Wyniki wyszukiwania - AGRO

1

Relationship between yield components and seed yield obtained from oil crops of the family Brassicaceae

100%

Jankowski K. J., Budzynski W. S., Hulanicki P.

Rośliny Oleiste - Oilseed Crops

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2015

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tom 36

2

Influence of pollination by honey bee on seed yield on selected cultivars of winter rape

100%

Kamler F., Jas S.

Journal of Apicultural Science

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2003

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tom 47

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nr 2

3

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Tillage management effects on pea yield and chemical composition of pea seeds

86%

Wozniak A., Gaweda D.

Acta Scientiarum Polonorum. Hortorum Cultus

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2019

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tom 18

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nr 1

Productivity of plants is determined by multiple factors that directly affect one another, therefore yield variability may be high and difficult to predict. Most often, however, a lower crop yield is achieved in the notillage system than in the ploughing system. An exact field experiment was undertaken to determine the yield and chemical composition of pea seeds sown under conditions of: 1) conventional tillage – CT (shallow ploughing and harrowing after the harvest of previous crop, pre-winter ploughing in winter); 2) reduced tillage – RT (stubble cultivator after the harvest of previous crop); and 3) herbicide tillage – HT (only glyphosate after the harvest of previous crop). A cultivation unit was applied on all plots in the springtime. Pea seed yield was higher by 14.1% in the CT than in the RT system and by 50.5% than in the HT system. The CT system was increasing the plant number m–2, number of pods and seeds m–2, seed mass per plant, and 1000 seeds mass, compared to the other systems. Protein content of seeds was at a similar level in all analyzed tillage systems, but was affected by the study year. In turn, the mineral composition of seeds was determined by both tillage system and study year. The seeds harvested from CT plots contained more phosphorus and iron, those from RT plots – more calcium and zinc, whereas those from HT plots – more phytate-P, potassium, magnesium, and copper, compared to the seeds from the other plots

4

Effect of seed processing, seeding rate and foliar micronutrient fertilization on generative characteristics and yield of quinoa (Chenopodium quinoa Willd.)

86%

Gesinski K.

Acta Scientiarum Polonorum. Agricultura

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2018

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tom 17

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nr 4

5

Influence of meteorological conditions on the yield of winter oilseed rape in Lower Silesia

86%

Dziezyc H., Chmura K., Piotrowski M.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2013

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tom 45

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nr 2

This work uses the results of Post-registration Cultivar and Agricultural Experimentation conducted in 1999–2011 in Lower Silesia, on soils of very good and good wheat complex. The rape vegetation season was divided into five periods that approximately corresponded to the phenological phases of the plant, namely: September-November (from sowing to stemming the growing season in the autumn), December-March (stunted vegetation – renewal of vegetation), April (renewal of vegetation – the beginning of flowering), May (flowering), June (end of flowering – technical maturity). In the constructed regression model the following factors were included: the average air temperature and total precipitation in the periods, the content of phosphorus, potassium and pH of soil and fertilization with nitrogen, phosphorus and potassium. Comparing the impact of meteorological conditions in different growing periods of winter rape, it was found that the weakest impact on the yield had temperature and precipitation from September to November. During this period, the optimum for yield are the following conditions: average temperature 10.4°C and precipitation total 145 mm. The winter period (December- March) has the strongest impact on the yield of rape. The yield is conspicuously higher with lower average air temperatures. Optimal for yield is precipitation of 171 mm (highest tested) and a relatively low average air temperature (–0.9°C). In April, the decisive factor is rainfall. Its lower values (12 mm) favour higher yield. The optimum weather in this period is 12 mm precipitation and average temperature of 9.1°C. Rape yield increases with increasing average air temperature in May and is highest when its value is 15°C and rainfall in this month is above average (73 mm). The weather in June has less impact on rape crop than in the three previous periods. The optimal layout is: 27 mm precipitation and temperature 16°C, these values being the smallest tested.

6

Effect of the ploughing depth and the weed control method on the winter oilseed rape yield

86%

Jankowski K. J., Budzynski W. S.

Acta Scientiarum Polonorum. Agricultura

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2003

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tom 02

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nr 1

The effect of differentiated pre-sow ploughing depth (30, 20 and 10 cm) and weed control method (mechanical, chemical, combined mechanical and chemical) on the overwintering, weed infestation, yield and quality of seeds of oilseed rape was tested. Shallower ploughing worsened the main traits of the autumn condition of rape plants. Rape plants treated chemically had better-formed rosettes than those treated mechanically. Ploughing made to the depth of 30 and 20 cm did not significantly differentiate the yield of rape plants. However, a significant decrease (9-13%) in the yield occurred when the ploughing depth went down to 10 cm. The highest yield was obtained from the rape controlled chemically against weeds. The yield-protective effect of the combined mechanical and chemical weed control was comparable to that of mechanical method.

