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我国缺锌低产的耕地土壤面积约2.5亿亩,南方低产田缺锌更为突出。而目前施用锌肥面积仅为缺锌总面积的1/6。本文通过在常德、桃源等10多个市、县近50万亩稻田实施锌肥区域开发的多点试验和示范,对常德地区中低产田的缺锌状况和施用锌肥的技术和经济效果有了比较全面的了解,其结果将为南方大面积的缺锌中低产田的改良提供可供借鉴的经验和依据。
China’s zinc deficiency and low yields of about 250 million acres of arable land, zinc deficiency in low-yielding fields more prominent. The current zinc fertilizer area is only 1/6 of the total zinc deficiency. In this paper, Changde, Taoyuan more than 10 cities and counties in nearly 500000 acres of paddy fields to carry out multi-point zinc zone development and demonstration of zinc deficiency in middle and low yield fields in Changde, the technical and economic effects of zinc fertilizer A more comprehensive understanding of the results will provide a large area for the South zinc deficiency in the improvement of low-yield fields to provide lessons for reference and experience.