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 |
Soil Test Crop Response studies involving Integrated Plant Nutrition System (STCR - IPNS) were conducted on a Typic Haplustalf of Tamil Nadu, Southern India for developing fertiliser prescriptions for desired yield targets of rice- rice sequence under System of Rice Intensification (SRI). By adopting the Inductive cum Targeted yield model, variations in soil fertility with reference to soil available nitrogen (N), phosphorus (P) and potassium (K) were established and test crop experiment was conducted with rice-rice sequence. The findings pertaining to rabi season is discussed in this paper. From the field experimental data, nutrient requirement (NR), contribution of nutrients from soil (Cs), fertilizer (Cf) and farmyard manure (Cfym) were computed. The nutrient requirement for producing one quintal of rice grain yield was worked out as 1.50 kg of N, 0.68 kg of P2O5 and 1.97 kg of K2O. The contributions of available N, P2O5 and K2O towards total N, P and K uptake by rice from soil and fertilizer were 16.14, 38.40, 16.57 and 35.70, 33.17, 60.17 per cent respectively while the contribution from manure was 24.24, 9.52 and 33.89 per cent respectively. The estimated per cent contribution of N, P2O5 and K2O from FYM (Cfym) was using the basic parameters, fertiliser prescription equations were developed for rabi season and ready reckoner of fertiliser doses were formulated. The contribution of FYM@12.5 t ha-1 when applied along with recommended doses of NP&K fertilisers was found to be 40, 20 and 32 kg ha-1 of fertiliser N, P2O5 and K2O respectively.
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