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EFFECT OF POLYMER COATED UREA ON GROWTH AND YIELD OF RICE (Oryza sativa L.)

KrishiKosh

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Title EFFECT OF POLYMER COATED UREA ON GROWTH AND YIELD OF RICE (Oryza sativa L.)
 
Creator Rajani Sirvi
 
Contributor Prof. Avijit Sen
 
Subject Rice, polymer coating, growth and yield
 
Description M. Sc. (Ag.)
The present investigation entitled “Effect of polymer coated urea on the growth and yield of rice (Oryza sativa L.)” was conducted during the Kharif season of 2014 at Research Farm,
Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh (India)
Field experiment was laid out in randomized complete block design (RCBD) with five treatments replicated four times. Paddy variety NDR-97 was grown as test crop by adopting a spacing of 15×15 cm2. The soil of the experimental field was Gangetic alluvial and sandy clay loam in texture with pH 7.4, 0.38% organic carbon, 175 kg, 18 kg and 199.6 kg ha-1 of available nitrogen, phosphorus and potassium respectively. A uniform fertilizer dose of 102-60-60 kg N,
P2O5, K2O ha-1 was applied by basal application and deep placement of 2g coated urea a week after transplanting. Observations were recorded on N content of soil at 3 days interval after deep placement and on crop attributes viz. plant height, tiller number, functional leaves, chlorophyll content, yield attributes of rice and yield and nutrient content and uptake by crop.
The negligible or small change in soil N content just after application of polymer coated urea was noticed. However, N content in soil (rate of release) gradually increased with the passage of time and the most delayed release was found with polymer coated urea.
The growth parameters viz. plant height, number of tillers hill-1 and dry matter accumulation of rice were maximum with the deep placed PCU (double layer). Higher chlorophyll content was observed with polymer coated urea than other treatments at all the stages of growth. Significantly improved yield attributes like number of panicles per hill, weight of panicle, grains per panicle and test weight were found with double layer polymer coated urea compare to uncoated urea granule. Grain, straw and total biological yield were found maximum with polymer coated urea (double layer). The maximum uptake of N, P and K by crop was recorded with PCU (double layer) followed by PCU (single layer) and minimum with urea supergranules.
On the basis of results summarized above, it can be concluded that the release rate of nitrogen and soil nitrogen content gradually increased upto 41 days with the application of polymer coated urea. It also has significant effect on growth, development and production on rice crop under puddled condition.
 
Date 2016-09-20T23:52:43Z
2016-09-20T23:52:43Z
2015
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/77846
 
Language en
 
Relation M0034;
 
Format application/pdf
 
Publisher Institute of Agricultural Sciences, Banaras Hindu University