| Cite this article: | 余轩.,刘浩,马岩川.,等.麦后移栽棉适宜调亏灌溉模式研究[J].灌溉排水学报,0,():-. |
| yuxuan,liuhao,mayanchuan,et al.麦后移栽棉适宜调亏灌溉模式研究[J].灌溉排水学报,0,():-. |
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| Study on the suitable regulated deficit irrigation mode for cotton transplanted after winter wheat harvest |
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yuxuan,liuhao,mayanchuan,et al
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Farmland Irrigation Research Institute
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| Abstract: |
| In order to explore the suitable regulated deficit irrigation mode for cotton transplanted after winter wheat harvest, different water deficit irrigation treatments were designed at the cotton bud stage, and blossoming and boll-forming stage. The effects of different regulated deficit irrigation treatments on the cotton growth, yield, quality, as well as the water utilization efficiency were investigated. The results showed that the water deficit would inhibit the cotton height and the stem thickness in both stages. The effects at the bud stage were larger than those at the blossoming and boll-forming stage. However, slight water deficit irrigation had no obvious effect on the growth and development of cotton for any stage. The relative water content of leaves showed a downward trend with the increase of water shortage. Mild deficit irrigation provoked the accumulation of dry matter on the ground in both stages. Compared with the full irrigation (CK2) treatment during the whole growth period, the mild regulated deficit irrigation can save irrigation water by 5.45%, increase the yield by 9.16%, and increase the water utilization efficiency by 15.05% at the bud stage, and it can save irrigation water by 27.27% , increase production by 2.35%, and increase water utilization efficiency by 40.86% at the blossoming and boll-forming stage. Regulated deficit irrigation had no obvious effect on the cotton micronaire value and elongation efficiency. However, lightly regulated deficit irrigation at the bud or blossoming and boll-forming stages had a tendency to increase fiber length, uniformity, and breaking strength in the cotton. In summary, when the water supply is relatively sufficient, light-regulated deficit irrigation at the bud stage and full irrigation at the blossoming and boll-forming stage can provide the highest seed cotton yield and water utilization efficiency. In the case of insufficient water resources, sufficient Irrigation at the bud stage and mild-regulated deficit irrigation during the flowering and boll period are suitable for water saving, water utilization efficiency, and a high cotton yield. |
| Key words: after wheat transplanting cotton; drip irrigation; seed cotton yield; fiber quality; irrigation water utilization efficiency |
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