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一、地膜棉的需水规律 地膜棉需水包括生理需水和生态需水。生理需水指棉株蒸腾作用与光合作用需要的水分;生态需水指地膜棉生育过程中,棵间蒸发等生活环境所需要的水分。叶面蒸腾和棵间蒸发总量,合称为地膜棉耗水量。 地膜棉各生育阶段的需水量,大体上说:苗期占9％,蕾期占13％,花铃期占56％,吐絮到收获占22％。
First, the demand of cotton membrane Cotton membrane water demand includes physiological water and ecological water needs. Physiological water refers to the transpiration of cotton and photosynthesis required moisture; ecological water refers to the cotton membrane during cotton growth, the evaporation of water and other living environment needs of the water. Leaf transpiration and the total amount of evaporation between trees, collectively known as the cotton membrane water consumption. Cotton water demand during each growth stage, in general: seedling accounted for 9%, buds accounted for 13%, 56% flower ring, boll to harvest 22%.