Acta Agriculturae Boreali-Sinica ›› 2024, Vol. 39 ›› Issue (S1): 150-158. doi: 10.7668/hbnxb.20194830

Special Issue: Soil fertilizer Saline-alkali stress

• Resources & Environment·Plant Protection • Previous Articles     Next Articles

Effects of Long-term Increased Application of Organic Fertilizer on Soil Water and Salt Distribution and Available Phosphorus Content in Saline Irrigated Farmland

XIA Lihua1,2, LIU Tong2, SUN Hongyong1,2, WANG Jintao2, DONG Xinliang1,2   

  1. 1 College of Resources and Environmental Sciences,Gansu Agricultural University,Lanzhou 730070,China
    2 Center for Agricultural Resources Research,Institute of Genetics and Developmental Biology,Chinese Academy of Sciences,Shijiazhuang 050022,China
  • Received:2024-05-16 Published:2025-01-24

Abstract:

The shortage of fresh water resources is an important factor restricting the sustainable development of agriculture,and the adoption of saltwater irrigation with appropriate concentration is an effective way to make up for this shortage,but the continuous use of saltwater irrigation may increase the risk of soil secondary salinization.Therefore,salt leaching should be ensured when using saltwater irrigation.In order to accurately evaluate the long-term effects of saline irrigation on soil and the effect of increased application of organic fertilizer on salt leaching,this study relied on 10 consecutive years of dry treatment and 1,3,5 g/L saline water irrigation,respectively.Applying chemical fertilizer and increasing the application of organic fertilizer based on chemical fertilizer.By analyzing soil water content,electrical conductivity,pH,organic matter,total nitrogen,available phosphorus and total phosphorus contents per 20 cm of 0-200 cm soil profile,it was found that saline irrigation with different concentrations had no significant effect on surface soil electrical conductivity and other characteristics.The saline water irrigation treatment of 5 g/L increased the soil salt content below 0-20 cm and 120 cm under the application of organic fertilizer.In addition,compared with chemical fertilizer treatment,the addition of organic fertilizer treatment significantly increased the soil surface water content,organic matter,total nitrogen,available phosphorus and total phosphorus contents,and the indexes increased by 14.16%,38.27%,32.39%,44.25% and 9.56%.It can be seen that although the application of organic fertilizer increased the soil conductivity,the soil was still in a low salt environment,and the increase of organic fertilizer increased the content of soil nutrients(especially available phosphorus)more significantly.At the same time,due to rainfall and freshwater irrigation before winter wheat planting,saline water irrigations<5 g/L in this area will not cause salt accumulation in the surface soil.

Key words: Salt water, Organic fertilizer, Soil water salt distribution, Available phosphorus

Cite this article

XIA Lihua, LIU Tong, SUN Hongyong, WANG Jintao, DONG Xinliang. Effects of Long-term Increased Application of Organic Fertilizer on Soil Water and Salt Distribution and Available Phosphorus Content in Saline Irrigated Farmland[J]. Acta Agriculturae Boreali-Sinica, 2024, 39(S1): 150-158. doi: 10.7668/hbnxb.20194830.

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