Enhancing yield and nitrogen use efficiency in maize-wheat system under conservation agriculture

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dc.contributor.advisorGupta, R. K.
dc.contributor.authorOpinder Singh
dc.date.accessioned2017-04-27T10:01:14Z
dc.date.available2017-04-27T10:01:14Z
dc.date.issued2017
dc.description.abstractThe present study ''Enhancing yield and nitrogen use efficiency in maize-wheat system under conservation agriculture'' was carried out at research farm of Borlaug Institute for South Asia (BISA), Ladowal (Ludhiana), during Rabi and Kharif seasons of 2013-14 and 2014-15 on sandy loam soil. In experiment-I, grain yield of wheat and maize was significantly higher under DIPBMB+R as compared to DIPB-R which in turn was significantly better than FIPB-R during both the years. In maize the per cent increase in grain yield was 27.05 and 23.40 under DIPBMB+R, and 22.13 and 19.80 per cent under DIPB+R over that of FIPB-R during the year 2014 and 2015, respectively. However in wheat there was approximately 16.09 and 15.22 per cent increase in yield with drip irrigation along with residue retention as compared to furrow irrigation without residue retention in both the years, respectively. The yield and yield attributes of wheat and maize under NE was on par with RN100%, but was significantly higher from RN75%. However, the yield and yield attributes of wheat and maize of RN100% and RN75% were on par with each other, thereby saving 25% of fertilizer in both the crops. In experiment-II significantly higher grain and straw yield of maize and wheat was recorded in the residue retained plots i.e. FIRB+R as compared to the residue removed plots i.e. FIRB-R during both years, respectively. Maize yield under residue retained treatments showed significant increases of 7.10 and 8.41 per cent in yield compared to residue removed treatments in 2014 and 2015, respectively. Wheat yield obtained from residue retained treatments showed significant increase of 4.41 and 4.06 per cent compared to residue removed treatments in 2014 and 2015, respectively. The top placement of fertilizer was significantly better than furrow application and broadcasting in terms of grain and straw yield, nitrogen uptake at different growth stages and nitrogen use efficiency. In experiment-III, throughout the decomposition cycle, the per cent decrease in weight was significantly higher from the subsurface placed residue as compared to surface placed residue. Type of residue and method of placement had a strong influence on releasing behavior of N, P and K. In sub-surface placed residue total N, P and K released at the end of decomposition period was more in ML50% (31.66 kg N ha-1, 2.91 kg P ha-1 and 56.12 kg K ha-1) as compare to MT50% (21.6 kg N ha-1, 1.62 kg P ha-1and 46.22 kg K ha-1), respectively. Similarly in wheat and moongbean residues N, P and K release was higher in sub-surface placed residue as compared to surface placed residue throughout the decomposition period irrespective of type of residue.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810010219
dc.keywordsMaize-Wheat system, conservation agriculture, nitrogen, residue management, drip irrigationen_US
dc.language.isoenen_US
dc.pages209en_US
dc.publisherPunjab Agricultural University, Ludhianaen_US
dc.research.problemEnhancing yield and nitrogen use efficiency in maize-wheat system under conservation agricultureen_US
dc.subSoil Scienceen_US
dc.thememaize-wheat systemen_US
dc.these.typePh.Den_US
dc.titleEnhancing yield and nitrogen use efficiency in maize-wheat system under conservation agricultureen_US
dc.typeThesisen_US
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