Wyniki wyszukiwania

1

Environmental effects of spatially variable nitrogen application

100%

Walczykova M., Zagorda M.

Electronic Journal of Polish Agricultural Universities. Series Agricultural Engineering

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2016

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tom 19

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nr 1

2

Recommendation systems for nitrogen - a review

100%

MacKenzie G. H., Taureau J.-C.

Nawozy i Nawożenie

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2001

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tom 03

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nr 4[09]

3

Variable nitrogen application based on crop sensing

84%

Wollring J., Reusch S., Karlsson C.

Nawozy i Nawożenie

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2001

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tom 03

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nr 4[09]

4

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Sweet basil (Ocimum basilicum L.) flowering affected by foliar nitrogen application

84%

Nurzynska-Wierdak R.

Acta Agrobotanica

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2011

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tom 64

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nr 1

The aromatic and curative properties of basil are connected with the presence of essential oil, mainly in the leaves and flowers. Herb yield and the quality of basil oil are related to the effect of genetic, ontogenetic and environmental factors. In the studies conducted in the years 2008-2009, the effect of basil cultivar and foliar feeding upon selected flowering features was examined. In an unheated plastic tunnel, plants of Kasia, Wala, Genua Star and Opal cultivars were grown. Foliar feeding was done by the application of 0.5% urea solution or by spraying the plants with water. During harvest the characteristic features of flowering were determined, i.e. the number and length of inflorescences, as well as the number of verticils and flowers per inflorescence. A vast differentiation was demonstrated in flowering of sweet basil plants of the examined cultivars. The most inflorescences were formed by the plants of the Polish cultivar Kasia, compared to the remaining ones. The longest inflorescences with the highest number of flowers in the main inflorescence were found in ‘Genua Star’. Foliar feeding of the plants with nitrogen caused a significant increase of inflorescence number, but it did not significantly affect the remaining features of basil flowering.

5

Effect of herbicides and herbicide combinations and of the method of nitrogen application on winter wheat yielding and yield structure

84%

Brzozowska I., Brzozowski J., Hruszka M., Witkowski B.

Acta Agrophysica

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2008

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tom 11

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nr 1[156]

6

Impact of nitrogen [15N] application time on its uptake and distribution in spring barley plant parts

84%

Kalembasa S., Kalembasa D.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

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2002

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tom 05

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nr 2

The aim of the pot experiment was to determine the impact of timing of nitrogen application in the form of ammonium nitrate enriched with the 15N isotope, on the uptake of 15N by spring barley plant and its distribution in grain, awns, leaves, straw, and roots. 1.21 g of N per pot containing 10 kg of the soil was applied at two doses: 2/3 before the sowing, and 1/3 at the tillering phase or at the stalk-shooting phase. The distribution of the applied nitrogen, assumed as 100%, was the highest in grain (61.5%), and the lowest in roots (4%). The mean nitrogen utilisation coefficient value (%) measured with the difference method was 86.9 %, and that for the isotope dilution method 61.0%. Postponing the time of nitrogen application from the tillering to the stalk-shooting phase differentiated the nitrogen utilisation coefficient value, which was higher for the difference method than for the isotope dilution method and it amounted to +32.3% at the tillering.

7

The effects of sewage sludge and nitrogen applications on grain sorghum grown [Sorghum vulgare L.] in Van-Turkey

84%

Akdeniz H., Yilmaz I., Bozkurt M. A., Keskin B.

Polish Journal of Environmental Studies

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2006

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tom 15

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nr 1

The research was conducted in Van, located in the eastern Anatolia region of Turkey. The purpose of this research was to assess environmental hazards to crops and soils from sludge-borne heavy metal; and the potential of using sludge as an alternative to commercial fertilizer, yield, N content and uptake of grain sorghum (Sorghum vulgare L. A-298). Sorghum plants were grown on sandy clay soils under irrigated conditions. Three levels of biosolids were topically applied at rates of 7, 14 and 21 Mg ha⁻¹; and two level of nitrogen were also applied at rates of 40 and 80 kg ha⁻¹. The experimental design was a randomized complete block with four replications. Biosolids increased yields of dry matter and grain, plant length, N content of leaves, total N uptake and harvest index (HI). Grain yield was significantly correlated with plant length, N content of leaf and wholeplant, and total nitrogen uptake. Nitrogen harvest index (NHI) did not show significant correlation with any considered parameter other than harvest index. In contrast, nitrogen use efficiency (NUE) had a negative relationship with dry matter (DM) yield, N content of whole-plant, N content of grain and total N uptake. Diethylenetriamine pentaacetic acid (DTPA) extractable Cd, Pb and especially soil Zn concentrations increased with sewage sludge rates. In general, none of the heavy metals studied in both leaves and seed of crop reached either phytotoxic or toxic levels for humans or livestock [1]. The results showed that sewage sludge could be used as N fertilizer in grain sorghum production.

