慈谿县常年降雨量在1,400毫米左右,雨量虽充沛,但全年分布不很均匀。一股在霉季、秋季正当棉花苗期和吐絮期,阴湿多雨;入伏后在棉花花花铃期则高温干旱。以两量分布和棉花需水规律相对照,苗期和吐絮期需水少而降雨多,主要应解决排水问题;花铃期营养生长和生殖生长均很旺盛,又值高温,生理、生态需水均较多,但正遇伏旱,因此,花铃期的 Cixi annual rainfall of about 1,400 mm, although the rainfall is abundant, but the annual distribution is not uniform. One in the mildew, the fall of cotton seedling and boll weighed properly, wet and rainy; after the influx of cotton flowers in bolting period is a high temperature and drought. Compared with the regular pattern of water requirement of cotton, seedlings and bollwings need less rainfall but more precipitation, which should mainly solve the problem of drainage. Both the vegetative and reproductive growth during flowering and boll stage are very vigorous, and they are high temperature, physiological and ecological needs Water is more, but the case of volt drought, therefore, flower-ring period