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Effects of mulching amount of barley straw on seedling stand and rice yield in barley/rice relay cropping system



Effects of mulching amount of barley straw on seedling stand and rice yield in barley/rice relay cropping system



RDA Journal of Crop Science 39(2): 15-19



This study was conducted to investigate the effects of mulching amount of barley straw and different flooding depth on rice seedling establishment and rice grain yield in barley/rice relay cropping system. 6kg/10a of rice seed were broadcasted by hand before harvesting at farmer's field, Kimje, Korea. Seedling stand was highest at 0 to 1 cm flooding depth and significantly decreased with deeper flooding depth and with more mulching amount of barley straw. In furrow irrigation, however. seedling stand was higher with increased mulching amount of barley straw. Heading date was delayed with increased mulching amount of barley straw, ranging from 2 to 4 days. Culm length was shorten in double mulching of barley straw, compared with non-mulching or machine transplanting as standard cultivation. Panicle number and spikelet number per square meter were decreased more in barley straw mulching than in machine transplanting but 1,000 grain weight was heavier in barley straw mulching than in machine transplanting. Yield of rice showed nearly the same level in a half or normal mulching compared with machine transplanting and reduced by 5% in one and a half, and in non-mulching. However, in double mulching of barley straw, it was severely reduced by 10% indicating that double mulching induced poor seedling establishment. To obtain the lowest optimum seedling stand, stable panicle number and rice yield potential in a half or normal mulching amount of barley straw accompanied by 3apprx4cm or lower flooding depth is desirable in 6kg/10a seeding amount.

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Accession: 003119679

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