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Yield of cocksfoot (Dactylis glomerata L.) and its nitrogen and sulphur content after fertilization with various forms of these nutrients

100%

Kaczor A., Brodowska M. S.

Journal of Elementology

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2009

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tom 14

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nr 4

This study has analyzed the effect of fertilization with various forms of nitrogen and sulphur on cocksfoot yield and on the content of these nutrients in the plant. The study was based on a strict experiment conducted on soil material from the arable layer of brown soil of clayey silt granulometric composition. The soil used in the experiment was characterized by slight acidity and low content of assimilable forms of phosphorus, potassium, magnesium and sulphur. The results indicate that the experimental factors caused significant variation in cocksfoot yield. Significant variations in yield also occurred as a result of the interaction between these factors. The highest yields were obtained where nitrogen was applied in the liquid form (UAN-30) and sulphur was applied in the form of Na2SO4. Significant increases in yield after application of elemental sulphur were not observed until the second cut was harvested, which clearly indicates that this is a slow-acting fertilizer. Fertilization with various forms of nitrogen and sulphur also caused marked variation in total S content, total N content and N-NO3 in the plants. Total sulphur content – depending on the experimental object and on the time of harvest – ranged from 1.37 to 3.15 g S⋅kg-1, while total nitrogen content ranged from 29.06 to 38.72 g N⋅kg-1. The data obtained indicate that sulphur content in plants that were not fertilized with this nutrient was much lower than is considered optimal for grasses. This explains the effect of sulphur on yield observed in the experiment. Fertilization with sulphur also had a beneficial effect on nitrogen metabolism, manifested as a more than twofold decrease in nitrate nitrogen in the plants fertilized with sulphur.

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Response of Chinese cabbage grown in the spring season to differentiated forms of nitrogen fertilisation

80%

Krezel J., Kolota E.

Folia Horticulturae

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2011

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tom 23

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nr 1

3

Effect of the nitrogen fertilizer forms and time of their application on the yield of herb and essential oil of Ocimum americanum L.

80%

Omer E. A., Elsayed A.-G. A., El-Lathy A., Khattab M. E., Sabra A. S.

Herba Polonica

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2008

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tom 54

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nr 1

The effect of various forms of nitrogen fertilizer and dates of application on Ocimum amercianum yield and essential oil (ton/feddan, 1 feddan = 4200 m2) was studied in two successive seasons. In both seasons the total yields of fresh and dry herb after the application of ammonium sulfate surpassed that of ammonium nitrate and urea. Dividing the full amount of fertilizer into two equal portions gave the highest yields in most cuts. Nitrogen fertilizers affected the percentage of essential oil in most cuts. The highest oil percentage was obtained after the application of ammonium nitrate and ammonium sulfate in both cuts in the first season, respectively, and urea in the second season. Early addition of the full amount of fertilizer was more effective in increasing oil percentage as compared to other two dates of application. Ammonium sulfate in the first season and urea in the second one produced the highest total oil yields either per plant or per feddan. One application of the full amount of ammonium nitrate at the early date produced the highest total percentage of monoterpenic compounds as compared to ammonium sulfate and urea. One application the full amount of nitrogen fertilizer at the early date was superior to other treatments. The opposite was true for sesquiterpenes. Oxygenated compounds showed the same trend of monoterpenic compounds. Thus, the application of ammonium sulfate at the rate of 60 kg N/fed/season at two equal portions in each cut could be recommended for maximizing herb, leaves and oil yields of Ocimum amercianum, L. var. pilosum plants.

Ograniczanie wyników

1 Folia Horticulturae

1 Herba Polonica

1 Journal of Elementology

1 Brodowska M. S.

1 El-Lathy A.

1 Elsayed A.-G. A.

1 Kaczor A.

1 Khattab M. E.

1 Kolota E.

1 Krezel J.

1 Omer E. A.

1 Sabra A. S.

1 2011

1 2009

1 2008

Yield of cocksfoot (Dactylis glomerata L.) and its nitrogen and sulphur content after fertilization with various forms of these nutrients

Response of Chinese cabbage grown in the spring season to differentiated forms of nitrogen fertilisation

Effect of the nitrogen fertilizer forms and time of their application on the yield of herb and essential oil of Ocimum americanum L.