Effect of Root Cutting on Photosynthesis Characteristic and Dry Matter Accumulation of Rice

Taking Song-122 as experimental material,based on field micro-plot experiment,the effects of root cutting on photosynthesis characteristic and dry matter accumulation of rice were discussed.The treatments were cutting off the whole root,root length with 0.5,1.0,1.5,2.0 cm and with the whole root.The results showed that chlorophyll content during the growing period and photosynthesis characteristic in filling period were not declined when root of rice was cut before transplantation,and it was not concerned in the cutting length.There was no effect on dry matter accumulation and yield when root length was longer than 1 cm before transplantation,otherwise,dry matter accumulation and yield were decreased significantly.