| Titles |
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English :
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The quantitative Response of wheat yield to N-Fertilizer in Calcareous Soil
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Arabic :
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التقدير الكمي لاستجابة محصول القمح للتسميد النتروجيني في الأراضي الجيرية
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| Abstract |
Two field experiments were conducted at Nubaria Agricultural Research Station (calcareous soil) during two successive seasons of 2002/2003 and 2003/2004 to study the response of wheat (Triticum aestivum L.) to N-fertilizer levels (0, 25, 50, 75, 100 and 125 kg N fed-1), (fed = 4200 m2). The obtained results indicated that, over both seasons, the highest values of grain and biological yield (2814 and 7561 kg fed-1) as well as N-uptake in grain and aboveground biomass (50.37 and 63.90 kg N fed-1) were obtained when wheat plants received 100 kg N fed-1 and its tented to decrease when the plant received the highest N-rate (125 kg N fed-1).
The quadratic polynomial equation (QPE) appeared to be sensitive and capable to illustrate the response of wheat grain (GY), straw (StY), biological (BY) and protein yields as well as N-uptake in grain, straw and aboveground biomass plant to applied of N-fertilizer where the obtained values of R2 (>0.878) were highly significant. Although increases N-fertilizer levels increased GY, StY and BY as well as N uptake and protein yield, but decrease the N-fertilizer use and uptake efficiencies. Over both seasons, the estimated maximum GY, StY and BY calculated by QPE were 2752, 4784 and 7529 kg fed-1 when the wheat plant received 110.8, 103.4 and 106.2 kg N fed-1, respectively, while the calculated maximum rates of N-fertilizer were 116.9, 128.2 and 118.7 kg N fed-1 to obtain maximum N-uptake in grain, straw and total aboveground parts of 49.47, 13.87 and 63.22 kg N fed-1, respectively. The calculated maximum protein yield produced by grain, straw and total aboveground parts were 281.78, 79.07 and 360.47 kg fed-1, when the wheat plant received 116.8, 128.2 and 118.8 kg N fed-1, respectively. The economic optimum rate of N-fertilizer calculated by QPE was 105.0 kg fed-1 to obtain 2746 kg grain fed-1, while the economic optimum rate of N-fertilizer was 101.4 kg fed-1 for producing
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| Publication year |
2005
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| Pages |
265-274
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| Availability location |
(معهد بحوث المحاصيل الحقلية- 9 شارع الجامعة- الجيزة)
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| Availability number |
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| Organization Name |
Field Crops Research Institute (FCRI)
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| City |
الإسكندرية
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| serial title |
الإسكندرية للتبادل العلمي
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| Author(s) from ARC |
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| Agris Categories |
Agriculture - General aspects
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AGROVOC
TERMS |
Calcareous soils.
Fertilizers.
Wheats.
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| Publication Type |
Journal
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