7

The effect of pesticides on growth and seed yield of faba bean

86%

Grochot G., Fordonski G., Zuk-Golaszewska K.

Polish Journal of Natural Sciences

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2002

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tom 10

8

Effect of the sowing method, date and row spacing on the yielding of Stadion perennial ryegrass [Lolium perenne L.] cultivated for seed

86%

Szczepanek M., Skinder Z.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

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2004

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tom 07

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nr 2

The aim of the present research was to evaluate the yielding of perennial ryegrass (Lolium perenne L.), 'Stadion' lawn cultivar grown for seed, depending on the sowing method, date and row spacing. The research was carried out at the Experiment Station for Cultivar Testing at Chrzšstowo, in the vicinity of Bydgoszcz. The experiment was carried out over 1998-2002 in three series; each of them included the sowing year and two years of full use for farming purposes. The experimental factors included: I - sowing method/date: autumn pure stand, spring pure stand, undersown perennial ryegrass in spring barley cultivated for green matter and undersown perennial ryegrass in spring barley grown for grain, II - row spacing: 12 cm - narrow, 24 cm - average wide, 36 cm - wide and 48 cm - very wide. In the first year of full use for farming purposes, the seed yields were lowest when ryegrass was sown in autumn. Furthermore the yield of perennial ryegrass sown in spring in pure stand was significantly lower than that of undersown perennial ryegrass in barley in both its growing variants. The seed yield in the second year was significantly higher for sowing together with a cover crop, as compared with the yields obtained for autumn sowing. The application of varied row spacing showed a significant effect on the seed yield neither in the first nor in the second year of full use for farming purposes.

9

The effect of methods of seedling planting and protecting plants against frost on the seed yield of kohlrabi

86%

Orlowski M., Rekowska E., Jadczak D.

Vegetable Crops Research Bulletin

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1998

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tom 49

10

Efficacy of weed control for opium poppy (Papaver somniferum L.) with a mixture of tembotrione and fluroxypyr

72%

Wojtowicz M., Wojtowicz A., Wielebski F.

Journal of Plant Protection Research

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2016

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tom 56

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nr 2

The study was carried out in the years 2013 and 2014 at the Łagiewniki farm to determine the effect of some herbicides on the yield and development of two opium poppy cultivars: ‘Lazur’ – with high morphine content, and ‘Borowski Biały’ – with low morphine content. The development and yield of the poppy was a derivative of environmental and agronomic conditions. The mixture of tembotrione and fluroxypyr applied post-emergence at a rate of 88 and 75 g a.i. · ha−1, respectively, effectively controlled most weeds which are harmful for the poppy and did not phytotoxically affect opium poppy plants. The level of yield also depended on the cultivar’s ability to grow under unfavourable weather conditions. A lower yield was noted for the cultivar with a lower content of morphine – ‘Borowski Biały’.

11

Using nitrogen and sulphur for the poppy (Papaver somniferum L.) nutrition

72%

Losak T., Palenicek L.

Rośliny Oleiste - Oilseed Crops

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2005

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tom 26

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nr 1

12

Effect of the methods of additional feeding with microelements (B, Mο) on the yield structure and seed yield of red clover

72%

Wilczek M., Cwintal M.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

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2008

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tom 11

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nr 4

13

Response of winter rapeseed to biostimulator application and sowing method. Part II. Seed yield components

72%

Sikorska A., Gugala M., Zarzecka K.

Acta Scientiarum Polonorum. Agricultura

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2018

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tom 17

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nr 4

14

Spring wheat yielding and the content of protein and zinc in its grain depending on zinc fertilisation

72%

Shekari S., Mohammadi H., Pourmohammad A., Avanes A., Benam M. B. K.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

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2015

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tom 18

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nr 1

15

Effectiveness of chemical protection against weeds applied to poppy [Papaver somniferum L.]

72%

Wojtowicz M., Wojtowicz A.

