锌在土壤中的含量及其应用

本文综合分析了我国土壤锌的含量和分布特点,指出我国长江以北地区存在大面积缺锌土壤,土壤有效锌含量多数<1,00ppm.较详细地论述了河南土壤锌的含量和地理分布规律,查明全省有六千万亩耕地严重缺锌,三千万亩耕地潜在缺锌.并介绍了土壤中锌的各种形态和锌肥的施用技术,通过在缺锌土壤上对玉米、水稻、棉花、小麦和果树等施用锌肥试验,均有一定的增产效果.

ZINC CONTENT IN SOILS AND ITS APPLICATINS

There are large areas of zinc-deficient soils in the regions to the north of the Yangzi River.The contents of available zinc in soil are genrally under 1.00PPm in he areas.In this paper the zinc contents and its geographical distributions in Henan are disclosed.There are 60 million mu of cultivated land are severely zinc deflicient and 30 million mu potenially deficient. The forms of zinc in soils and the techniqne its applicatiou are discussed.The yields of cotton plaut, rice, eorn, wheat and fruit trees, ect. can be increased by using zinc fertil Ber.