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一、农业中的微量元素资源在农业生态系统中,作物生长发育所需的微量元素主要来自以下方面:土壤养分库中贮存的部分,以肥料(包括有机肥料和无机肥料)和农药形式输入系统中的部分,随降雨、灌溉水进入系统的部分。土壤是农业生态系统中微量元素最大贮存库。根据我国土壤微量元素平均含量,以每公顷225万千克土计,我国1.35亿公顷耕地耕层贮存的硼(B)1876万吨、锌(Zn)2897万
1. Trace Elements Resources in Agriculture In agriculture, the trace elements needed for crop growth and development mainly come from the following aspects: The parts stored in the soil nutrient pool are input into the system by means of fertilizers (including organic fertilizers and inorganic fertilizers) and pesticides In the part, with rain, irrigation water into the system part. Soil is the largest repository of trace elements in agricultural ecosystems. According to the average content of soil trace elements in our country, with 2.25 million kg of soil per hectare, 18.76 million tons of boron (B), 28.97 million tons of zinc (Zn)