Effects of Cottonseed Meal on Saline-alkali Soil Improvement and Cotton Yield

【Objective】To solve the problem that soil salinization is becoming more and more serious in Xinjiang,which leads to the continuous decrease of crop yield.【Method】Field control experiments were conducted at the Test Station of Agricultural College of Shihezi University with cotton as the experimental material.Cottonseed meal was designed to be applied in different salinized and alkalized soils.By sampling and investigating the physical and chemical properties of soil at different growth stages,combined with cotton yield,this paper provided support for exploring how to improve saline-alkali soil and increase crop yield.【Result】The results showed that:By applying cotton aphid treatment,soil bulk density,pH and EC could be effectively reduced,leading to the improvement of soil physical and chemical properties.The bulk density of surface moderately salinized soil decreased by 16.1%.16.1%,and the pH of mild and severely alkalized soil were obviously decreased.The decrease of EC in salinized soil was more obvious than that in alkalized soil,the soil cations decreased to varying degrees,and cotton yield increased effectively.【Conclusion】Cottonseed meal had obvious effect on saline-alkali soil improvement.The bulk density,pH,EC and exchangeable cations of salinized soil could be reduced by adding cotton meal,thus effectively improving soil physical and chemical properties.The effects of cottonseed meal on saline-alkali soil were different.The improvement measures of cottonseed meal on saline-alkali soil were to reduce soil EC,and the improvement measures for alkali soil were to reduce soil pH.Through principal component analysis and correlation analysis,high soil pH and EC in saline-alkali soil were the main reasons for inhibiting cotton yield.Adding cottonseed meal could alleviate the damage to cotton under saline-alkali stress and improve cotton yield.