Vol. 9 (4) : July-August 2018 issue
Green Farming Vol. 9 (4) : 641-643 ; July-August, 2018
Effect of split application of nitrogen and potassium on growth and yield of summer irrigated cotton
S. ABARNAa1* and G. SRINIVASANb2
aDeptt. of Agronomy, Anbil Dharmalingam Agricultural College & Research Institute, Tiruchirapalli – 620 027 , bDeptt. of Agronomy, S. Thangapazham Agricultual College, Vasudevanallur - 627 760, District Tirunelveli Tamil Nadu Agricultural University, Coimbatore (Tamil Nadu)
Designation : 1P.G. Student *(abarnahema@gmail.com), 2Dean I/c & Professor
Subject : Agronomy and Crop Production
Paper No. : P-7337
Total Pages : 3
Received : 04 July 2018
Revised accepted : 20 July 2018
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Citation :
S. ABARNA and G. SRINIVASAN. 2018. Effect of split application of nitrogen and potassium on growth and yield of summer irrigated cotton. Green Farming Vol. 9 (4) : 641-643 ; July-August, 2018
ABSTRACT
A field experiment was conducted at Anbil Dharmalingam Agricultural College and Research Institute, Tiruchirapalli to study the impact of split application of nitrogen and potassium on growth and yield of cotton during summer 2017. The experiment was laid out in Randomized block design (RBD) with three replications and eight treatments viz., 50% N & K as basal + 50% N & K at 45 DAS (T1), 50% N & K as basal + 25% N & K at 45 DAS + 25% N & K at 60 DAS (T2), 25% N & 50% K as basal + 50% N & 25% K at 45 DAS + 25% N & K at 60 DAS (T3), 25% N & K as basal + 25% N & K at 45 DAS + 25% N & K at 60 DAS + 25% N & K at 75DAS (T4), 50% N & K as basal + 12.5% N & K at 45 DAS + 12.5% N & K at 60 DAS + 12.5% N & K at 75 DAS + 12.5% N & K at 90 DAS (T5), 0 % N & 50% K in basal + 50% N & 25% K at 45 DAS + 50% N & 25% K at 60 DAS (T6), 0 % N &50% K in basal + 50% N & 25% K at 45 DAS + 25% N & K at 60 DAS + 25% N alone at 75 DAS (T7) and 0 % N & 50% K in basal + 25% N & 50% K at 45 DAS + 25% N at 60 DAS + 25% at 75 DAS + 25% N at 90 DAS (T8). The results indicated that split application of nitrogen and potassium upto boll developmental stage (90 DAS) significantly influenced the growth and yield of cotton. Application of 50 per cent N and K as basal + 25 per cent N and K each at 60, 75 and 90 DAS (T5) was superior in terms of growth parameters. Skipping N and 50 per cent K as basal + 25 per cent N and 50 per cent K at 45 DAS + 25 per cent N at 60 DAS + 25 per cent N at 75 DAS + 25 per cent N at 90 DAS (T8) recorded the highest seed cotton yield.
Key words :
Cotton, Growth & yield attributes, Nitrogen, Potassium, Recommended dose, Split application.
