Studies on green house gas emissions and carbon sequestration under conservation agriculture in maize based cropping systems

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dc.contributor.advisorNanwal, R.K.
dc.contributor.authorParihar, Muli Devi
dc.date.accessioned2017-06-03T03:52:48Z
dc.date.available2017-06-03T03:52:48Z
dc.date.issued2014
dc.description.abstractThe experiment was carried out at the Research Farm, Directorate of Maize Research Pusa New Delhi for two consecutive kharif seasons of 2012-13 and 2013-14. The field was laid out in a split plot design with three replications. Six conservation tillage practices viz. PB-WR, PB-WOR, ZT-WR, ZTWOR, CT-WR and CT-WOR were taken in the main plots and two cropping system viz. maize-wheat and maize-chickpea in subplots. All growth parameters viz. Plant height, dry matter accumulation, LAI, CGR, RGR and NAR were significantly affected by conservation tillage practices. The growth parameters of maize did not influenced due to cropping system. Yield attributes of maize such as cobs/m2 and grains/cob were significantly influenced by conservation tillage practices. Similarly, yield attributes of wheat and chickpea were also significantly influenced. ZT-WR registered 22.4, 20.0 and 18.5 %; 24.3, 12.8 and 14.4% increase in grain, stover and biological yields during 2012 and 2013, respectively. The highest system productivity was realized under ZT-WR (9.97 and 11.13 t/ha) followed by PB-WR (9.65 and 10.65 t/ha) during 2012-13 and 2013-14, respectively. Cropping system did not have a significant effect on growth, yield and soil properties. The maximum gross (132.39 x 103 and 165.14 x 103 /ha) and net returns (87.19 x 103 and 117.03 x 103 /ha) were recorded under ZT-WR practice while, maximum B:C ratio was recorded under ZT-WOR (1.98 and 2.53) during both the years. The maximum C input was estimated under CT-WR whereas maximum C-output and CSI were under ZT-WR. Physical properties like BD, hydraulic conductivity, soil aggregation and infiltration rate were optimum under ZT-WR. Minimum GHGs (CO2 and N2O) emission from soil was recorded in maize followed by chickpea and wheat. Significant highest total CO2 emission in maize- wheat/chickpea cropping system was estimated under CT-WR and minimum under ZT-WOR. Whereas, maximum N2O-N emission was under CT-WOR and minimum under PB-WR.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810014603
dc.language.isoenen_US
dc.publisherCCSHAUen_US
dc.subAgronomy
dc.subjecttillage, crops, wheats, yields, irrigation, conservation tillage, grain, maize, planting, productivityen_US
dc.these.typePh.D
dc.titleStudies on green house gas emissions and carbon sequestration under conservation agriculture in maize based cropping systemsen_US
dc.typeThesisen_US
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