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EFFECT OF LONG TERM INTEGRATED NUTRIENT MANAGEMENT SYSTEM ON SOIL AND CROP PRODUCTIVITY IN RICE-WHEAT CROP SEQUENCE

KrishiKosh

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Title EFFECT OF LONG TERM INTEGRATED NUTRIENT MANAGEMENT SYSTEM ON SOIL AND CROP PRODUCTIVITY IN RICE-WHEAT CROP SEQUENCE
 
Creator SHARMA, RENU
 
Contributor Sharma, H.L.
 
Subject ##Unable to generate tags tnv_pt_97022.pdf
Rice
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Nutrient management
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Agronomy
 
Description Doctoral Dissertation
ABSTRACT An on-going field experiment entitled, “Effect of long term integrated nutrient management system on soil and crop productivity in rice-wheat crop sequence” was continued at Bhadiarkhar Farm of Department of Agronomy, CSK Himachal Pradesh Krishi Vishvavidyalaya during the year 2005-06 and 2006-07. In this field investigation 12 treatment combinations comprising T1 Control (No fertilizer, no manures to both the crops), T2 (50% NPK to both rice and wheat), T3 (50% NPK to rice and 100% NPK to wheat), T4 (75% NPK to both rice and wheat), T5 (100% NPK to both rice and wheat), T6 (50% NPK + 50% N (FYM) to rice and 100% NPK to wheat), T7 (75% NPK + 25% N (FYM) to rice and 75% NPK to wheat), T8 (50% NPK + 50% N (wheat cut straw) to rice and 100% NPK to wheat), T9 (75% NPK + 25% N (wheat cut straw) to rice and 75% NPK to wheat), T10 (50% NPK + 50% N (green manure) to rice and 100% NPK to wheat), T11 (75% NPK + 25% N (green manure) to rice and 75% NPK to wheat), T12 (Farmers‟ Practice, 40% NPK and FYM 5 t/ha to both the crops) were evaluated in a randomized block design with four replications. The growth parameters of rice and wheat, viz., plant height, dry matter accumulation, number of shoots per metre square, number of leaves per hill at periodic intervals, yield attributes viz., number of panicles of rice and spikes of wheat per metre square, number of spikelets per panicle or grains per spike, 1000-grain weight, and grain and straw yields at maturity stage of the crop were recorded to evaluate the effect of different treatments, besides the soil properties after harvest of each crop season. The growth, development, yield attributes of both rice and wheat was found to be best when 50% N through FYM and 50% NPK to rice and 100% NPK to wheat (T6) was applied during the preceding 16 years. However, this treatment, in general, was as good as the combined use of other organic materials like green manure and wheat cut straw to the extent of 50% N to rice followed by 100% NPK to wheat as well as the application of 100% recommended doses of NPK to both the crops in sequence. Significant decrease in growth and yield of both the crops was recorded due to sub-optimal doses of NPK application to either of the crops. The effect of different treatments on NPK uptake, by the crops followed similar trend as on the yield and yield attributes, maximum being in T6 followed by T8, T7, T10 and T9. After the 16 years of application of different treatments, an appreciable build-up in soil organic carbon content and available P was noticed in all the treatments. In case of available N there was declined from the initial status and in case of available K, there was depletion in control as well as inorganically fertilized plots, while in integrated nutrient management treatment plots it was just maintained. The microbial biomass carbon content was maximum in wheat cut straw treated plots. Productivity trend analysis revealed considerable seasonal variations. The sustainable rice equivalent yield indices due to all the treatments was more than 0.5 revealing that the rice-wheat production system was sustainable with no exception to any of the treatment
 
Date 2016-08-02T12:35:35Z
2016-08-02T12:35:35Z
2009
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/70520
 
Language en
 
Format application/pdf
 
Publisher CSK Himachal Pradesh Krishi Vishvavidyalaya Palampur