Effects of Water Management Method on Yield and Rice Planthopper Occurrence of Double-Cropping Rice
LIU Yuwu
ZHUO Le
CHENG Zhouqi
QIU Lin
LI Youzhi
TU Naimei
YI Zhenxie
Abstract：Hengyang local main varieties(early rice:Xiangzaoxian 45;late rice:Taiyou 553)were used as materials to carry out field experiments,and the effects of different water management methods(W1:flooding irrigation;W2:intermittent irrigation;W3:wet irrigation)on the yield and rice planthopper occurrence of double-cropping rice were studied,so as to clarify the water management method that is conducive to the stable yield of rice in central and southern Hunan and can effectively prevent and control the occurrence of rice planthopper,and lay a foundation for the construction of sustainable prevention and control technology system of rice planthopper.The results showed that in 2022,the yield of early rice of W2 treatment was significantly higher than those of W3 and W1 treatments,and the yields of late rice of W2 and W3 treatments were significantly higher than that of W1 treatment.The difference between W2 and W3 treatments was not significant,and the main reason for the difference in yield was the number of effective panicles.In 2023,the yields of early and late rice of W3 treatment were higher than those of W1 and W2 treatments,and the main reason for the difference in yield was seed setting rate.Water management method had a significant effect on the rice planthopper occurrence of early and late rice,especially in the peak period.In general,the order of rice planthopper number was W1>W2>W3,and W3 treatment was significantly lower than W1 and W2 treatments.In 2022,the rice planthopper number of late rice of W3 treatment decreased by 15.4%and 28.6%compared with W2 and W1 treatments,and decreased by 35.2%and 40.6%in whole 2023.The results of correlation analysis showed that rice planthopper number at most growth stages was significantly or extremely significantly positively correlated with the relative humidity at the base,the water content of the leaf sheath,and the peroxidase(POD)activity of the leaf sheath.In summary,wet irrigation can reduce the occurrence of rice planthoppers by reducing the relative humidity at the base of rice population and the water content of leaf sheath,and ensure higher yield of rice,which is an ideal water management method.
Keywords：Double-cropping riceWater management methodYieldRice planthopperField microclimate
Publication Date：2025-07-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 98-106 )