农业资源与环境学报2024，Vol.41Issue(6)：1295-1303,9.DOI:10.13254/j.jare.2024.0364
有机酸对盐碱土改良及苗期棉花生长的影响
Effect of organic acids on saline soil improvement and growth of cotton at seedling stage
摘要
Abstract
To investigate the effect of exogenous organic acids on salinity dynamics and cotton nutrient uptake in arid zones,a pot experiment was carried out.Here 10 treatments were set up.The control was with no application of organic acids,and three dosages gradients of 0.01%,0.05%,and 0.10%were set up for acetic acid,oxalic acid,and citric acid,respectively.Results showed that low amounts of exogenous organic acids increase the seedling emergence rate and dry matter content of cotton seeds.The seedling emergence rate and dry matter content of cotton treated with different amounts of acetic acid,oxalic acid and citric acid showed 0.01%>0.05%>0.10%.Cotton emergence rate was increased by 32.47%,52.33%,and 58.95%in 0.01%AC,0.01%OA,and 0.01%NM treatments,respectively,as compared with the control.High amounts of organic acids significantly reduced soil pH,with a decreasing trend as the amount of organic acid applied increased.Low amounts of organic acids significantly reduced the total salt,Cl-,SO42-,Na+,Mg2+,and K+content of the soil.Acetic acid,oxalic acid,and citric acid showed a trend of 0.01%<0.05%<0.10%under different dosage treatments.Compared with the control,the 0.01%AC,0.01%OA and 0.01%NM treatments reduced the total salt content by 40.18%-48.53%;Cl-content by 50.00%-57.64%;SO42-content by 25.76%-38.88%;and Na+content by 47.18%-61.97%.The addition of low levels of organic acids can promote the uptake of N,P,K and Ca in cotton stems and leaves and reduce the accumulation of Na in cotton stems and leaves.The N content of the 0.01%AC,0.01%OA and 0.01%NM treatments increased by 38.96%-59.49%;P content by 57.89%-105.26%;K content by 28.53%-55.58%;and Ca content by 60.98%-76.52%,respectively,as compared with the the control.This study showed that the application of organic acids can effectively reduce the pH and salt content of saline soils and promote the uptake of mineral nutrients N,P,K and Ca in cotton.In a combined comparison,0.01%organic acid dosage was the most effective of the three in respect of saline soil improvement and growth of cotton at seedling stage.关键词
盐碱土/有机酸/棉花/土壤理化性质/养分吸收Key words
saline soil/organic acid/cotton/physical and chemical properties of soil/nutrient uptake分类
农业科技引用本文复制引用
姜兴梅,丁浩,唐亚莉,段婧婧,唐光木,冯雷,徐万里,李青军..有机酸对盐碱土改良及苗期棉花生长的影响[J].农业资源与环境学报,2024,41(6):1295-1303,9.基金项目
国家重点研发计划项目(2021YFD1900802)National Key Research and Development Program of China(2021YFD1900802) （2021YFD1900802）
