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Volume 3, Issue 2      April-June, 2015

MORPHOLOGICAL CHARACTERS IN BT COTTON AS INFLUENCED BY THE SPLIT APPLICATION OF NITROGEN APPLIED AT DIFFERENT GROWTH STAGES UNDER THE AGRO-CLIMATIC CONDITION OF DERA GHAZI KHAN, PAKISTAN
 
Shuaib Kaleem*1, M. Shabbir1 and M. N. Abbas2
1Agriculture Adaptive Research Complex, Dera Ghazi Khan, Pakistan
2Department of Agronomy, College of Agriculture, Dera Ghazi Khan, Pakistan
 
ABSTRACT
 
Nitrogen plays a significant role to improve the growth and yield of cotton. Plant growth, assimilation, morpho-physiological expressions and photosynthate translocation are closely related to nutrients availability. A field trial to evaluate the response of different nitrogen splits on growth and yield components of cotton was conducted under the agro climatic conditions of Dera Ghazi Khan, Pakistan during 2012. Fuzzy seed (@ 20 kg ha-1 of cotton genotype (BT-MNH 886) was sown under Randomized Complete Block Design (RCBD) with three replications. Fixed nitrogen (N) dose (375 kg ha-1) which (375 kg ha-1), was applied in four treatments as a source of nitrogen; T1=5 N splits (@75.00 kg ha-1 per split), T2=6 N splits (@62.50 kg ha-1 per split), T3=7 N splits (@53.57.00 kg ha-1 per split), and T4=8 N splits (@46.87 kg ha-1 per split). The data were recorded on the basis of yield and yield attributes of cotton crop that included plant height, leaf area index (LAI), number of bolls per plant, bolls weight and seed cotton yield. On increasing N splits, vegetative characteristic of cotton i.e., plant height was improved while, features like leaf area index, bolls weight and seed cotton yield increased up to certain level of N splits, T3 (7 splits). Further, N split (8 splits in T4) caused decrease in all these features except for plant height. So the growth and yield performance of cotton genotype (BT-886) was significantly influenced up to 7 splits of nitrogen fertilizer, improving morphological characteristics of cotton crop ultimately enhancing the seed cotton yield.
Keywords:Cotton genotype, nitrogen splits, growth and yield components
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