Effects of Acid-Base Balance Conditioner Application on Cotton Yield and Soil Salinization Parameters in Sulfate Saline Fields
In order to investigate the effects and mechanisms of acid-base balance conditioner application on saline cotton field improving,and to provide theoretical bases for saline land improvement and stable cotton yield,two treatments as acid-base balance conditioner application and control were set in 2021-2022 in a sul-fate type cotton field in Shawan County,Xinjiang.The conductivity and pH of 0～20-cm soil layer were moni-tored,and the indexes of cotton growth,yield and soil salinity were measured.The results were as follows.(1)Compared with the control,the emergence rate of cotton treated with acid-base balance conditioner was significantly increased by 4.93～6.13 percent points.(2)The seed cotton yields of acid-base balance condi-tioner treatment in 2021 and 2022 were 5 210.06 and 6 815.43 kg/hm2,respectively,which were 25.98%and 8.87%higher than that of the control.(3)Sodium sorption ratio in 10～20-cm soil layer of the acid-base bal-ance conditioner treatment was reduced by 0.077 in 2021 compared with the control,while that was reduced by 0.204 and 0.173 in 0～10-cm and 10～20-cm soil layers respectively in 2022.(4)The change of soil total salt was significantly positively correlated with the change of SO2-4(P<0.05)and Na+(P<0.01).The change of seed cotton yield was significantly negatively correlated with the number of bells per plant(P<0.05)and the change of soil conductivity(P<0.01),but significantly positively correlated with single bell weight change(P<0.01).In conclusion,the application of acid-base balance conditioner in sulfate type cotton fields could reduce soil salinity and increase seed cotton yield.
Acid-base balance conditionerSulfate type saline soilSalinization parametersCottonSeed cotton yield
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