Effects of Fertilizer Amount on Dry Matter Accumulation and Distribution of Wheat Cultivar BN AK-58

Wheat cultivar BN AK-58 was used to study the laws of dry-matter accumulation and allocation.The results showed that dry matter accumulation of grain presented a linear upward trend basically.The dry-matter accumulation of above-ground part presented an S-type curve.There was positive correlation between dry matter accumulation of grain and above-ground part.The transport rate and contribution rate to seed of each organ above ground were different,the order of transport being leaf stem sheath and the order of dry-matter accumulation being stem leaf sheath.The decrease of nitrogen amount could increase the dry-matter weight of grain for fertilizer treatment A and B.For treatment C,the dry-matter accumulation of above ground part and grain decreased distinctly after 40th days of flowering,so its economic yield and biological yield were lower than other two treatments.In the yield level of A to B,fertilization had significant effects on dry-matter accumulation of above-ground part and grain.The dry-matter accumulation increased with increasing soil fertility.The fertilizer application treatment C1 was the best for fully exploiting the yield potentiality of BN AK-58.