棉花是我省主要经济作物之一，种植面积达３５０万亩，主要分布在洞庭湖区，其种植面积占全省的８０％左右。洞庭湖区土壤是长江冲积物及四水尾闾沉积物发育而成的，大部分土壤碱性较强，某些中量元素、微量元素供应不足，影响棉花产量和品质的提高。为此，我们对洞庭湖区... Cotton is one of the main cash crops in our province, planting an area of ​​3.5 million mu, mainly in the Dongting Lake area, its planting area accounts for about 80% of the province. The soil in Dongting Lake area is developed from the sediments of the Yangtze River Sediments and the Lower Reaches of Sanshui. Most of the soils are alkaline and some of the trace elements and trace elements are in short supply, which affects the yield and quality of cotton. To this end, we Dongting Lake District ...