褐稻虱和纹枯病复合危害对水稻生理活动的影响

EFFECT OF BROWN PLANTHOPPER AND SHEATH BLIGHT INFECTION ON THE PHYSIOLOGICAL ACTIVITIES OF RICE

本试验利用盆栽水稻,研究了水稻纹枯病(Rhizoclonia solani)及褐稻虱(Nilapsrvala lugens)复合危害对水稻生理活动的影响,试验结果表明,不同生育期,水稻受害株的叶绿素含量、光合强度,根系活力等发生了很大的变化。其中,水稻孕穗期对危害的敏感性最强,因而,这一时期是病虫防治的关键时期。通过对水稻受害生理的研究,明确了8月中旬,杂交稻根外施肥,尤其是增施硅肥、钾肥是控害的一项重要栽培措施。

The physiological responses of rice to brown planthoppcr(BPH) and sheath blight(SHB)were studied on potted rice plant. The results showed that a series of physiological activities of rice damaged by SHB and BPH changed significantly at the different stage of growth. such as, the rice photosynthesis, the contens of chlorophyll, and the root activity of infested rice, etc.. The susceptibility to injury in booting stag was the most in the any other stage of growth. It is cleared that broadcast additional fertilizer is one of the important measure of controlling pest at Augest on the hybrid rice, especially broadcast potassium and silica fertilizer.