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Information Journal Paper

Title

EFFECT OF NITROGEN CONSUMPTION ON IT'S UPTAKE AND STORAGE EFFICIENCY IN BREAD WHEAT CULTIVARS

Pages

  167-181

Abstract

 Now a days, there is a great tendency of the sustainable and low-input agricultural system based on economic and ecological reasons. Nitrogen (N) is of the main input on wheat in high-input in this systems that pollutes soil and Underground water. Therefore, availability of varieties to high N uptake efficiency and N utilization efficiency is very important. This research was conducted with 20 wheat cultivars in a clay-loam soil with 2 N level (0 and 200 kg ha-1) in a RCB design with three replications in 2007-08 plant season. The results showed, high reaction and diversity to N reducing in genotypes in most characters. There were significant differences in genotypes. Evaluation of G´N interactions showed significant differences for thousand kernel weight, grain N concentration, stable N concentration, N uptake efficiency and N use efficiency at p=1% and number of seed per spike at p<5%. The result of comparison of means trials wrer showed that Koohdasht, Chamran and Gobustan cultivars at both N levels had high GRAIN YIELD, but Zagros, Talee-38 and Gunashli had high GRAIN YIELD at N0 and low at N+. Also, the experiment showed high diversity for N uptake efficiency and NUE for all N levels, G and GxN interaction. Mean comparision showed cultivars Gobustan, Talee-38, Zagross and Koohdasht the highest N uptake efficiency ones. For NUE cultivars Gunashli, Talee-38 and Darya were the best at two N levels. The cultivar of Nurlu-99 showed the highest sustainable to N reduction. In this study based on GRAIN YIELD, N uptake efficiency and NUE, Gobustan, Koohdasht and Chamran purpose for breeding as the best cultivars.

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