黑龙江省主要土壤供钾能力及钾肥效应

研究表明，黑龙江省主要土壤养分限制因子是Ｎ、Ｐ、Ｋ其次是Ｓ和Ｚｎ，此外，个别土壤表现缺Ｍｇ、Ｂ和Ｃｕ。在Ｎ、Ｐ、Ｋ及其它中，微量元素平衡施上，明确了钾肥在主要土壤和作物上的增产上的施用技术，为我省平衡施肥提供科学依据。

Power of Potassium Supplying in The Main Kind of Soils in Heilongjian Province and The Effect of Potash on Crops

The results showed that the mainlimiting factors of soil nutrients in the main kind of soil in the Heilongjiang provincewere N,P and K,the second important factors for some kind of soils were S and Zn,sometimesMg,B,and Cu were also deficiency in some special kind of soils.Under the condition ofbalanced fertilization of N,P,K together with some secondary and micronutrients,we havemade the definition of the effect of potash on the crops yield on the main kind of soilsand the technique of fertilization,to supply the scientific evidence for balancedfertilization in the province agricultural production.