Effect of spacing and nitrogen doses on productivity and quality of cotton (gossypium hirsutum L.) cultivar H-1098(i)
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Date
2016
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Abstract
The present study entitled “Effect of spacing and nitrogen doses on productivity and
quality of cotton (Gossypium hirsutum L.) cultivar H- 1098 (i)”, was conducted at cotton research
station, Sirsa during Kharif 2015. The soil of the experimental field was loamy sand, slightly alkaline
in reaction, low in organic carbon and nitrogen, medium in phosphorus and high in potash. The
experiment was conducted in split plot design with three replications. The experiment consist of four
spacing of cotton crop viz. S1= 67.5 cm × 10 cm , S2 = 67.5 cm × 15 cm , S3= 67.5 cm × 22.5 cm and
S4 = 67.5 cm × 30 cm were kept in main plots while four levels of nitrogen i.e. 75%, 100%, 125%,
and 150% application of the recommended dose were kept in subplots. Recommended dose of nitrogen
was 87.5 kg ha-1. Maximum plant height and leaf area index was recorded with narrow spacing of 67.5
cm × 10 cm which was significantly higher than rest of spacing. However, wider spacing (67.5 cm × 30
cm) had lesser plant density resulted into higher dry matter accumulation, sympodial branches plant-1,
number of bolls plant-1 and seed cotton yield plant-1. Whereas, seed cotton yield hectare-1, gross returns,
net returns and B:C were maximum under 67.5 cm × 15 cm spacing. Nitrogen content in seed and plant
was not affected due to different spacing but total uptake was maximum with spacing of 67.5 cm × 10
cm. Periodic growth parameters viz. plant height and leaf area index increased significantly with
increasing levels of nitrogen up to 125% RD of nitrogen The dry matter accumulation plant-1 was
significantly higher with 150% RD of nitrogen over rest of treatments. Number of sympodial branches
plant-1 were significantly higher at 100% RD of nitrogen level than 75% RD of nitrogen which
remained statistically at par with further increase in nitrogen levels. No. of bolls plant-1, seed cotton
yield plant-1, seed cotton yield hectare-1, stick and biological yield increased significantly with 125%
RD of nitrogen over 100% RD and 75% RD of nitrogen dose. The increase in nitrogen doses increased
the N uptake in plant, seed and total uptake up to 125% RD of nitrogen. Highest gross returns, net
returns and B:C was observed in 125% RD of nitrogen. Different spacing and nitrogen doses had no
significant effect on quality parameters of cotton.
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Keywords
Amla, Fruits, Productivity, Vitamins, Storage, Storage structures, Acidity, Refrigeration, Sampling, Organic acids