Effects of Different Irrigation Volumes on Cotton Yield in Arid Areas
Pan Li · Arid Zone Research · 2008
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 m3/hm2,W2=3 600 m3/hm2,W3=4 800 m3/hm2,W4=6 000 m3/hm2 and W5=7 200 m3/hm2 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 m3/hm2 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 bud-boll 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 m3/hm2.