Integrated nitrogen management in rice (Oryza sativa) - wheat (Triticum aestivum) cropping system

Sharma, A.R.; Mittra, B.N.

Indian Journal of Agricultural Sciences 62(1): 70-72

1992


ISSN/ISBN: 0019-5022
Accession: 002413904

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Abstract
In a field experiment in 1984-86 at Kharagpur, West Bengal, rice cv. Jaya (in 1984-85) and Ratna (in 1985-86) given 5 t wheat straw, FYM or water hyacinth compost/ha or 800 g Azolla/msuperscript 2 produced mean grain yields of 4.14, 3.82, 3.95 and 4.10 t/ha, respectively, compared with the control yield of 3.74 t. The corresponding grain yields of the following wheat cv. Sonalika crop were 2.00, 1.87, 1.92, 2.03 and 1.8 t. Rice given 0, 30, 60 or 90 kg N/ha produced mean grain yields of 3.11, 3.81, 4.33 and 4.64 t, respectively. The grain yield of the following wheat crop was not affected by previous N application to rice. However, wheat grain yield increased with N rate where the fertilizer was applied directly. N uptake in rice increased with N rate and through supplying it with organic manures.