| Based on randomized block design for single factor,the effect of Jin Nuofeng on flag leaf photosynthesis characters,grain grouting characters and yield of the winter wheat Shaannong 981 was studied.The result showed that spraying Jin Nuofeng on winter wheat in different stages increased the flag leaf photosynthesis rate and grain grouting rate by 14.5%,10.7%,respectively,and enhanced dry matter accumulation in grain by 2.6%,compared with CK;.Spike number,grain number of Spike,and 1 000 grain weight were also increased,but the yield increasing effect of spraying in different stage was different.The best spraying period was in jointing stage,the next was in the anthesis stage,their yield amounted to 6 774.0 kg/hm2 and 6 576.1 kg/hm2,respectively,which were 10.49% and 7.3% more than that of CK,respectively. |