Qiang Xiao-Man, Sun Jing-Sheng, Liu Zu-Gui, Song Ni, Wang Feng
Ying Yong Sheng Tai Xue Bao. 2014 Jan;25(1):169-74.
An experiment with girdling applied on the main stem and fruit branch during the early or flourishing stage of flowering and boll-setting was conducted to investigate the effects of different girdling treatments on the growth, yield and water use efficiency (WUE) of cotton. The results showed that compared with the control (CK), leaf area index (LAI) of girdling treatments reduced significantly and the maximum LAI of girdled cotton occurred 5-15 days in advance. Girdling reduced the shedding rate of squares and bolls significantly, and the shedding rate of squares and bolls with girdling applied on the main stem at the flourishing stage was 15.8% lower than that of CK. In contrast with CK, the seed-cotton yield and WUE increased by 24.4% and 26.7% with girdling applied on the main stem at the flourishing stage, and increased by 13.9% and 16.7% with girdling applied on the fruit branch at the early stage, respectively. However, the girdling on the fruit branch at the flourishing stage improved the seed-cotton yield and WUE insignificantly. The seed-cotton yield with girdling on the main stem at the early stage had not significant difference and its WUE reduced slightly compared with CK. It has been concluded that the girdling applied on the main stem at the flourishing stage of flowering and boll-setting could effectively reduce the abscission rate of squares and bolls, improve yield and WUE significantly, and realize the effective unity of high production and water-saving.
在棉花开花结铃的早期或盛期，对主茎和果枝进行环剥处理，以研究不同环剥处理对棉花生长、产量和水分利用效率（WUE）的影响。结果表明，与对照（CK）相比，环剥处理的叶面积指数（LAI）显著降低，环剥棉花的最大叶面积指数提前5 - 15天出现。环剥显著降低了蕾铃脱落率，盛期对主茎进行环剥处理的蕾铃脱落率比CK低15.8%。与CK相比，盛期对主茎进行环剥处理的籽棉产量和WUE分别提高了24.4%和26.7%，早期对果枝进行环剥处理的籽棉产量和WUE分别提高了13.9%和16.7%。然而，盛期对果枝进行环剥处理对籽棉产量和WUE的提高不显著。早期对主茎进行环剥处理的籽棉产量与CK无显著差异，其WUE与CK相比略有降低。研究得出结论，在开花结铃盛期对主茎进行环剥处理可有效降低蕾铃脱落率，显著提高产量和WUE，实现高产与节水的有效统一。