Journal of Plant Protection Research

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2009

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tom 49

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nr 2

209-215

The aim of the presented studies was to determine the effect of chemical weed control on the development and yield of native poppy cultivars. The results of presented experiment showed that the native poppy cultivars are more susceptible to herbicides than ‘Opal’ and ‘Lazur’ cultivars. The yield of ‘Michałko’ cultivar in all treatments of chemical protection was very low. It was proved that the suggestion of a necessary protection of ‘Mieszko’ cultivar against weeds with lower doses of herbicides than the doses applied in the cultures of cultivars with a high content of morphine is justified. ‘Mieszko’ cultivar gave the highest yield on plots protected after sowing with Lentipur Flo™ 500 SC (a.s. chlorotoluron) in the dose of 1.2 l/ha and in the growth stage of 4 leaves, when the treatment was carried out with Callisto™ 100 SC (a.s. mesotrione) in the dose of 0.4 l/ha. Positive results of weed control after the application of these herbicides indicate the possibility to initiate studies aiming at authorization to use these herbicides in growing of the native cultivars of poppy (minor crop).

16

The effect of summer seedling planting dates on the development of seed stalks in shallot (Allium cepa L. var. ascalonicum Backer)

72%

Tendaj M., Mysiak B.

Acta Scientiarum Polonorum. Hortorum Cultus

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2013

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tom 12

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nr 6

Up-to-date production of shallots for commercial purposes was limited due to low supply of the seeding material as well as no breeding cultivars that would produce seeds. Local populations commonly grown in various countries are reproduced mainly in vegetative way, because they usually do not produce generative shoots nor seeds, or they are formed, but in a very reduced number. The aim of this study, conducted in the period 2009–2012, was to evaluate generative growth and seed production in shallot grown from seedlings planted in summer at different dates, without producing mother bulbs. The study included 4 shallot cultivars – ‘Toto’, ‘Ambition F1’, ‘Bonilla F1’, and ‘Matador F`1’. Seedlings (4 weeks old) were planted in the field on three dates – 3rd decade of July, 1st decade of August, and 3rd decade of August. In the second year of cultivation, after the plants had overwintered in the ground, losses in plants, the percentage of plants producing seed stalks and some traits of these stalks as well as seed yield in the true breeding cultivar ‘Toto’ were determined. Plants of the other cultivars were not allowed to produce seeds (inflorescence umbels were topped before flower opening), since these were hybrids and undesired cross-breeding could occur. The study showed that overwintering losses in plants were on average 26.3%, but they were the lowest in cv. ‘Toto’, in particular among plants obtained from the first date of planting seedlings. Irrespective of the cultivar, the largest amount of plants with developed seed stalks and with their highest number per plant were recorded in the treatments where the first planting date was used. A delay in planting seedlings in the first year of cultivation by 2–4 weeks had a significant effect on reducing the percentage of plants developing seed stalks in the second year, while in cv. ‘Toto” it resulted in a very high decrease in seed yield.

17

Correlations and path analysis of the components of Festuca pratensis seed yield

72%

Wojtowicz T., Binek A., Mos M.

Łąkarstwo w Polsce

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2009

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tom 12

Seed yield and yield components were investigated using single meadow fescue plants (Festuca pratensis Huds.) grown in widely spaced rows. Plants of four cultivars (Cykada, Skawa, Skiba and Skra), entered into the EU catalogue, made the representative sample. On the basis of observations and measurements of 20 plants from two harvest dates and three vegetation seasons, the number of days till heading, number of panicles, seed weight per panicle, degree of panicle axis maturity, weight of fallen seeds, the shedding being induced under laboratory conditions, and gross seed yield. For these traits mean values, coefficients of variation, simple correlation coefficients and Wright’s path coefficients were calculated. Over the period of the three-year experiments the greatest variation was found for seed weight per panicle, seed yield per plant and number of panicles, especially in the first harvest year. From among the investigated traits, seed yield per plant was most correlated with the number of panicles per plant (r = 0.480** to r = 0.829**) and seed weight per panicle (r = 0.336* to r = 0.820**). As the number of panicles per plant increased, the weight of fallen seeds increased as well (r = 0.432** to r = 0.620**). The path analysis confirmed the finding that the number of panicles per plant, increasing in successive years, determined the seed yield by 12–23%, 40–46% and 63–74% respectively. The greatest direct effects of the number of panicles and seed weight per panicle on seed yield were observed in the second harvest year.

18

Effect of some bioregulators on white lupine (Lupinus termis) seed yield and its components and on endogenous hormones content in seeds

72%

El-Saeid H. M., Abouziena H. F., AbdAlla M. S. A.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

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2011

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tom 14

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nr 4

19

Influence of nitrogen fertilization on the seed yield and the content and quality of fat in pot marigold (Calendula officinalis L.) cultivars

72%

Krol B.

Agronomy Science

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2017

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tom 72

|

nr 3

20

Effect of sulphur fertilisation on seed yield and yield components of broad bean on the background of different levels of potassium content in soil

72%

Barlog P., Niewiadomska A., Ambrozy-Deregowska K.

Fragmenta Agronomica

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2014

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tom 31

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nr 2

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