8

Influence of soil and foliar nitrogen application in autumn on the leaf nitrogen content, growth and the yield of ‘Jonagored’ apple trees

67%

Wrona D.

Zeszyty Problemowe Postępów Nauk Rolniczych

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2009

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tom 536

Celem badań była ocena potrzeb jesiennego nawożenia azotem, zarówno doglebowego, jak i dolistnego w sadzie jabłoniowym. Doświadczenie założono w 2001 roku w Warszawie - Wilanowie. Użyto drzew odmiany Jonagored wysadzonych wiosną 1996 roku na podkładkach P 16 i P 22, w rozstawie 3.5 x 1.2 m. Zastosowano następujące kombinacje nawożenia: (1) N - 0 (bez azotu, kontrola); (2) N - 50 (50 kg N∙ha-1, doglebowo jesienią na całej powierzchni); (3) N - 100 (100 kg N∙ha-1, doglebowo jesienią na całej powierzchni); (4) 5% mocznik (dolistnie); (5) N - 50 + 5% mocznik (50 kg N∙ha-1, doglebowo jesienią + 5% mocznik dolistnie). Zarówno nawożenie doglebowe, jak i dolistne wykonywano jesienią po zbiorze owoców. Zawartość azotu w liściach we wszystkich latach badań nie zależała w sposób istotny od kombinacji nawożenia. Żadna z zastosowanych dawek nawożenia azotem, jak i sposób jego podania nie powodowała silniejszego wzrostu drzew. Nawożenie azotem nie miało też wpływu na plonowanie drzew w poszczególnych latach, ani na sumę plonów za lata (2002-2008). Wskaźnik intensywności owocowania wyrażony stosunkiem sumy plonów (2002-2008) do pola powierzchni przekroju poprzecznego pnia mierzonego jesienią 2008 również nie zależał ani od sposobu ani od dawki zastosowanego nawożenia azotem.

9

Can application of nitrogen fertilizers and salicylic acid improve growth and fruit yield of coriander under water deficit?

67%

Yeganehpoor F., Zehtab-Salmasi S., Shafagh-Kolvanagh J., Ghassemi-Golezani K., Dastborhan S.

Acta Scientiarum Polonorum. Hortorum Cultus

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2019

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tom 18

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nr 3

To investigate the changes in selected morphological traits and yield of coriander (Coriandrum sati- vum L.) in response to fertilization and salicylic acid foliar spraying under different irrigation intervals, two field experiments were conducted as split-factorial based on randomized complete block design with three replicates in 2014 and 2015. Treatments were three irrigation intervals (irrigation after 60, 90 and 120 mm evaporation from class A pan) and combination of fertilization (control, urea 100 kg ha–1, Nitrokara (bio-fertilizer), and 50% urea + Nitrokara) and salicylic acid (0 and 1 mM) that were allocated to the main and sub-plots, respectively. The results showed that plant height, length of the longest internode, stem diameter, branches per plant, dry weights of roots and leaves and fruit yield of coriander were reduced and root length enhanced with increasing the irrigation intervals. However, all of the nitrogen fertilizers, especially combined application of 50% urea and Nitrokara, and salicylic acid spraying, improved the selected morphological traits, and consequently fruit yield per unit area under favorable and limited irrigations.

10

Cost evaluation of the application of the differentiated nitrogen doses on winter wheat field

67%

Jarosz Z., Igras J., Pudelko R., Kubsik K.

Polish Journal of Agronomy

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2010

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nr 02

11

Foliar application of elementary sulphur in the nutrition of poppy (Papaver somniferum L.)

67%

Losak T., Richter R., Skarpa P.

Rośliny Oleiste - Oilseed Crops

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2006

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tom 27

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nr 1

12

Effect of nitrogen fertilization on Cu, Mn, Zn, Fe, B and Mo availability in commercially grown white head cabbage

67%

Domagala-Swiatkiewicz I., Sady W.

