Effects of Rice Seedling Age and Transplanting Density on the Biological Characteristics of Rice

Effects of rice seedling age and transplanting density on the biological characteristics of rice were examined using a rice cultivar,Yangliangyou6,in a field study.When rice seedling age was in the range of 35-55 d and transplanting density was in the range of 1.8×105-3.0×105 hills/ha,leaf area index(LAI) of rice at the mid-tillering stage and panicle initiation stage were decreasing as the increase of rice seedling age,however,increasing as the increase of transplanting density.There were significant differences in productive panicle per m2,total spikelet per panicle,solid spikelet per panicle and yield in the treatments of rice seedling age.Remarkable differences were found in the productive panicle per m2 and yield in the treatments of transplanting density.There was also noticeable effect of interaction between rice seedling age and transplanting density.