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麦棉两熟是我国粮棉主产区一项成熟的种植制度,以改良3:1式为主体的麦棉两熟双高产栽培模式,实现了麦棉产量的新突破。但麦棉共生期复合群体地上部光竞争和地下部营养竞争影响了棉花营养状况和干物质的累积,导致棉花弱苗晚发、晚熟劣质。因此麦棉两熟双高产条件下研究棉花养分积累与干物质累积规律及营养特点,为制定合理施肥制度,改善棉花生育状况,提高产
The double cropping of wheat and cotton is a mature planting system in the main producing areas of grain and cotton in our country. The double cropping double high yielding cultivation mode based on improved 3: 1 is the main breakthrough. However, the competition of above-ground light and nutrition competition in underground part of the symbiotic composite wheat-wheat affected the nutrition status of cotton and the accumulation of dry matter, which led to the late onset and late-ripening of inferior cotton. Therefore, under the conditions of double yielding and high yield of wheat and cotton, the law of nutrient accumulation and accumulation of dry matter in cotton was studied. In order to formulate a reasonable fertilization system, improve the cotton reproductive status,