不同抗旱性物质对膜下滴灌水稻抽穗后生育特性及产量的影响

摘要

采用大田随机区组设计,研究了在始穗期喷施抗旱性物质对膜下滴灌水稻生育特性及产量的影响.结果表明,ETDA、CaCl2、FeCl2和5-磺基水杨酸这4种抗旱性物质能有效提高膜下滴灌水稻后期叶绿素含量,增加功能叶叶面积指数;降低叶片丙二醛含量,延缓衰老;增加干物质积累,促进灌浆,增加产量.喷施抗旱性物质的处理产量较对照(喷清水)均有不同程度增产,其中以1 g/L FeCl2的处理增产效果最好.始穗期喷施抗旱性物质使膜下滴灌水稻增产的主要原因是提高了结实率和每穗实粒数.%The effects of different drought resistance materials on growth characters and yield of rice under drip irrigation with film mulch after heading were studied, by randomized block design. The results showed that, the leaf area index and the chlorophyll con-tent were increased,the MDA content was reduced,after using ETDA,CaCl2,FeCl2and 5-salicylic in initial heading stage. Compared with the control, the yield of drought resistance materials treatment were increased, among them, the yield-increasing effect of 1g/L FeCl2treatment was the best.The main cause of the yield increase was the seed setting rate and filled grains improved.