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系统报道了棉花生长后期对叶片营养进行综合诊断的有关参数（Ｎ／Ｐ，Ｎ／Ｋ，Ｋ／Ｐ，ＮＰ，ＮＫ，ＰＫ），经田间施肥试验及示范推广，其准确度达９２％，具有较大的可靠性，可与棉花优化测土施肥结合进行，在生长后期进行叶片营养综合诊断使用。
The system reported the relevant parameters (N / P, N / K, K / P, NP, NK and PK) for the comprehensive diagnosis of leaf nutrition in the later stage of cotton growth. The accuracy of the test was 92% With greater reliability, it can be combined with cotton to optimize soil testing and fertilization, and used in the comprehensive diagnosis of leaf nutrition at the later stage of growth.