南疆阿拉尔垦区海岛棉耗水规律研究

Study on the Water Consumption Characteristic of Alar Areas in South Xinjiang

通过对7个海岛棉品种土壤水分动态变化分析研究,结果表明,不同品种各生育期土壤含水量、土壤蓄水量存在极显著差异。所有品种土壤含水量在不同土层的变化趋势基本一致,呈现出"Z"字型的规律性变化。即随土层深度的增加,土壤含水量逐渐减少,80-100 cm土层土壤含水量又升高。含水量最高的土层是0-20 cm,最低的土层是60-80 cm。这种规律性变化与棉花生长特点、根系的发育特点以及吸收特点有关。534I、Z181、新海21是节水型品种,能够较充分利用有限的灌溉水,在干旱半干旱地区具有强大的优势。

Through studying on the dynamic change of soil water of 7 sea island cotton, the results show that there are distinct differences in soil water content and soil water storage among different varieties. The soil water content of all varieties has common change,they have ＂Z＂ change. Soil water content decreses with the depth increase. The layer of the most high soil water content is 0-20 cm, while the most lower layer is 60-80 cm. This rule change related with root. 534, IZ181 and New sea 21 are varieties which can save water and use limited irrigation water,so they have advantage of power in arid and semi-arid area.