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GrainGenes Reference Report: IJA-74-385

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Reference	IJA-74-385
Title	Effect of nitrogen on productivity, soil fertility and economics of rice ( Oryza sativa )-potato ( Solanum tuberosum )-wheat ( Triticum aestivum ) cropping system
Journal	Indian Journal of Agricultural Sciences
Year	2004
Volume	74
Pages	385-387
Author	Singh SP Kushwah VS Lal SS
Abstract	A field experiment was conducted on rice-potato-wheat system in Gwalior, Madhya Pradesh, India, during 2001/02 and 2002/03 to study the effect of varying N rates on productivity and soil fertility. The treatments comprised 2 rice cultivars (IR 64 and Mahamaya) and 3 rates of N fertilizer (80, 100 and 120 kg/ha) to rice. In the succeeding potato crop, the recommended rate of 180 kg N, 34.9 kg P and 100 kg K/ha was applied. In the succeeding wheat crop, only 120 kg N/ha was applied. There were significant higher number of tillers per hill and panicles per hill for IR 64, whereas plant height, number of filled grains per panicle and 1000-grain weight were higher with Mahamaya. The highest grain yield (7.37 tonnes) was recorded with Mahamaya supplemented with 120 kg N/ha. There were significantly higher plant height and tubers per plant under treatments where potato was planted after IR 64 compared to potatoes planted after Mahamaya. The residual effect of N applied to rice on potato crop was at par. The highest tuber yield (29.5 t/ha) was recorded in potato planted after harvest of IR 64 supplemented with 100 kg N/ha. The highest wheat-equivalent yield, production efficiency and net returns in rice--potato-wheat sequence were recorded with IR 64 supplemented with 100 kg N, 17.5 kg P and 25.0 kg K/ha, potato with 180 kg N, 34.9 kg P and 100 kg K, and wheat with only 120 kg N/ha under rice-potato-wheat system. The reduction in available soil P and K was initially observed in the treatment where IR 64 was supplemented with 100 kg N/ha after 2 years
Keyword	[ Hide all but 1 of 25 ] application rates crop yield cropping systems cultivar economics fertility nitrogen nitrogen fertilizer panicles phosphorus fertilizers plant height potassium fertilizers potatoes productivity reduction residual effects returns rice seedweight sequential cropping soil soil fertility tillers tuber varietal reactions

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