Effect of Different Cultivation and Management Mode on the Characteristics of Accumulation and Distribution of Dry Matter and the Yield of Winter Wheat after Anthesis

The objectives of this study were to investigate the effects of different cultivation and management modes on the characteristics of accumulation and distribution of dry matter and the yield of winter wheat cultivar Pingan 8 after anthesis,therefore,to suggest a reasonable cultivation and management mode in wheat production in Henan high-yield irrigation areas.The four different cultivation and management modes were conventional management T1,optimizing management T2,super-high-yield management T3 and optimizing management T4.The results showed that similar changing trends in dry matter accumulation among various organs after anthesis.Compared with conventional management T1,the accumulation amount in each vegetative organ after anthesis increased in treatments with T2,T3 and T4;nevertheless,its distribution rate significantly or extremely significantly reduced.The accumulation amount and distribution rate of dry matter in grain significantly or extremely significantly increased in treatments withT2,T3 and T4.The two optimizing managements T2 and T4 obtained high yield by increasing the dry matter assimilation amount and contribution to grainfilling after anthesis,the super-high-yield management T3 could obtain maximum production by improving the accumulation and translocation of dry matter before anthesis,the dry matter assimilation amount and contribution to grain after anthesis.In this study,the super-high-yield management T3 and the two optimizing managements T2 and T4 got high grain weight due to an obvious filling peak at the late-filling-stage 35 d.