Study On The Effect Of Irrigation Frequency Of Drip Irrigation Under Mulch Of Cotton

[Objective] :To explore the film drip irrigation cotton under different growth period of shihezi land reclamation area the influence of different irrigation frequency on the growth and development, Drip irrigation under membrane cotton under different irrigation frequency after analyzing the characteristics of water consumption and irrigation system research, Aims to reveal the different irrigation frequency under the condition of film with drip irrigation of cotton growth such as regularity, and then establish cotton water consumption under the conditions of different irrigation frequency and irrigation system, For the region to develop film with drip irrigation cotton irrigation decision-making to provide basic data.[Methods]: By setting different irrigation frequency compared with conventional control irrigation experiment, Study film drip irrigation cotton under different irrigation frequency influence on cotton growth and development, so as to determine the film drip irrigation cotton high yield under irrigation frequency.[Conclusion]: Cotton production factor will increase with the increase of irrigation frequency. The boll number per plant increased from 5.12±0.31 to 5.51±0.45,Single boll weight increased from 4.31±0.39 g to 4.63±0.22 g, different irrigation frequency on the lint effect is not significant. In the same climate, under different irrigation quota of irrigation frequency processing and control are 5400 m3.hm-2; Whole growth duration irrigation frequency set to control treatments for eight times, frequency conversion treatment for 18 times, secondly, 12 times, dealing with three to 10 times. By respectively for treatment one, treatment two, treatment three and a contrast test, cotton seedling water demand is less, about 2.0 mm.d-1, to cotton growth anaphase plant growth metabolism slows, demand decreases, water consumption of about 3.4 mm.d-1 At the same time, through the comprehensive analysis of test data, processing the production of cotton in obtaining the highest at the same time, the utilization rate of water in the soil was close to the highest, so on the basis of sufficient irrigation, film with drip irrigation for cotton irrigation frequency system: seedling stage, irrigation quota set for 550 m3.hm-2, number 1 times; bud stage, the irrigation quota set to 600 m3.hm-2, the number 2 times; the blooming period, irrigation quota set to 210 m3.hm-2, time interval is 3 d, the number 13; Cheng Ling late period, irrigation quota set to 550 m3.hm-2, number 1 times; Late in the blooming, irrigation water is set to 370 m3.hm-2, number 1 times. So the whole growth period total irrigation water is 5400 m3.hm-2, total irrigation frequency 18 times.