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Integrated rice straw–urea management for transplanted rice

Published online by Cambridge University Press:  27 March 2009

A. V. Bulbule ,
S. C. Talashilkar  and
N. K. Savant
A. V. Bulbule
Affiliation:
National Agricultural Research Project, Mahatma Phule Agricultural University, Igatpuri, 422 403, Maharashtra State, India
S. C. Talashilkar
Affiliation:
Konkan Krishi Vidyapeeth, Dapoli, 412 715, Maharashtra State, India
N. K. Savant
Affiliation:
International Fertilizer Development Center, Muscle Shoals, Alabama 35662, USA
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Summary

Four field experiments were conducted over the 1992 and 1993 seasons (southwest monsoon seasons, June–October) in the warm subhumid tropical region on the west coast of the Maharashtra State, India. The objective was to investigate the effect of recycling limited amounts of rice straw (RS) (as a source of K and Si) integrated with the use of prilled urea (PU) and urea briquettes (UB) at 60 kg N/ha on the growth and yield of rainfed transplanted rice (Oryza sativa L.). The management practice, consisting of basal incorporation of RS (2 t/ha) integrated with deep placement of UB (one 2·1-g UB/4 hills) immediately after transplanting using a modified 20 × 20 cm spacing, produced a significantly higher grain yield (average increase of 1·3 t/ha) and straw yield (average increase of 1·1 t/ha) than did the RS practice integrated with two equal split applications of PU at the same N rate and hill spacing. The additional yields were attributed to the increase of total and productive tillers/m2 and panicle weight. The results indicate the potential of the integrated RS–UB management for increasing yields of rainfed transplanted rice in the warm subhumid tropical zone.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 127 , Issue 1 , August 1996 , pp. 49 - 55
Copyright
Copyright © Cambridge University Press 1996

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