| Based on the soil nutrient systematic approach,11 soil nutrients of 4 major farmlands in the chilling and humid region of high-elevation of Gansu were analyzed in laboratory,tested through absorption experiment,and diagnosed with potted planting in greenhouse.The result shows:the deficit degree is N>P>Zn>S on Haplic Kastanzens of Bianpo,N>P>K>S>Mn>Zn on Haplic Kastanzens of Hemajia,P>N>B>Mo>K>S on Calcaric Cambisois soil,N>P>Cu>Mo>S on Cumulic Anthrosois siol,the other nutrient elements can meet the needs of crops.This method can be well used to evaluate soil nutrient state,quickly to determine the limited factors and deficit degree of soil nutrient. |