因地制宜,合理密植是棉花增产的一项有效措施。但在南方棉区一到梅雨季节,如果水肥碰头,密植棉株往往出现“上窜”、“疯长”,导致株高节稀,枝叶重叠,封行过早,影响通风透光,造成早期蕾铃大量脱落,长成“高、大、空”,起不到密植增产的效果,甚至反而减产。为了探索使用廉阶高效的生长调节剂矮壮素以控制棉株疯长,矮化株型,协调个体发育与群体发育、营养生长与生殖生长的关系,我们从一九七九年开始,连续三年进行了矮壮素浸种试验。现 According to local conditions, reasonable density planting cotton is an effective measure to increase production. However, in the southern cotton region to the rainy season, if the fertilizer and water meet, dense cotton plants often appear “up channeling” and “soaring”, leading to plant section dilute, foliage overlap, premature closure, affecting the ventilation, resulting in early bud A large number of bells off, grow into “high, big and empty”, can not achieve the effect of intensive planting and yield increase, or even cut. In order to explore the use of low-efficient and efficient growth regulator chlormezuron to control cotton plants soaring, dwarf plant type, to coordinate the relationship between individual development and population development, vegetative growth and reproductive growth, we from 1979 onwards, three consecutive Year of the CCC seed soaking test. Now