Arid Zone Research ›› 2019, Vol. 36 ›› Issue (3): 582-588.doi: 10.13866/j.azr.2019.03.07

• Land and Water Resources • Previous Articles     Next Articles

Spatiotemporal Revolution of Soil Salinity in Winter Wheat Fields with Different Years of Drip Irrigation Without Mulching in Arid Area

LI Yuan, GEN Qin-long, LAI Ning, LI Qing-jun, CHEN Shu-huang   

  1. Institute of Soil,Fertilizer and Water-saving Agriculture,Xinjiang Academy of Agricultural Sciences,Urumqi 830091,Xinjiang,China
  • Received:2018-08-01 Revised:2019-01-11 Published:2025-10-18

Abstract: In order to explore the sustainability of drip irrigation for winter wheat planting in arid area,a long-term located experiment was carried out in Qitai County,Xinjiang.Soil samples were collected along a soil profile with different soil depths of 0-80 cm from outward the central area of drip irrigation.Based on the geostatistical analysis,a winter wheat field where drip irrigation had been used for 8 years was selected for researching the distribution of soil salt.The research results showed that:① Soil salinity was in a logarithm normal distribution.The soil salt content was decreased gradually in 0-80 cm soil layer with increasing the years of drip irrigation.After 8 years of drip irrigation,the soil desalinization was obvious in the 0-20 cm rhizosphere.After 6 years of drip irrigation,the soil desalinization was obvious in the 0-60 cm soil layer,and a salt accumulation occurred under this layer;② With increasing the years of drip irrigation,soil salt migrated down to deep soil layer and outward from the central area of drip irrigation;③ With increasing the years of drip irrigation,wheat yield was gradually increased.It was suggested to increase the frequency but decrease the volume of drip irrigation under the current irrigation system.The study results could provide further support for popularizing drip irrigation of winter wheat without mulching.

Key words: winter wheat, without mulch, drip irrigation, soil salinity, arid area, Qitai, Xinjiang