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(一)根据地形情况与棉花生长过程,做好田间工程,适时适量的进行灌溉。首先,由于棉花分布面积广,地形条件不同,其灌溉方法也有不同,在冲塝田,水源条件好,最适宜沟灌。灌溉效果的好坏与田间渠道布置有关。一般是:“驼背田抽腰沟,沟深宜2市尺,田田有围沟,上下串沟斜开口”。腰沟自流灌溉面积大,吃水均匀,排灌迅速;沟不宜过深过平,以免水流缓慢停滞,深水引起地下水受涝;斜向开缺口,水流迂回、保土、保肥,不致损伤棉花发育。放水原则“自上而下、等高齐润,淹墒边、留墒面”。特别注意不能大水漫灌。其次,按照棉花发育生长过程,适量灌水。苗期
(A) according to the topography and the cotton growth process, good field engineering, timely and appropriate irrigation. First of all, due to the wide area of cotton distribution, different topographical conditions, the irrigation methods are also different. In Chonghuo Field, the water conditions are good and the furrow irrigation is most suitable. The effect of irrigation is related to the arrangement of field channels. General is: “camel field pumping waist ditch, ditch deep should be 2 feet, Tian Tian Wai ditch, up and down the chamfer oblique openings.” Gully runoff irrigation area, uniform draft, rapid irrigation and drainage; ditch should not be too deep and flat, so as to avoid slow stagnation of water, deep water caused by groundwater flood; oblique open gap, water circuitous, earth, fertilizer, cotton will not damage the development. Shui Shui principle “from top to bottom, contour Qi Run, flooded edge, leaving moisture surface.” Special attention can not flood irrigation. Second, in accordance with the cotton growth process, appropriate irrigation. Seedling