不同灌溉量对长绒棉产量的影响

Effects of Different Irrigation Volumes on Cotton Yield in Arid Areas

通过在新疆阿瓦提县的田间试验，研究了不同灌溉量对长绒棉产量及蕾铃脱落的影响，并对棉花产量进行了方差分析及多重比较。结果表明：长绒棉产量达到最高时的灌水量为5900～6000m^3／hm^2，灌溉量过少或过多，都对棉花的结蕾铃造成影响。所以，只有灌溉量达到适宜水平，同时能够及时补充水分，蕾铃脱落才相对较低。

After carrying out the field experiments, in this study the yield of long stapled cotton and the bud-boll falling-off rates of cotton plants under surface irrigation with different volumes, i. e. , W1 = 2 400 m^3/hm^2, W2 = 3 600 m^3/hm^2, W3 =4 800 m^3/hm^2, W4 =6 000 m^3/hm^2 and W5 =7 200 m^3/hm^2 in 15 districts, are researched, and the experiments were repeated three times. Moreover, the variance analysis and the multiple comparison of cotton yield and the bud-boll falling-off rate of cotton plants under surface irrigation with different volumes are carried out. The results show that the irrigation volume varies in a range of 5 900 - 6 000 m^3/hm^2 when the yield of long stapled cotton is the highest, and the bud-boll falling-off rate of cotton plants is high under surface irrigation with too high or too low volume. Therefore, irrigation with suitable volume is very important for decreasing bud-boll falling-off rate of cotton plants and increasing cotton yield. In Aksu region in south Xinjiang, for example, the budboll falling-off rate of cotton plants is the lowest and the cotton yield is the highest when irrigation volume varies in a range of 5 900 -6 000 m^3/hm^2.