“九二○”是一种植物生长调节剂，它能促进植物细胞的伸长，在杂交水稻制种、柑桔保花保果方面普遍应用。近年，湖南省棉区一些棉农将“九二○”作为一项高产配套技术，应用于棉花生产，获得了较好的效果。为了进一步探讨棉花施用“九二○”的效果，为大面积推广提供依据... “920” is a plant growth regulator, which can promote the elongation of plant cells in hybrid rice seedlings, citrus flowers and fruit preservation applications generally. In recent years, some cotton farmers in the cotton area of ​​Hunan Province have used “920” as a high-yielding supporting technology for cotton production and obtained good results. In order to further explore the cotton application “nine two ○” effect, provide a basis for large-scale promotion ...