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›› 2015, Vol. 38 ›› Issue (5): 968-975.

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Response Characteristics between Drip Irrigation Cotton ABA in the Blooming Period and Field Capacity of 20cm Soil Layer under the Different Conditions of Nitrogen Fertilizers

ZHANG Jian-xin1, YANG Xiu-chun2, HE Jiang-yong1   

  1. 1. Institute of Irrigation and Water Conservancy and Soil and Fertilizer of Xinjiang Academy of Agricultural and Reclamation Sciences, Shihezi 832000, Xinjiang, China;
    2. Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Received:2015-01-04 Revised:2015-04-08 Online:2015-09-25

Abstract: The drop irrigation potting experiments were adopted to study the response analysis between drip irrigation cotton's ABA concentration and field capacity of 20 cm soil layer under the condition of different N fertilizer levels in the bud stage and blooming period, and the results showed that under the condition of pure N including N2g, N4g or N6g per plant in the bud stage, the comparison of relative coefficients(r) between ABA content and field capacity of 20 cm soil layer are -0.946, -0.917, -0.966, respectively; the significant levels of P by T test are 0.015, 0.029, 0.007, respectively; and its model fitting determination coefficients(R2) are 0.977, 0.852, 0.934, respectively. The comparison of relative coefficients(r) between ABA content and field capacity of 20 cm soil layer in the blooming period are -0.788, -0.959, -0.861, respectively; and its model fitting determination coefficients(R2) are 0.737, 0.937, 0.872, respectively. Therefore, under the condition of pure N with N2g, N4g and N6g per plant in the bud stage, the correlation between potting drip irrigation cotton's ABA content and field capacity of 20 cm soil layer is negative, the correlation of N6g per plant reaches the significant level, and the processing model fitting determination coefficient(R2) of N6g per plant reaches the very significant level, and its model is logarithm. In the blooming period, the correlation between ABA content and field capacity of 20 cm soil layer is negative, the correlation of N4g per plant reaches the significant level, and the model fitting determination coefficient(R2) of N4g per plant reaches the very significant level, and its model is index. The regression model studied in this paper well reflects the evapotranspiration and water requirement characteristic of drip irrigation cotton, providing the new calculation method and scientific evidence for the evaluation of the water consumption of agriculture drip irrigation cotton well in the inland oasis of arid areas.

Key words: Drip irrigation, potting, cotton, ABA, field capacity

CLC Number: 

  • S275.6