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Effect of integrated nutrient management in rice – green gram cropping sequence under south Gujarat condition

KrishiKosh

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Title Effect of integrated nutrient management in rice – green gram cropping sequence under south Gujarat condition
 
Creator Imade, S.R.
 
Contributor Thanki, J.D.
 
Subject rice, diseases, fertilizers, yields, crops, vegetables, farmyard manure, land resources, planting, nutrients
 
Description The investigation entitled, “Effect of integrated nutrient management in rice – green gram cropping sequence under south Gujarat condition” was conducted during kharif and rabi seasons of 2012-13 and 2013-14 at the Instructional Farm, Navsari Agricultural University, Navsari to study the production potential of rice-green gram cropping sequence under integrated nutrient management system. The soil of the experimental field was clayey in texture, low in organic carbon (0.45%) and available nitrogen (220.80 kg/ha), medium in available phosphorus (40.60 kg/ha) and high in available potash (321.12 kg/ha). The soil was slightly alkaline in reaction (pH 8.0).
The treatment consisted of integrated nutrient management viz., T1 - General RDF (RDF + FYM @ 10 t/ha), T2 - 75% RDN through chemical fertilizer + 25% RDN through biocompost, T3 - 75% RDN through chemical fertilizer + 25% RDN through vermicompost, T4 -75% RDN through chemical fertilizer + 25% RDN through FYM and T5 - control to rice in kharif season as main plot treatments replicated four times in randomized block design. During rabi season each main plot treatment was split into three sub plot treatments with three levels of recommended dose of fertilizers viz., S1 - control, S2 - 50% RDF and S3 - 100% RDF to green gram resulting in fifteen treatment combinations replicated four times in split plot design.
Grain and straw yields as well as most of the growth and yield attributes, quality of rice grain, nutrient content (N, P and K) and their uptake by kharif rice (grain and straw), organic carbon, available nutrient status (NPK) and reduction in bulk density of soil after harvest of the crop were maximum under application of general RDF (RDF + FYM @ 10 t/ha) during both the years of experimentation and pooled results over the years. Application of general RDF (RDF + FYM @ 10 t/ha) recorded highest grain (53.35 q/ha) and straw (77.10) yields of kharif rice. The highest net return ( 17316/ha) with B:C ratio (1.39) were recorded under 75% RDN through chemical fertilizer + 25% RDN through biocompost followed by general RDF (RDF + FYM @ 10 t/ha) with net returns ( 16734/ha) and B:C ratio (1.31).
Similarly, during rabi season the residual effect of general RDF (RDF + FYM @ 10 t/ha) applied to kharif rice showed higher growth, yield attributes, seed and stover yields, quality of seed, nutrient content (N, P and K) and their uptake by green gram (seed and straw) with improvement in soil status (bulk density, organic carbon and available NPK) after harvest of green gram, followed by 75% RDN through chemical fertilizer + 25% RDN through vermicompost during both the years of study and pooled. Among the levels of RDF directly applied to rabi green gram during rabi season, application of 100% RDF resulted in higher values of growth, yield attributes, seed and stover yields, quality of seed, nutrient content (NPK) and its uptake by crop and organic carbon, available NPK with lower bulk density after harvest of crop during individual years and in pooled analysis. The highest net returns ( 17839/ha) and B:C ratio (1.47) were obtained under residual effect of treatment general RDF, followed by 75% RDN through chemical fertilizer + 25% RDN through vermicompost with net returns ( 17029/ha) and B:C ratio (1.44). Among the RDF levels applied to green gram, 100% RDF recorded the highest net returns ( 17720/ha) with maximum B:C ratio of 1.45. The treatment combination T1S3 i.e., general RDF coupled with 100% RDF recorded the highest net returns (23552/ha) and B:C ratio (1.60), followed by treatment combination T3S3 (75% RDN through chemical fertilizer + 25% RDN through vermicompost coupled with 100% RDF) with net returns of 23099 per hectare and B:C ratio 1.59.
The rice-green gram cropping sequence was assessed on the basis of rice equivalent yield, net monetary returns and B:C ratio as well as soil status. In respect of all the above assessment the application of general RDF (RDF + FYM @ 10 t/ha) to kharif rice and 100% RDF to green gram was the most beneficial combination compared to rest of the treatments. However, the interaction differences were not up to the significant extent.
On the basis of experimental results, it can be concluded that for getting higher returns and maintenance of soil health, kharif rice crop should be nourished with general RDF (RDF:100-30-00 kg N-P-K/ha + FYM @ 10 t/ha) or 100 kg nitrogen (75% RDN through chemical fertilizer + 25% RDN through vermicompost) + 30 kg phosphorus per hectare followed by 100% RDF (20-40-00 kg N-P-K/ha) through inorganic fertilizer to rabi green gram in sequence under south Gujarat conditions
 
Date 2016-04-30T15:29:37Z
2016-04-30T15:29:37Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/65693
 
Language en
 
Format application/pdf
 
Publisher NAU