10 kinds of bed conditioners are used to compare their physiological effects on Gossypinm hirsutum L. seeding under condition of nutrient clump. The results are as follows:the optimum formula as basic fertilizer can enhance the rootvigour of cotton seedings, increase the content of chlorophyll, and promote the activity of peroxidase. Meanwhile, it could help bring about the sugarnitrogen ratio and free amino acids to maintain at adequate level in functional leaves, by regulating the intensity of nitrogen and carb...