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Suresh Naik K.P.,University of Agricultural science | Suresh Naik K.P.,Organic Farming Research Center | Krishnamurthy N.,University of Agricultural science | Ramachandra C.,University of Agricultural science | Ramachandra C.,Zonal Agricultural Research Station
Indian Journal of Agronomy | Year: 2015

A field experiment was conducted during the rainy seasons of 2012 and 2013 at Zonal Agricultural Research Station, Mandya, to study the sources of nutrient on yield, methane emission, and water productivity of rice (Oryza sativa L.) under different methods of cultivation. Among the different methods of rice cultivation, system of rice intensification (SRI) method recorded higher water productivity (54.3 kg/ha-cm) than aerobic method (46.6 kg/hacm) and conventional method (29.9 kg/ha-cm) and resulted to the higher grain and straw yields of rice (8.55 and 10.07 t/ha) than the other methods of rice cultivation like conventional (7.05 and 8.38 t/ha) and aerobic method (6.48 and 7.83 t/ha). Among the sources of nutrients, application of recommended dose of fertilizer (100% N through neem-coated urea) recorded higher grain and straw yields (8.49 and 9.83 t/ha) over the other sources of nutrients, whereas the aerobic method of rice cultivation recorded lower methane emission (3.95 mg/plant/day) and total methane production (24.2 kg/ha) than SRI method (4.42 mg/plant/day and 28.1 kg/ha) and conventional method (6.25 mg/plant/day and 80.7 kg/ha) 90 days after sowing (DAS). Among the sources of nutrients, application of recommended dose of fertilizer (100% neem coated urea) recorded significantly lesser methane emission (4.35 mg/plant/day) and total methane production (37.9 kg/ha) than the other sources of nutrients but higher methane emission and production resulted by application of 50% N through paddy straw incorporation + 50% N through urea + recommended dose of P and K (5.56 mg/plant/day and 50.5 kg/ha) 90 days after sowing. © 2015, Indian Society of Agronomy. All rights reserved. Source


Naik K.P.S.,Organic Farming Research Center | Krishnamurthy N.,UAS | Ramachandra C.,UAS | Hareesh G.R.,AICRP on Weed Control | And 2 more authors.
Research on Crops | Year: 2015

A field experiment was conducted during kharif seasons of 2012 and 2013 at Zonal Agricultural Research Station, Mandya to study the effect of sources of nutrients on productivity, profitability and nutrient uptake of rice (Oryza sativa L.) under different methods of cultivation. The experiment was laid out in a split plot design with three different methods of rice cultivation as main plot i. e. conventional method, system of rice intensification (SRI) and aerobic method and sub-plot treatment as five sources of nutrients including both organic sources and inorganic sources and replicated thrice. Among the different methods of rice cultivation, aerobic method of rice cultivation recorded significantly lower methane emission (3.95 mg/plant/day) and total methane production (24.21 kg/ha) as compared to SRI method (4.42 mg/plant/day and 28.07 kg/ha) and conventional method (6.25 mg/plant/day and 80.68 kg/ha) at 90 days after sowing. Among sources of nutrients, application of RDF (100% neem coated urea) recorded significantly lesser methane emission (4.35 mg/plant/day) and total methane production (37.93 kg/ha) compared to other sources of nutrients but higher methane emission and production resulted by application of 50% N through paddy straw incorporation+50% N through urea+Rec. P & K (5.56 mg/plant/day and 50.45 kg/ha) at 90 DAS. Significantly higher water productivity recorded in SRI method of rice cultivation (54.37 kg/hacm) compared to conventional method (46.64 kg/ha) and aerobic method of rice cultivation (29.91 kg/ha-cm). Among sources of nutrients, RDF (100% neem coated urea) recorded significantly higher water productivity (50.40 kg/ha-cm) compared to other sources of nutrients but lower water productivity was recorded by application of 50% N through paddy straw incorporation+50% N through urea+Rec. P & K (36.30 kg/ha-cm). Source


Sunil C.,Organic Farming Research Center | Puttaiah E.T.,Gulbarga University | Somashekharappa P.R.,Organic Farming Research Center
Plant Archives | Year: 2012

Sugarcane pressmud is one of the important agro-industrial wastes available in India as well as Karnataka. About 2.736 million tones of pressmud is produced annually, which can serve as a vast store house of macro and micro nutrients apart from causing environmental pollution in the dumping yards of the sugar factories. An attempt is made in this study to evaluate different methods of composting with or without microbial culture. Results of this study indicates that among the different methods of composting studied NADEP method of composting with inoculants and enrichment has recorded significantly superior nutrient composition of 1.50±0.19, 1.00±0.91 and 0.83±0.05 percent nitrogen, phosphorus and potassium as compared to pit method of composting without any inoculation or enrichment. NADEP method was closely followed by Japan method of composting with inoculation and enrichment. Source


Sunil C.,Organic Farming Research Center | Puttaiah E.T.,Gulbarga University | Somashekharappa P.R.,Organic Farming Research Center | Khan H.S.I.,Organic Farming Research Center
Plant Archives | Year: 2012

Composting is one of the cheapest methods of utilizing the agro-industrial wastes to reduce pollution. Population dynamics of microbes during the process of composting changes with time and it is an indication of compost maturity. Composting of pressmud takes very long time as compared to other wastes as it contains very wide C:N ratio. Hence, attempts are needed to study the dynamics of microorganisms while composting. In this direction, an attempt is made in this study to know the changes in the population dynamics of microbes as influenced by different methods of composting with or without microbial culture. Results of this study indicates that there is progressive increase in the population of actinomycetes, N-fixers and Psoulblisers up to 60 days after composting and there is decreasing trend after 60 days after composting. Irrespective of the stages of composting higher number of actinomycetes, N-fixers and P-soulblisers were recorded in the NADEP method of composting with addition of compost culture as well as with enrichment followed by Japan method of composting with enrichment and inoculation. Source


Asif M.,Organic Farming Research Center | Lone S.,University of Pune | Baba Z.A.,Organic Farming Research Center
Ecology, Environment and Conservation | Year: 2014

This paper investigates the impact of bio-fertilizers on nutrient uptake of blue pine seedlings under nursery conditions. The experiment was tested under Completely Randomised Design with three replications which comprised of two nitrogen fixing bio-fertilizers viz; Azotobacter sp, Azospirillum sp, two phosphorus solubilizing bacteria's viz; Pseudomonas fluorescens, Bacillus subtillis and two ecto-mycorrhizal fungi viz; Pisolithus tinctorius, Laccaria laccata and control. The research findings show that the various biofertilizers enhanced the plant nutrient status viz; N, P, K, Ca and Mg significantly than control. Further, the two ectomycorrhizae viz; Pisolithus tinctorius and Laccaria laccata used in the studies proved superior over rest of the inoculants and control. It was followed by Azotobacter sp, Azospirillum sp, Pseudomonas fluorescens and Bacillus subtillis respectively. Therefore, it can be concluded from the study that the application of biofertilizers at nursery stage improve the nutrient uptake and growth of blue pine plants. Copyright © EM International. Source

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