Effect of Preceding Crops and Nitrogen Rates on Post Harvest Attributes Of Winter Hybrid Maize (Zea Mays L)

Keyword: Preceding crop, nitrogen rates, summer legumes, crop sequence, yield attributes.

Abstract: A field experiment was conducted at Agronomy research farm of IAAS, Rampur, chitwan, Nepal during summer and winter season 2010 and 2011 to study the effect of crop sequence and nitrogen rates on hybrid maize. There were thirty treatment combination consisting of six crop sequences, maize-maize, fallow-maize, greengram-maize, cowpea-maize, blackgram-maize, clusterbean-maize in main plots and five nitrogen rates 0, 50, 100, 150, 200 kg/ha in subplots with three replication.The research finding revealed that grain yield of maize was higher after summer legumes than after maize, fallow and clusterbean. Maximum grain yield of maize (4840 kg/ha in 2010 and 5230 kg/ha in 2011) was recorded under greengram-maize sequence followed by cowpea-maize, whereas the lowest grain yield was noted under maize-maize during both the years. Grain yield recorded with 200kg N/ha was maximum (6250 kg/ha in 2010 and 6548 kg/ha in 2011) while lowest yield (2296 kg/ha in 2010 and 2570 kg/ha in 2011) was under no nitrogen application. Maximum cob diameter (3.72 cm in 2010 and 3.85 cm in 2011) was recorded under greengram-maize sequence and it was minimum under maize-maize sequence. Cob diameter was maximum (3.78 cm in 2010 and 3.99 cm in 2011) with 200 kg N/ha while it was minimum at no nitrogen application. Cob length noted under cowpea-maize sequence was maximum (12.2 cm in 2010 and 12.8 cm in 2011) which was comparable to greengram – maize. While cob length was minimum under maize-maize sequences. Maximum cob length (12.5 cm in 2010 and 13.3 in 2011) was recorded with 200 kg N/ha and it was minimum under control. Maximum grain number per cob (334.6 in 2010 and 338.5 in 2011) was noted under greengram– maize sequences and minimum under fallow – maize in 2010 and under maize – maize in 2011. Grain number per cob was maximum 359.0 in 2010 and 364.0 in 2011 ) noted with 200 kg N/ha while it was minimum with no nitrogen during both the years . Maximum grain weight per cob (64. 5 g in 2010 and 65 .9 g in 2011) was recorded under cowpea– maize sequences which was comparable to greengram– maize sequences, while it was minimum under maize– maize. Grain weight per cob was maximum (80.0 g in 2010 and 82.0 g in 2011) recorded with 200 kg N/ha and it was minimum under no nitrogen application.Maximum 1000 grain weight (191.5 g in 2010 and 193.0 g in 2011) was recorded under greengram– maize sequence. While it was minimum under maize-maize sequence. 1000 grain weight was maximum (206.5 g in 2010 and 208 .0 g in 2011) with 200 kg N/ha and it was minimum with no nitrogen application. Stover yield was maximum (10504 kg/ha in 2010 and 11050 kg /ha in 2011) under greengram – maize sequences while it was minimum under maize– maize sequences. Maximum Stover yield (11922 kg /ha in 2010 and 12700 kg /ha in 2011) was recorded with 200 kg N/ha while it was minimum with no nitrogen application.

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B.P. Yadav, D. N.Yadav, K.B. Koirala, K.R. Pandey , R.B.Thapa et al."Effect of Preceding Crops and Nitrogen Rates on Post Harvest Attributes Of Winter Hybrid Maize (Zea Mays L)". International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878),vol 1, no. 1, 2016, pp.45-53 AI Publications

B.P. Yadav, D. N.Yadav, K.B. Koirala, K.R. Pandey , R.B.Thapa, P.(2016).Effect of Preceding Crops and Nitrogen Rates on Post Harvest Attributes Of Winter Hybrid Maize (Zea Mays L). International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878).1(1), 45-53

B.P. Yadav, D. N.Yadav, K.B. Koirala, K.R. Pandey , R.B.Thapa, P.(2016).Effect of Preceding Crops and Nitrogen Rates on Post Harvest Attributes Of Winter Hybrid Maize (Zea Mays L). International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878).1(1), pp.45-53.

B.P. Yadav, D. N.Yadav, K.B. Koirala, K.R. Pandey , R.B.Thapa. 2016."Effect of Preceding Crops and Nitrogen Rates on Post Harvest Attributes Of Winter Hybrid Maize (Zea Mays L)". International Journal of Environment Agriculture and Biotechnology(ISSN: 2456-1878).1(1):45-53.

B.P. Yadav, D. N.Yadav, K.B. Koirala, K.R. Pandey , R.B.Thapa."Effect of Preceding Crops and Nitrogen Rates on Post Harvest Attributes Of Winter Hybrid Maize (Zea Mays L)", International Journal of Environment Agriculture and Biotechnology,vol.1,no. 1, pp.45-53,2016.

@article { b.p.yadav2016effect,
title={Effect of Preceding Crops and Nitrogen Rates on Post Harvest Attributes Of Winter Hybrid Maize (Zea Mays L)},
author={B.P. Yadav, D. N.Yadav, K.B. Koirala, K.R. Pandey , R.B.Thapa , R},
journal={International Journal of Environment Agriculture and Biotechnology},
volume={1},
year= {2016} ,
}