Anushri Singh
Department of Agronomy, College of Agriculture, Indira Gandhi KrishiVishwavidyalaya,
Raipur, 492-006 (C.G.)
Abstract: The experiment was conducted during kharifseason of 2010 at Instructional Cum Research Farm IGKV Raipur to investigate the “Effect of CPE Based Irrigation Schedules and Nutrient Management Practices On Aerobic Rice.” The 24 treatment combinations consisted of 3 CPE based irrigation schedules i.e. @ 150% CPE, @ 100% CPE and @ 75% CPE and 8 nutrient management practices i.e. N0 P60 K100, N60 P60 K100, N120 P60 K100, N180 P60 K100, N120 P30 P100, N120 P0 K100, N120 P60 K50 and N120 P60 K0. The split plot design was followed with 3 replications having CPE based irrigation schedules as main plot treatment and nutrient management practices as sub plot treatment. A medium duration high yielding rice variety Mahamaya was taken as a test crop. The CPE based irrigation schedules did not influence significantly the growth parameters i.e plant height, No. of tillers, leaf area, dry matter accumulation and SPAD value. The growth parameters found to be equally effective under all irrigation schedules. Moreover effective tillers, grains panicle-1, test weight, sterility per cent and yields of grain and straw remained at par under all the irrigation schedules. The nutrient management practices significantly affected the growth, yield and nutrient concentration and uptake of rice. The application of N180P60K100, significantly increased the plant height, No. of tillers, leaf area, dry matter accumulation ,SPAD value at all the growth stages as compared to treatments of N0P60K100, N120P0K100 and N120 P60K0. The nutrients levels of N120P60K50 and N120P60K100 produced comparable plant height, No. of tillers, at all the growth stages to that of N180P60K100. These nutrient levels also found to equally effective for increasing yield components, grain yield, N, P and K concentration in grain and straw. The uptake of these nutrients also increased at aforesaid levels of nutrients. The increase in yield was mainly associated with significant increase in number of leaves, leaf area and dry matter accumulation.
Keywords: Aerobic rice, cumulative pan evaporation, irrigation schedules, nutrient, growth parameter, yield.
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