水分调控对机采棉土壤水盐运移的影响.

[Objective】The present paper aimed to study the effects of different moisture treatments on soil water and salt changes and yield of mechanically harvested cotton during boll stage. ' Method (The experimental plot was used in the key laboratory test base of modem water¬saving irrigation corpus of Shihezi university and the water-saving irrigation test station of Shihezi university. Three water gradients were set up by pit test method, and each treatment was repeated three times. At the end of each growth period, the indexes of soil water content, soil salt content and yield were determined, and the effects of diferent water treatments on soil water and salt change and yield of mechanically har¬ vested cotton were analyzed. ' Result】 The results showed that in W2 (the lower limit of bud period was 60 ' , the lower limit of flowering and boiling period was 70 ' ), the water holding capacity of 0 - 60 cmsoil layer in the root layer of water treatment could reach 63. 28 ', which was suitable for crop growth. The range and the salt leaching effect were ideal, forming a desalting desalination zone, and the cotton field yield wa 5482.38 kghm2 , which wa 12.07 ' -30.39 ' higher than otlier treatments, and the water use efficiency wa 1.30 kgm3, which wa also the best. ' Conclusion 】The effects of different water treatments on the change of water and salt and cotton yield were significant, water treatment of W2 (lower limit of bud stage was 60 lower limit of flowering and boll stage was 70 ') was a more reasonable water control strategy [ABSTRACT FROM AUTHOR]