that the base skin colour of bicoloured apples can be measured on the same fruit before and on the optimum harvest date. Additionally, it makes it possible to take many measurements within a short time. The changes of skin colour (yellowing) are caused by chlorophyll degradation. During fruit development and maturation chlorophyll breakdown is observed, which results in decreasing intensity of green coloration. The aim of the fiveyear study was to evaluate a fast and non-destructive method of determining the optimum harvest date of apples intended for long storage based on changes observed in the base skin colour. Apples of ‘Ligol’ and ‘Jonagored’ cultivars were collected every 4–5 days starting some weeks before the estimated OHD. On the last four or five sampling dates in all years of the study, apples were collected for cold storage. The storability of apples was evaluated after the same number of days of storage respectively to their harvest date. Storage efficiency was evaluated based on judgment that involved sensoric tests and checking of the incidence of diseases and disorders in apples, as well as on measurement of fruit mass loss and internal qualities (firmness, TSS, TA). From among the evaluated colour indicators L*, a*, b*, Hueab angle and chroma, changes in the base colour were best illustrated by the a* coordinate value and the Hueab angle value. Based on the evaluation of the quality of apples after storage, it can be stated that the apples had the best quality when the a* coordinate during harvest ranged between -13.5 and -15.5 for ‘Ligol’ and between -4.9 and -5.7 for ‘Jonagored’. The Hueab angle assumed a value between 107 and 109 for ‘Ligol’ and between 98 and 99 for ‘Jonagored’ during the optimum harvest date. Therefore, the a* coordinate and the Hueab angle can be used as indicators of harvest maturity.

10

Influence of sweet corn harvest date on sweet corn kernel cutting resistance

84%

Szymanek M.

Teka Komisji Motoryzacji i Energetyki Rolnictwa

|

2008

|

tom 08a

11

Evaluation of new leek cultivars for early cropping

84%

Kolota E., Adamczewska-Sowinska K.

Vegetable Crops Research Bulletin

|

2001

|

tom 54

|

nr 1

12

Content of carotenoids and chlorophyll pigments in kale [Brassica oleracea L. var. Acephala] depending on the cultivar and the harvest date

67%

Korus A., Kmiecik W.

Electronic Journal of Polish Agricultural Universities. Series Food Science and Technology

|

2007

|

tom 10

|

nr 1

13

Influence of harvest date and storage conditions on the changes of selected qualitative conditions of 'Concorde' pears

67%

Blaszczyk J.

Journal of Fruit and Ornamental Plant Research

|

2010

|

tom 18

|

nr 2

211-221

The study was carried out during the two storage seasons of 2008/2009 and 2009/2010. The subject of this study was the checking of the influence of the harvest dates being 4-days apart, and checking of the different storage conditions (CA 0.8% CO2:2% O2, CA 2% CO2:2% O2, CA 3% CO2:3% O2 and NA - normal atmosphere) on the selected quality parameters of 'Concorde' pears. The pears were first stored for 150 days in 0-0.5 oC. Once the fruit was out of the storage it was stored in simulated shelf-life conditions for an additional 7 days at a temperature of 17 oC. An evaluation of pear quality was conducted after each harvest date, after taking them out of the cold storage and after simulated shelf-life. Flesh firmness, soluble solids content and titratable acidity were determined, and pear health was evaluated. Harvest date had a significant impact on the maturity of fruit, and values of the investigated quality parameters of pears, during the harvest. During the subsequent harvests, the value of the starch index and soluble solids content in pears increased, whereas Streif's maturity index, flesh firmness and titratable acidity decreased. Harvest date and storage conditions also had a significant influence on the investigated qualitative attributes of pears determined after storage, and the simulated shelf-life period. Pears stored in controlled atmosphere conditions were firmer and had higher titratable acidity than fruit stored in common cold storage. Delay in the harvest date resulted in fast softening of fruit, significant reduction of titratable acidity, and higher susceptibility to putrefaction caused most of all by the gloeosporium rot. A serious problem observed during long term storage of 'Concorde' pears was sensitivity to flesh damage caused by CO2, and high susceptibility to senescent scald.

