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棉花的田间需水量,在国内外曾进行了不少研究,一般认为,每亩需水量在300—600立方米。而各生育期需水量又有不同,总趋势是前期少,中期多,后期又少。为了进一步探索棉花丰产的需水量,给棉田灌溉捉供依据,我们于1972年在商丘县五里杨大队对棉花生育期需水量进行了试验。一、试验情况丰产田为上砂下粘蒙金地(50厘米以上为两合土,60—70厘米有一层粘土)。容重1.34,地势平坦,肥力中等,有灌溉条件,地下水位常年在3米以下。(注:棉花生长期
Cotton field water demand, at home and abroad have conducted a lot of research, generally believed that water demand per mu in the 300-600 cubic meters. However, the water demand in different growth periods is different, and the general trend is less in the early period, more in the middle period and less in the latter period. In order to further explore the demand for high-yielding cotton and to provide a basis for irrigation in cotton fields, we conducted a test on the water requirement of cotton during the growth period in 1972 in Wuliyang Brigade, Shangqiu County. First, the test conditions High yielding fields for the sand under the sticky Mongolia (more than 50 cm for the two co-60-70 cm layer of clay). Bulk density 1.34, flat, medium fertility, irrigation conditions, perennial water table below 3 meters. (Note: Cotton growth period