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ANALYSIS OF THE RESPONSE CURVES OF WHEAT YIELD TO NITROGEN FERTILIZATION AS RELATED TO ENVIRONMENT POLLUTION
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Abstract: HayamSaed Mohamed .Analysis of yield response curve of wheat yield to nitrogen fertilization as related to environment pollution Unpublished Doctor of Philosophy in Agriculture environment Science, Inst. of Environ. Studies and Res., Ain shams univ.2014.
Two field experiments were conducted at Giza Agric.Res.Station, Agric.Res.Cent., Giza Governorate, Egypt during 2009/2010 and 2010/2011 seasons. The experiments aimed to study the response of some wheat cultivars namely: Giza 168, Sakha 94, Gemmeiza 10 and Sids 12 to six different N fertilizer levels (0, 25, 50, 75, 100 and 125 kg N/fad) and determine the degree of the response of grain yield to N fertilizer levels in order to estimate the economic optimum N rate. Also, to investigate the relation between grain yield and some related characters using some multivariate procedures i.e. correlation and path-coefficient analysis. The design used was strip-plot in three replicates where wheat cultivars were arranged in the vertical strips while N fertilizer levels were in the horizontal strips.
The results could be summarized as follows:
1- The tested wheat cultivars significantly affected growth characters, yield components, biological, grain and straw yields but insignificantly affected harvest index.
2- The increase in N fertilizer level significantly affected growth, yield components, biological, grain and straw yields but harvest index was not significantly influenced by N level.
3- The quadratic model worked well for describing the relation between grain yield and N fertilizer levels.
4- The economic optimum N rate ranged from 55 to 87.47 Kg N/fad.
5- Grain yield exhibited highly significant and positive correlation with each of plant height, flag leaf area, number og =f spikes/m2, spike length, number ofspikelets/spike, kernels/spike, kernel weight/spike and 1000-kernel weight.
6- Weight of 1000 kernels and number of spikelets/spike were the most important contributing characters in the total variability of grain yield.
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| Publication year |
2014
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| Availability location |
مكتبة معهد الدراسات والبحوث البيئية -جامعة عين شمس
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| Availability number |
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| Organization Name |
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| Country |
Egypt
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| Publisher |
Name:
معهد الدراسات والبحوث البيئية -جامعة عين شمس
Place:
مكتبة معهد الدراسات والبحوث البيئية -جامعة عين شمس
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| Author(s) from ARC |
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| Publication Type |
PhD Thesis
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