Contribution of aquatic tillers to grain yield in deep water rice.
1987
Singh P.K. | Thakur R. | Singh N.B.
Aquatic tillers in deepwater rice can contribute considerably to grain yield, if the water level rises early in the rainy season and peaks 4-8 wk before flowering. To assess the contribution of aquatic tillers to grain yield, floating rices Desaria 8 and Jaladhi 1, deepwater rice Parwapankh, and two cultivation methods - direct seeding the last week of May and transplanting 60-d-old seedlings of first week of Sep 1983 - were studied in a randomized block design with three replications in the BAC [Bihar Agricultural College, India] farm tank. Plot size was 9 x 4 m. More aquatic tillers were formed in transplanted than in direct-seeded rice. Direct-seeded rice suffered along dry spell during early growth and produced more basal tillers. Transplanting was done in 25-30 cm deep water that inhibited production of basal tillers. To compensate, the plants produced greater number of aquatic tillers. Highest average number of aquatic tillers was in transplanted Parwapankh. The longest aquatic tiller (279.7 cm) was in direct seeded Desaria 8, the shortest (61.2 cm) in transplanted Parwapankh. The longest panicle (24.4 cm) was in direct seeded Desaria 8, and the shortest (14.3 cm) in transplanted Desaria 8. Contribution of aquatic tillers to grain yield was highest in transplanted rice.
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