National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692 Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Field studies were conducted for two consecutive years (2014-15 and 2015-16) in sandy clay loam soils of Regional Agricultural Research Station, Chintapalli of Andhra Pradesh to study the nitrogen uptake and soil fertility changes in rice-based cropping systems under various nitrogen management practices employed to rice. The first season (kharif) experiment was laid out in randomized block design replicated thrice comprising seven nitrogen management practices to rice viz., T1) FN100; T2) FN125; T3) FN150; T4) FN100+FYM25; T5) FN125+FYM25; T6) FN100+BGA and T7) FN100+GM. Each of the treatment plots of kharif was subdivided into six plots during rabi to accommodate three crops viz., wheat, rajmash and mustard crops with two fertilizer schedules (F1-50% RDF and F2-100% RDF) in split plot design. From the two years study, it is indicated that the nitrogen uptake by rabi crops under the residual influence of N management practices to kharif rice was higher with wheat crop and the residual effect of different N management practices significantly influenced the post-harvest soil available nitrogen, phosphorus and potassium after rabi crops during both the years of study. The highest soil available nitrogen, phosphorus and potassium after rabi crops were registered with the residual effect of N supplied to kharif rice through FN100 + GM during both the years of study. Among the three rabi crops rajmash left the soil fertility status at higher level than mustard and wheat, which in turn maintained clear disparity between them in rice-based cropping system in high altitude region of Andhra Pradesh.
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