关键词:  土壤养分资源, 土壤—作物系统, 养分转化, 运移, 吸收, 利用效率

Abstract:

Abstract The problem of exploiting the potentialities of the soil nutrients is discussed in this paper. Theregime of the resources of soil nutrient elements in China is analyzed. The questions and the ways in promoting the effective transform and transfer of the soil nutrient elements in the soil-plant system are expounded.The importance of enhancing the systematic study of the effective transform, transfer, uptake and use effi-ciency of soil nutrients by using the theories and means of thermodynamics and dynamics, and of coordinatingthe relation of supply and uptake (and utilization) of nutrients from two sidessoils and cropsare emphasized.

Key words: Soil nutrient resources Soil-crop system Transform of nutrients transfer UptakeUse efficiency