14

Effect of n fertilization and the harvest date on the accumulation of dry weight, organic and mineral nutrients in plants of selected pea cultivars

67%

Helios W., Kotecki A.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

|

2006

|

tom 09

|

nr 4

15

Evaluation of the yield and biological value of tarragon (Artemisia dracunculus L.) in the bunch harvest cultivation

67%

Zawislak G., Nurzynska-Wierdak R.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2014

|

tom 13

|

nr 4

The biological value of fresh and dried spice material is strongly influenced by climatic and agronomic conditions as well as by genetic and ontogenetic factors. In the available scientific literature, few publications present the problems of growing herbal plants for direct consumption and discuss the biological value of fresh herbal material. Therefore, the aim of the present study was to evaluate the yield and quality of tarragon herb grown for bunching depending on plant density (20 × 20 cm and 30 × 30 cm) and harvest date (beginning of July and beginning of September). This study was conducted during the period 2010–2012 at the Experimental Station of the Department of Vegetable Crops and Medicinal Plants, University of Life Sciences in Lublin, in south-east region of Poland (51º14’N 22º34’E). In fresh plant material, the contents of L-ascorbic acid, chlorophyll, carotenoids and essential oil were determined, while the contents of essential oil, tannins and flavonoids were determined in leaf herbage. The yield of tarragon herb grown for bunching was dependent on the plant density and harvest date as well as their interaction. Plants grown at lower density and harvested during the early summer period were characterized by better yield parameters compared to the other treatments. Tarragon herb harvested at the beginning of July was characterized by higher concentrations of L-ascorbic acid, chlorophyll a, b and a + b, flavonoids and essential oil as well as a lower content of tannins than the plant material harvested at the beginning of September. The carotenoid content in tarragon herb was not dependent on the factors studied, with their significant interaction. In growing tarragon for bunching, lower plant density can be recommended, since it contributes to high herb and essential oil yields. The beginning of July proved to be a more favourable time for harvesting tarragon grown for bunching than the beginning of September due to the quantity and biological value of tarragon yield and essential oil yield.

16

The effect of temperature on the broccoli yield and length of the period from head initiation to harvest

67%

Kaluzewicz A., Krzesinski W., Knaflewski M., Lisiecka J., Spizewski T., Fraszczak B.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2010

|

tom 09

|

nr 3

Temperature is a factor which strongly affects the yield and broccoli head quality. Temperature determines the date of head initiation and thus affect the length of vegetation period. An experiment the aim of which was to assess the impact of temperature on the yield and the length of the period from the broccoli head initiation until the beginning and end of harvest as well as the length of the harvest period was carried out in years 1997–1999. The seedlings of cv. Fiesta were planted in April, May, June and July. The phase of head initiation was determined on the basis of analyses of microscopic preparations. The highest total yield was obtained from May and June planting dates, the highest marketable yield was recorded in the case of the May date planting. A higher correlation was found between the sum of temperature and mean daily air temperature in the period from the initiation to the beginning and end of harvest and mean weight of marketable heads than between temperature and the total yield. The highest correlation was determined between the mean air temperature and the number of days from the head initiation to the last harvest.

17

Effects of tegument, endosperm, cold treatment and harvest date on germination of wild olive

67%

Hannahi H., Marzouk S., El Gazzah M.

Dendrobiology

|

2011

|

tom 65

Wildolive seeds (Olea europaea L. var. sylvestris), calledoleaster do not germinate when placedunder favourable conditions. In a series of experiments the effects of the harvest date, the endosperm, the tegument, andthe coldtreatment were evaluatedon germination of seeds andembryos. The germination percentage of embryos and seeds harvested at different harvest dates increased during October month, these percentages decreased during November month, whereas no seeds and embryos harvested on the middle of December germinated. Embryo germinability was always higher than seed germinability, and this may be due to an inhibiting effect of the teguments and the endosperm on seed germination. Such dormancy, which gradually increased during maturation, could reside mainly in the endosperm and partly within the embryo. The cold treatment at 4°C for four to thirteen days increased seed and embryo germinability, whereas lengthening time at this temperature showeda negative effect on seedgermination. The germination of seeds andembryos from six wildolive trees was also examinedby recording the germination percentage andminimum imbibition time (Tmi).