Journal of Elementology

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2010

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tom 15

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nr 3

455-465

The results of three-year investigations with cv. Galaxy F1 cabbage grown commercially in an important agricultural region of South Poland are presented. The effect of the rate of ammonium sulphate and UAN (solution of ammonium nitrate + urea), the method of application (placement and broadcast technique) and foliar fertilization (urea and Supervit K) on Cu, Mn, Zn, Fe, B and Mo concentrations in edible parts of cabbage were surveyed. Nitrogen fertilizer was applied at the rate of 120 kg N ha–1. With the placement fertilization method, fertilizer was applied in rows 10 cm deep and 10 cm away from each plant when seedlings were transplanted. Foliar sprayings started at the beginning of intensive leaf growth and continued during the growing season at two-week interval. The foliar nutrition with 2% urea was carried out 3 times and 1% Supervit K was applied once. The field experiment was carried out in 2005-2007 with cv. Galaxy F1 white cabbage on silty clay soil containing 0.91-1.02% organic carbon and soil acidity pHH2O 7.18-8.21 Micronutrient concentrations were below the lower range of the content reported for cabbage grown in non-contaminated areas. Ammonium sulphate significantly increased Mn and Fe concentrations in cabbage heads and decreased B and Mo content. However, the environmental factors considerably modified this tendency. The method of N application affected Mn content in cabbage in 2007 and Mo in 2006 and 2007. Slightly higher manganese and molybdenum concentrations for placement fertilization were noted. In 2005 and 2006, the placement fertilization at the rate of 75% N and supplemented foliar sprays increased Mo content in cabbage.

13

Mulching effects and nitrogen application on the performance of Zea mays L: crop growth and nutrient accumulation

67%

Oroka F. O.

International Letters of Natural Sciences

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2016

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tom 51

Maize is an agronomic cereal species that is sensitive to nutrient applications, especially nitrogen. Field experiments were conducted in 2011 and 2012 to evaluate the effect of nitrogen and mulching using dried weeds on maize growth and nutrient accumulation. The study was located in the Research Farm of the Agricultural Science Education Unit of the Delta State University, Abraka, Nigeria ((latitude 50 46’N and longitude 60 5’E). The experiment consist of eight (8) treatments (i) control (ii) 40kgNha-1 (iii) 80kgNha-1 (iv) 120kgNha-1 (v) 4.5t ha-1 Panicum maximum + 40kgNha-1 (vi) 4.5t ha-1 Pueraria phaseoloides + 40kgNha-1 (vii) 4.5t ha-1 Eleusine indica + 40kgNha-1 (viii) 4.5t ha-1 Stylosanthes gracilis + 40kgNha-1. The treatments were replicated three times. From research results, the combination of Pueraria phaseoloides with 40kgNha-1 showed higher maize plant height, foliage development attributes, shoot dry matter, crop growth indices and nutrient uptake compared to other combinations, while only nitrogen application of 120kgNha-1 recorded the highest in all the treatments. It can be concluded based on the results in this study, that legume based weeds as mulch can be supplemented with nitrogen to improve maize growth.

14

The influence of alkalization type waste activated sludges on the yield, content and value of utilization coefficient of nitrogen by tested plants

67%

Kalembasa S., Wysokinski A.

Polish Journal of Soil Science

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2006

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tom 39

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nr 2

In a 3-year pot experiment, the fertilizing value was investigated of fresh and 3 month composted waste activated sludges, FYM and their mixtures with CaO and brown-coal ash. Higher yields of maize and sunflowers were achieved from objects fertilized with waste activated sludges with the addition of ash than those with the addition of CaO or without any addition. The effectiveness of waste activated sludges from Siedlce and Łuków, applied as either fresh or composted, was similar. Higher yields were achieved from objects fertilized with waste activated sludges than fertilized with FYM. The content of nitrogen was higher in the biomass of maize and sunflower harvested from objects fertilized with only waste activated sludges than those with mixtures of waste activated sludges with CaO and brown-coal ash. The highest value of nitrogen utilization coefficient calculated for the whole period of the experiment was achieved from objects fertilized with waste activated sludges and FYM with the addition of ash, slightly lower from objects on which waste activated sludges and FYM with the addition of ash and CaO were applied, and the lowest from objects on which mixture of FYM and waste activated sludges with the addition of CaO were applied.

Ograniczanie wyników

Environmental effects of spatially variable nitrogen application

Recommendation systems for nitrogen - a review

Variable nitrogen application based on crop sensing

Sweet basil (Ocimum basilicum L.) flowering affected by foliar nitrogen application

Effect of herbicides and herbicide combinations and of the method of nitrogen application on winter wheat yielding and yield structure

Impact of nitrogen [15N] application time on its uptake and distribution in spring barley plant parts

The effects of sewage sludge and nitrogen applications on grain sorghum grown [Sorghum vulgare L.] in Van-Turkey

Influence of soil and foliar nitrogen application in autumn on the leaf nitrogen content, growth and the yield of ‘Jonagored’ apple trees

Can application of nitrogen fertilizers and salicylic acid improve growth and fruit yield of coriander under water deficit?

Cost evaluation of the application of the differentiated nitrogen doses on winter wheat field

Foliar application of elementary sulphur in the nutrition of poppy (Papaver somniferum L.)

Effect of nitrogen fertilization on Cu, Mn, Zn, Fe, B and Mo availability in commercially grown white head cabbage

Mulching effects and nitrogen application on the performance of Zea mays L: crop growth and nutrient accumulation

The influence of alkalization type waste activated sludges on the yield, content and value of utilization coefficient of nitrogen by tested plants