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【目的】研究花铃期不同滴灌量下棉花生长发育特性,为干旱区发展节水高产高效农业提供科学依据。【方法】以新海24号和新海36号为试验材料,灌量设3 900、3 150、2 400 m3/hm2三个水平,试验设6个处理3次重复,品种为副区,进行裂区试验。【结果】同一品种下,出叶速率、主茎日增长量、蕾铃数量、现蕾强度、成铃强度、单株结铃数、单铃重和皮棉产量均以滴灌量3 900 m3/hm2处理较高,3 150 m3/hm2处理次之,2400 m3/hm2处理较低;同一灌量下,新海24号的出叶速率快于新海36号,单株结铃数多于新海36号,其主茎日增长量、蕾铃数量、现蕾强度、成铃强度及单铃重均小于新海36号,新海24号皮棉产量较高。【结论】不同滴灌量主要影响棉花的单株结铃数和单铃重,在滴灌量3 900 m3/hm2下,依据各品种对不同滴水量响应的差异,结合相应的灌溉制度,有利于实现棉花高产。
【Objective】 The objective of this study was to study cotton growth and development under different drip irrigation rates during the flower-boll stage and to provide a scientific basis for the development of a water-saving, high-yield and high-efficiency agriculture in arid areas. 【Method】 With Xinhai 24 and Xinhai 36 as the experimental materials, the irrigation volume was set at 3 900,3 150 and 2 400 m3 / hm2. The experiment consisted of 6 treatments and 3 replications. The cultivars were subarea and split zone test. 【Result】 The results showed that under the same variety, leaf output, main stem daily growth, boll number, budding intensity, boll strength, boll number per plant, boll weight and lint yield were all decreased by 3 900 m3 / hm2 Under the same irrigation, the rate of emergence of Xinhai 24 was faster than that of Xinhai 36, and the number of bolls per plant was more than that of Xinhai No.36, The main stem daily growth, the number of bolls, budding intensity, boll strength and boll weight were less than Xinhai 36, Xinhai 24 lint yield was higher. 【Conclusion】 Different dosages of drip irrigation mainly affect the number of boll bolls per plant and single boll weight of cotton, which is in favor of the corresponding irrigating system based on the differences of response to different drip rates among 3 900 m3 / hm2 drip irrigation High yield cotton.