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Subject: Agronomy × Author: Amandeep × End date: 2005 × Start date: 2005 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Response of rice to N, P & K levels in rice-wheat cropping system on farmer field
    (2005) Amandeep; Rinwa, Ran Singh
    A field experiment was conducted during kharif-2004 on a sandy loam to sandy clay loam soil, low in available nitrogen, high in available phosphorus & potash at farmer’s fields in Karnal and Ambala districts of Haryana state. The experiment consisting of combination of five treatments viz., N0P0K0, N150, N150P60, N150K60 and N150P60K60 kg ha-1 was laid out in RBD design with twelve replications. The experiment was carried out with the objectives of to study the effect of N, P & K on growth, yield & yield attributes, nutrient uptake and their use efficiency in rice including the economics of different treatments & status of soil. The effect on number of hill was not affected by any of fertilizer treatments. The number of tillers increased with the age of crop up to 60 days after transplanting (DAT) and thereafter, slight reduction was recorded at 90 DAT. Dry matter accumulation increased with the advancement of crop stages and maximum increase was observed during 60-90 DAT. The yield and yield attributes were significantly affected by N150 P60 K60 levels. The maximum number of panicles hill-1 and number of spiklets panicle-1 were recorded with the application of NPK. The NPK level produced significantly higher number of grains per panicle and maximum 1000-grain weight was recorded with NPK which was superior over control. Application of N150 P60 K60 fertilizer levels gave significantly higher grain, straw and biological yields at all locations and harvest index was significantly higher at Ambala & in average of sub zone, except at Karnal. The nutrient uptake in grain and straw was highest with NPK levels. The response of N, P & K was in order of N>P>K at N150 P60 K60 levels. The net returns and B:C was higher with application of NPK levels. The O.C. and available N was either maintained or slightly reduced and available P & K declined after harvest of crop from their initial respective status of soil.