自1974年以来,我们搞了棉花高产栽培试验,采用营养钵育苗,每亩留苗密度为2,500—3,000株,亩产皮棉由1974年的243.3斤递增到1979年的293斤。在丰产栽培过程中,我们初步掌握了稀植高产棉花各生育期的长势长相及诊断指标。 Since 1974, we have engaged in high-yielding cotton cultivation experiments using nutrient bowl seedlings with a density of 2,500-3,000 per acre. The lint yield per mu has risen from 243.3 kg in 1974 to 293 kg in 1979. In the process of high yielding cultivation, we initially grasped the growing status and diagnostic indexes of each growing period of the sparsely planted and high yielding cotton.