实验技术与管理2025，Vol.42Issue(6)：226-232,7.DOI:10.16791/j.cnki.sjg.2025.06.029
不同改良剂对苏打盐碱土肥力因子和玉米生长影响的实验探究
Experimental investigation on the effects of different amendments on soil fertility factors and maize growth in soda saline-alkali soil
摘要
Abstract
[Objective]The primary objective of this study is to develop an efficient approach for improving soil fertility in soda saline-alkali lands,which is of great significance for promoting sustainable agricultural development and ensuring food security in China.Biochemical fulvic acid(BFA)and attapulgite clay demonstrate promising potential as environmentally-friendly soil amendments due to their superior adsorption capacities and cost-effectiveness.To investigate their effects on soil improvement and maize growth promotion in soda saline-alkali soils,we conducted a comprehensive study evaluating the impacts of BFA and attapulgite clay application on critical soil fertility parameters,maize salt tolerance,and biomass production under saline-alkaline stress conditions.[Methods]The experimental soil was collected from Tongliao City,Inner Mongolia,a primary maize cultivation area characterized by soda saline-alkali soil.A pot experiment was conducted with four treatments:CK(control without BFA or attapulgite clay),AC(30 g attapulgite clay added per kg soil),FA(4 g BFA added per kg soil),and FA+AC(combined application of 4 g BFA and 30 g attapulgite clay per kg soil).Each treatment was replicated three times and sampled at four growth stages(30,48,62,and 80 days after sowing),resulting in a total of 48 experimental pots.The measured parameters included:soil pH,moisture content,organic carbon,total nitrogen,aggregate size distribution,exchangeable base cations,total soluble salts,available phosphorus(P),aboveground and root biomass of maize,as well as sodium(Na+)and potassium(K+)ion concentrations in maize plant tissues.[Results]Compared to the control,the application of attapulgite clay increased soil moisture content(58.7-76.4%)and pH(0.12-0.19 units)across all sampling periods but reduced available P content.At 80 day after sowing,the AC treatment elevated soil Ca2+and Mg2+contents by 18.1%and 23.9%,respectively.In contrast,biochemical fulvic acid application decreased soil pH(0.06-0.34 units)while enhancing available P content(44.9-57.9%).At 80 days after sowing,the FA treatment improved soil K+and Na+contents,while decreased Ca2+and Mg2+contents,compared to CK.The combined application of biochemical fulvic acid and attapulgite clay resulted in higher soil exchangeable base cations content,respectively increased by 51.5%for K+,7.9%for Na+,3.9%for Ca2+,and 4.9%for Mg2+relative to CK.Furthermore,the FA+AC treatment led to lower sodium-to-potassium ratio(Na+/K+)in maize shoots,decreased by 31%,16.5%,28.1%,and 24.8%at 30,48,62,and 80 day after sowing,respectively,compared to CK.Aboveground and belowground biomass of maize were significantly higher under FA+AC than that in CK,increased by 23.3%and 53.9%,40.7%and 47.2%,35.6%and 62.9%at 30,48,62,and 80 day after sowing,respectively.[Conclusion]This study demonstrates that the combined application of attapulgite clay and biochemical fulvic acid synergistically integrates their individual advantages in ameliorating soda saline-alkali soils,while significantly enhancing maize salt tolerance and biomass production.These findings provide a viable strategy for improving soil quality and optimizing maize growth environments in saline-alkali regions,showing considerable application potential for sustainable agriculture.Furthermore,the experimental design facilitated the cultivation of students'ability to apply theoretical knowledge to practical agricultural challenges,thereby fostering innovative thinking in addressing real-world soil management issues.关键词
盐碱土改良/生化黄腐酸/凹凸棒石黏土/土壤肥力/玉米耐盐性Key words
saline-alkali soil improvement/biochemical fulvic acid/attapulgite clay/soil fertility/salt tolerance of corn分类
农业科技引用本文复制引用
宓文海,洪煜,王春竣,孙燕,胡子付,陈硕桐..不同改良剂对苏打盐碱土肥力因子和玉米生长影响的实验探究[J].实验技术与管理,2025,42(6):226-232,7.基金项目
内蒙古自治区科技计划项目(2022YFSH0025) （2022YFSH0025）
国家自然科学基金项目(41907010) （41907010）
扬州大学"青蓝工程"骨干教师培养计划项目(2022-34号) （2022-34号）
扬州大学教学改革研究课题立项支持项目(YZUJX2023-D10) （YZUJX2023-D10）
