黑龙江垦区有耕作黑土地800多万亩,集中分布在北安、九三、嫩江、绥化农管局.开垦时间一般都在30年左右。由于多种原因,肥力不断下降。黑土是比较肥沃的土壤,潜在肥力高、土层深厚,有团粒结构、有机质丰富。在不施肥情况下,小麦生产水平在100～150公斤/亩。施化肥后可提 Heilongjiang reclamation area has cultivated more than 80000000 acres of black land, concentrated in Bei’an, 1993, Nenjiang, Suihua Agricultural Authority.Remergence time are generally about 30 years. Fertility is declining for many reasons. Black soil is more fertile soil, potentially high fertility, deep soil, with aggregate structure, organic matter rich. In the case of no fertilization, wheat production levels in the 100 to 150 kg / acre. Fertilizer after mentioning