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Nutrient omission studies in cotton (Gossypium hirsutum)-wheat (Triticum aestivum) cropping system

KrishiKosh

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Title Nutrient omission studies in cotton (Gossypium hirsutum)-wheat (Triticum aestivum) cropping system
Ph.D.
 
Creator ASHAQ HUSSAIN
 
Contributor Dinesh Kumar
 
Subject Bt cotton, Nitrogen, Nutrient omission, Phosphorus, Potassium, Seed cotton Yield, Stalk yield
 
Description T-8752
A field experiment on Bt cotton was conducted during kharif season of year 2010 and 2011, following cotton-wheat cropping system. The experiment had 20 treatments, laid out in Randomized Block Design with three replications in fixed plots. The experiment was conducted to assess the response of cotton to nutrient omissions and estimate yield losses due to sustained nutrient omissions in cotton-wheat cropping system. Treatments comprised omission of N, P, K, S and Zn , 50% omission of N, P, and K, absolute control (no nutrient applied) and optimum plane of nutrition (150-26.4-50-15-3 kg ha-1 N-P-K-S-Zn ). Same nutrient omission treatments were tested on wheat in 50% of plots and uniform N was applied for the remaining 50% of the plots. There was significant reduction in the growth attributes such as plant height, leaf area index, dry matter accumulation due to N and K omission during the year 2010 and due to N, P and K omission during the year 2011. Omission of N and K during the year 2010 and N, P and K during the year 2011 also significantly reduced the yield attributes such as sympodials plant-1 bolls plant-1 and boll weight. The results indicated that N is the most limiting nutrient followed by K and P because their omission resulted in a significant reduction in the growth and yield of cotton. The reduction in seed cotton yield (SCY) during the year 2010 was 28%, 6.7%, 14.5% due to N, P and K omission, respectively. The corresponding figures for the year 2011 were 26%, 15%, and 12 %, respectively. The effect of S and Zn omission on seed cotton yield was statistically non significant. Keywords : Bt cotton, Nitrogen, Nutrient omissio
 
Date 2016-08-27T10:36:12Z
2016-08-27T10:36:12Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/74037
 
Format application/pdf
 
Publisher IARI, DIVISION OF AGRONOMY