Total productivity, nitrogen, phosphorus and potassium removal and economics of rice (Oryza sativa) -wheat (Triticum aestivum) cropping system with integrated nitrogen management in rice

Patro, H.; Mahapatra, B.S.; Sharma, G.L.; Ajay Kumar

Indian Journal of Agronomy 50(2): 94-97

2005


ISSN/ISBN: 0537-197X
Accession: 004486657

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Abstract
A field experiment was conducted during 2000-01 and 2001-02 in Pantnagar, Uttaranchal, India, to evaluate the effect of 5 organic sources of nutrients (Sesbania cannabina, sunn hemp and cowpea green manuring; wheat straw incorporation; and no-organic management (fallow)) along with 4 levels of N (0, 60, 120 and 180 kg/ha) to rice and 3 levels of N (0, 75 and 150 kg/ha) to wheat on the total productivity, nutrient removal and economics of rice (cv. Pant Dhan)-wheat (cv. UP 2338) system. Integrated use of S. cannabina green manure and 180 kg N/ha recorded 7.1 tonnes rice grain/ha and subsequent application of 150 kg N/ha to succeeding wheat crop yielded 6.0 tonnes wheat grain/ha, thus giving a total production of 13.1 tonnes/ha from the rice-wheat sequence. At this production level and fertilizer use, rice removed 136.7, 24.2 and 165.1 kg N, P and K/ha and the respective values for wheat were 107.8, 20.0 and 124.7 kg/ha, making a total removal of 578.5 kg nutrients (NPK ha-1 annum-1) from the rice-wheat system. The same treatment also recorded the highest, net return and benefit:cost ratio in the system.