| Titles |
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English :
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Effect of nitrogen fertilizer levels and its application times on soybean productivity
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Arabic :
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تأثير مستويات السماد النيتروجينى ومواعيد إضافته على إنتاجية فول الصويا
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| Abstract |
Two field experiments were carried out at Sakha Agriculture Research Station Farm during two successive summer seasons of 2002 and 2003 using soybean (Glycine max L.) variety Giza 111. Split plot design was used. The main plots were assigned to three nitrogen application times: 1- applicating of nitrogen fertilizer with the first irrigation (T1), 2- applicating of nitrogen fertilizer with the second irrigation (T2), 3- applicating of nitrogen fertilizer with the third irrigation (T3). The sub plots were allotted for four nitrogen levels i.e., 0 (N0), 20 (N20), 40 (N40) and 60 (N60) kg N fed.-1 to investigate the effect of nitrogen application times and levels on soybean seed, straw, protein and oil yields kg fed.-1 as well as residual available N and P in the soil. The plot area was 15 m2.
The obtained results show that nitrogen application times high significantly affected seed, straw, oil and protein yields. T1 treatment gave the highest straw yield in both seasons. While T2 treatment gave the highest seed yield (996 and 965 kg fed-1), oil yield (231 and 287 kg fed-1) and protein yield (356 and 346 kg fed-1) in the first and second seasons, respectively. Nitrogen levels high significantly affected seed, straw, oil and protein yields. The highest values were obtained with N60 treatment.
Applicating of nitrogen fertilizer with the second irrigation T2 increased nitrogen use efficiency. On the other hand, increasing nitrogen fertilizer level led to clear decrease in nitrogen use efficiency values. T3 treatment gave the highest nodules number, nodules dry weight and the residual N, P in the soil. N60 treatment had the highest nodules number and nodules dry weight
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| Publication year |
2004
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| Pages |
4757-4767
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| Availability location |
Soils, Water and Environment Research Institute, ARC, 9 Cairo Univ. St., Giza, Egypt
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| Availability number |
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| Organization Name |
Soil, Water and Environment Research Institute (SWERI)
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| Country |
Egypt
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| City |
Mansoura
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| Publisher |
Name:
Faculty of Agriculture, Mansoura University
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| serial title |
Mansoura University Journal of Agricultural Sciences
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| ISSN |
1110-0346
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| Volume |
29
. 8
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| Department |
Soil Fertility and Plant Nutrition Research
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| Author(s) from ARC |
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| Agris Categories |
Soil fertility
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AGROVOC
TERMS |
Glycine max.
Nitrogen fertilizers.
Productivity.
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| Publication Type |
Journal
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