[Weed control on direct seeded lowland rice in rice fish pattern]
1999
Ridwan (Balai Penelitian Tanaman Pangan, Sukarami (Indonesia))
Weeds in direct seeded system is major constraint in lowland rice. Without weed control yield loses more than in transplanting system. Rice and fish pattern and herbicide application is an alternative to weed control in direct seeding lowland rice. The experiment was conducted in irrigated lowland area Sungai Beringin Payakumbuh, West Sumatra in the planting season 1996/1997. The experiment was designed in a split plot design with four replications. The treatments were rice planting in rice and fish pattern (rice planting before and after fish culture) as the first factor and application of herbicide (Butachlor, Metasulfuron methyl, Bensulfuron methyl and hand weeding) as the second factor. Objective of the experiment were to observe the effect of rice and fish pattern and application of herbicide on weed, plant growth and yield of direct seeding rice. The results showed that rice and fish pattern was effective to reduce weed growth in direct seeded rice. Application of three herbicides had the same effective to weed control in direct seeding rice, but their effectivity lower than hand weeding. Direct seeding rice after fish culture increase the number of panicle/square m and yield of rice. Before fish culture, yield of rice was 5.59 t/ha and after fish culture increased up to 6.48 t/ha (990 kgs/ha). Weed control by hand weeding gave the highest number of panicle/square m and yield 6.80 t/ha among treatments
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