The Growth Characteristics of Single-Cropping Rice in Different Combinations of Irrigation and Fertilization

Through field experiment,we compared the influences of different combinations of irrigation and fertilization on the tiller,root growth,the leaf area index,yield,and water productivity of single-cropping rice.The aim of this study was to explore the mechanism of water conservation and yield increasing of single-cropping rice.The results show that the tiller of rice under water-saving irrigation(thin layer and dry irrigation or alternate dry and wetting) is better than conventional irrigation,and the tiller of three-split fertilization is better than that of two-split;the root length and total root hair are greater than conventional irrigation;the influence of different irrigation on the leaf area index is not significant,but the yield of water-saving irrigation and three-split fertilization is greater than conventional treatment,with yield increment of 10~30 kg/mu.Besides,water-saving irrigation can improve water productivity significantly,and save 10%~30% of irrigation water during growing stages.