短日处理对感光型杂交稻组合性状的影响

Effects of short day length treatment on major traits of photosensitive hybrid rice combination

以感温组合为对照,对7个感光型杂交水稻组合进行了人工短日和自然短日处理,结果显示,南宁感光型杂交水稻组合在人工短日处理下,能缩短生育期30d左右;而在自然短日下,能缩短生育期60d左右。遮光处理一般能使植株变矮,增加感光组合的单株有效穗,使每穗总粒数减少;自然短日能使主茎叶片数减少,结实率有所提高。

Thermosensitive hybrids used as check, seven photosensitive rice hybrids were treated with artificial short day length （ASDL） and natural short day length （NSDL） in this study. The results showed that growth duration of the photosensitive rice hybrids could be shortened about 30 days and 60 days under ASDL and NSDL treatment in Nanning, respectively. The photosensitive rice hybrid treated with ASDL, plant height and total grains per panicle were decreased while effective panicle per plant was increased. Treated with NSDL, the total leave number of main culm was declined and seed setting rate was increased.