Author(s):

Sanjay Kumar and JP Srivastava

Abstract: The investigation involved the effect of organic and inorganic nutrients sources on rice to estimate their response on plant growth parameters of rice. In This study carried out in randomized block design with rice variety HUR105 having three replication and seven treatments i.e., (Control; NPK 00:00:00) T1, (Recommended Dose of Fertilizer: RDF; NPK 150:60:60)T2, (RDF+S:Zn:B 40:05:1.5) T3,(Customized fertilizer of Tata Chemical having N:P:K:Zn:B: 11:32:13:0.9:0.24% @ 375 kg ha^-1+179.34 kg ha^-1 urea in splits) T4, (75% RDF +25% N through sewage sludge) T5, (75% RDF + 25% N through vermicompost) T6, (75% RDF +25% N through sesbenia (GM)) T7.Plants under treatments T3 and T4 having higher response on growth parameter viz. relative growth rate (RGR), net assimilation rate (NAR), leaf area index (LAI), crop growth rate (CGR) of rice during 2014-15 and 2015-16. Improvements were more in treatments which were provided with inorganic nutrients, that too when these were supplemented with S, Zn and B. Customized fertilizer of Tata Chemical (T4) was also effective in improving these parameters, but to a lesser magnitude than T3. It was evident that for optimal growth of rice in rice-wheat cropping system application of S, Zn and B @ 40:05:1.5 kg ha^-1 for rice is essential. Replacements of 25% inorganic nitrogen by sewage sludge, vermicompost, and sesbania also improved studied growth parameters, and in all these treatments values of studied parameters were at par, but lower than those treatments which received only inorganic sources of nutrients (T2, T3 and T4).Specific leaf weight (SLW) under different applied nutrient levels, as compared to control, decreased; and indicated that added fertilizers (organic as well as inorganic) increased leaf area per unit dry matter of the leaf.

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