凉山州水、旱作对陆稻产量的影响

Effects of Water-cultivation and Dry-cultivation on the Yield of Upland Rice in Liangshan

通过水、旱作对陆稻产量影响的研究,结果表明:陆稻在水作条件下生育期缩短,但灌浆时间经旱作延长1～8天,株高、最高苗、有效穗、穗粒数和产量明显高于旱作;成穗率、结实率和千粒重因品种略有高或低的差异;陆稻旱作时应增加播种量和提高移栽密度才能取得较好的产量;旱稻502、旱稻297和旱稻277适应于无充分水源保障的地区种植。

The effects of water-cultivation and dry-cultivation on the yield of Upland rice were studied. The result indicated that,under water-cultivation,the growing period of Upland rice became shorter,but the grain filling time of Upland rice was prolonged from 1 to 8 days under dry-cultivation. The plant height,highest seedling, effective panicle,grain number per spike and yield of water-cultivation were obviously higher than those of dry-cultivation. The effective spike rate of tiller,seed setting rate and 1000-grain weight were different slightly high or low with different varieties. Therefore,under dry-cultivation,only increasing the seeding rate and transplanting density of Upland rice can achieve high yield. Upland rice of 502,297 and 277 were suitable for the areas deficient of water.