不同灌水方式对水稻籽粒灌浆特性的影响

选用杂交水稻冈优527、D优363和汕优63为材料,应用Richards方程对四种灌水方式的籽粒灌浆过程进行拟合,研究了水稻的灌浆特性的差异。结果表明:湿润灌溉与"湿、晒、浅、间"灌溉方式(简称C处理)两种灌水方式由于强弱势粒在整个灌浆期内的灌浆速率较高,有利于籽粒的灌浆和充实,提高了结实率和千粒重,因而其产量较高;而旱种下强弱势粒在整个灌浆期内的灌浆速率低,从而影响其籽粒尤其是弱势粒的灌浆,降低了结实率和千粒重,从而导致减产。

Effects of Different Irrigation Methods on the Grain-filling Properties of Paddy Rice

The grain-filling properties of three paddy rice of Gangyou 527,Dyou 363 and Shanyou 63 under four different irrigation methods were fitted by Richards growth equation to study the differences in grain-filling properties.The results indicated that,compared with submerged irrigation,damp irrigation and the treatment C(controlled damp irrigation before booting stage,rational irrigation at booting stage,wetting-drying alternation irrigation from heading stage to mature stage) had higher grain-filling rate,and were favorable to grain-filling and the enhancement of seed setting rate,1000-grain weight and grain yield.But dry cultivation had lower grain-filling rate that had a negative effect on grain-filling,especially weak potential grain-filling.Dry cultivation decreased seed setting rate and 1000-grain weight,which led to low grain yield.