18

Polyphenolic compounds and bioelements in fruits of eastern teaberry [Gaultheria procumbens L.] harvested in different fruit maturity phases

67%

Pliszka B., Wazbinska J., Huszcza-Ciolkowska G.

Journal of Elementology

|

2009

|

tom 14

|

nr 2

341-348

Eastern teaberry (Gaultheria procumbens L.) is known for its high content of essential oils in leaves and fruits, which are used in the pharmaceutical, food and cosmetics industries. Recently, teaberries have been attracting more interest owing to their content of polyphenolic compounds. The purpose of our study has been to determine the content of polyphenolic compounds (anthocyanins and total phenols) as well as their antioxidative activity and the concentration of several bioelements (Ca, Mg, Fe and Zn) in extracts from fruits of Eastern teaberry harvested in three different fruit maturity stages. The content of polyphenolic compounds depended on the harvest date. The highest level of these compounds was found in extracts from teaberries collected in the full maturity phase. All teaberry extracts, independently of the harvest date, demonstrated high antioxidative activity. Among the bioelements determined, teaberry extracts contained more calcium than magnesium and more iron than zinc. The content of such bioelements as Mg, Fe and Zn (in contrast to Ca) found in teaberry extracts did not depend on the harvest date.

19

Cropping evaluation of white horehound [Marrubium vulgare L.], grown from sowing and seeding

67%

Zawislak G.

Herba Polonica

|

2009

|

tom 55

|

nr 3

63-68

The studies were conducted in the years 2004–2008. The available Polish and foreign literature does not devote much attention to the problem of growing white horehound. The cropping of white horehound grown from sowing and seedling was assessed in the experiment, depending on the term when the plantation was established, harvest date and age of the plants. Air dry herb was analyzed in the laboratory, where the essential oil content was determined. On the basis of the studies, it was revealed that seed sowing date and herb harvest term affect white horehound plant cropping. Differences were also found in cropping between plants from one-year and two-year plantation

20

Harvest date determined by different methods of starch index readings and texture changes during apple storage

67%

Guz T.

Teka Komisji Motoryzacji i Energetyki Rolnictwa

|

2010

|

tom 10

Ograniczanie wyników

Dependence on harvest date and yielding of marjoram (Origanum majorana L.) cv. 'Miraz' cultivated from a seedling

The content of microelements in grain of six maize cultivars depending on the harvest date

Changes in carbohydrate content in mixtures of field pea and spring triticale determining the quality of green fodder

Effect of the nitrogen fertilization and harvest date on the seed sowing value in pea

Capsaicinoids in hot pepper depending on fruit maturity stage and harvest date

Effect of the date and harvest method on the yield and quality of milk thistle [Silybum marianum L. Gaertn.] cultivated on light soil

Effect of cultivar and harvest date of kale [Brassica oleracea L. var. acephala] on content of nitrogen compounds

The influence of harvest date on fruit quality of several cultivars of blue honeysuckle berries

Apple skin colour changes during harvest as an indicator of maturity

Influence of sweet corn harvest date on sweet corn kernel cutting resistance

Evaluation of new leek cultivars for early cropping

Content of carotenoids and chlorophyll pigments in kale [Brassica oleracea L. var. Acephala] depending on the cultivar and the harvest date

Influence of harvest date and storage conditions on the changes of selected qualitative conditions of 'Concorde' pears

Effect of n fertilization and the harvest date on the accumulation of dry weight, organic and mineral nutrients in plants of selected pea cultivars

Evaluation of the yield and biological value of tarragon (Artemisia dracunculus L.) in the bunch harvest cultivation

The effect of temperature on the broccoli yield and length of the period from head initiation to harvest

Effects of tegument, endosperm, cold treatment and harvest date on germination of wild olive

Polyphenolic compounds and bioelements in fruits of eastern teaberry [Gaultheria procumbens L.] harvested in different fruit maturity phases

Cropping evaluation of white horehound [Marrubium vulgare L.], grown from sowing and seeding

Harvest date determined by different methods of starch index readings and texture changes during apple storage