Abstract: Two rice cultivars,Shanyou 63(An indica hybrid rice combination)and Yangdao 6(Indica),were used to investigate the physiology activity of rice grain filling cultivated with different methods.The results showed that dry-cultivation exhibited higher chlorophyll content,photosynthesis rate,and activities of superoxide dismutase(SOD),peroxidase(POD)and catalase(CAT)during grain filling,especially at the late filling stage when compared with MC.MDA content inLeaves under dry-cultivation was higher than that under MC.The root activity of dry-cultivation rice decreased rapidly at late grain filling stage.Except MDA,above physiological traits showed the order of MC>DCMS>DCMF>BC,The results suggest that grain yield was higher and rice quality better under DCMS than those under other two dry-cultivation patterns.Reasons for the differences in physiology activity of rice grain filling among DCMS,DCMF and MC were discussed in the paper.

Key words: Rice, Dry-cultivation mulched with straw, Dry-cultivation mulched with film, Physiology activity

CLC Number: 

• S511.01