The lower limits of soil moisture for rational deficit irrigation scheduling to cotton at its different growth stages are 55％～60％, 65％, 70％ and 50％～55％ of field capacity at seedling, buds ,bolls and wadding stages, respectively.
The lower limits of soil moisture for rational deficit irrigation scheduling to cotton at its different growth stages are 55％～60％, 65％, 70％ and 50％～55％ of field capacity at seedling, buds ,bolls and wadding stages, respectively.
合理的棉花调亏灌溉制度是苗期控制水分供应，土壤含水量维持在田间持水量的55％～60％；蕾期和花铃期是棉花的需水关键期，土壤含水量应分别保持在田间持水量的65％和70％左右；吐絮期应控制水分供应，土壤含水量维持在田间持水量的50％～55％。