对浙江省浦江县作物养分限制因子的TechnoGIN分析

Analysis of cropnutrition limiting factors by TechnoGIN in Pujiang County of Zh ejiang Province

用TechnoGIN计算浙江省浦江县作物养分限制因子时发现,按目前农业技术水平,要实现一定的目标产量,在养分投入一致,不同土地单元同一土地利用类型养分过剩率并不相同;不同作物在同一土地单元养分过剩量也各不相同.一般经济作物比粮食作物的养分过剩率相对较大,旱作作物则相对表现养分不足.不同土地利用类型氮的淋溶和挥发量也可以通过TechnoGIN进行计算,其结果可以对环境进行评判.因此TechnoGIN不仅是计算作物养分利用的一个有效工具.它的结果对指导农业生产和进行环境保护也有一定的参考价值.

This article describes how to use TechnoGIN to calculate crop nutrition limiting factors and to realize target yield in Pujiang county. At the present agricultural level of china, the same crop on different land units may suffer different degrees of nutrient excess and different farm crops on the same land unit may also experience different degrees of nourishment surplus. Such surplus is more severe in the cash crop than in food crops, with respect to the dry-land crops, most lands are deficient in nutrient. The degree of nitrogen leaching and vaporization by the crop in different types of land use can be calculated by using TechnoGIN. It is concluded that TechnoGIN is an efficient tool for calculating the nourishment gain and loss of crops, The result can be used to guide the agricultural production and protection of environment.