江西赣北棉区近十几年来普遍实行的是油棉两熟制，采取“板地”双移栽，棉地长期得不到翻耕，土壤状况恶化，施用“双效中微肥王”和“天丰生物固氮肥”对油棉两熟棉田土壤改良有较好的效果，且能增 强棉纤维品质，提高产量。 Nearly ten years of Jiangxi’s cotton area in Jiangxi Province have practiced a double-cropping system of oil and cotton, adopting double-transplanting of “planktonic land”, long-term lack of tillage in cotton fields and deterioration of soil conditions. And “Tianfeng Biological Nitrogenous Fertilizer” had better effect on soil improvement of cotton-oil double cropping cotton field, and could enhance cotton fiber quality and increase yield.