生物炭对桑树/苜蓿改良沙化土壤团聚体稳定性及酶活性的影响  

Effect of Biochar on Stability and Enzymatic Activity of Sandy Soil Agglomerates Amended With Mulberry/Clover

作　　者：郑冬梅[1,2] 王雪萌 毛莹 孙帆 ZHENG Dongmei;WANG Xuemeng;MAO Ying;SUN Fan(College of Environment,Shenyang University,Shenyang 110044,China;Northeast Geological S&T Innovation Center,China Geological Survey,Shenyang 110081,China)

机构地区：[1]沈阳大学环境学院,辽宁沈阳110044 [2]中国地质调查局东北地质科技创新中心,辽宁沈阳110081

出　　处：《沈阳大学学报（自然科学版）》2024年第5期383-390,410,共9页Journal of Shenyang University：Natural Science

基　　金：辽宁省科技厅重点研发计划指导计划(2019JH8/10200024);中国地质调查局东北地质科技创新中心区创基金项目资助(QCJJ2022-25)。

摘　　要：为探究生物炭对桑树/苜蓿改良沙化土壤团聚体粒径分布及稳定性的影响,通过室内盆栽实验,分别测定风沙土土壤团聚体粒径分布及稳定性、土壤有机质和养分质量分数及土壤酶活性,进而分析其对团聚体稳定性的影响。结果表明:施加生物炭能够显著提升土壤有机质和速效养分;桑树单独种植时土壤团聚体粒径分布优于桑树/苜蓿混种;桑树单独种植时生物炭添加量为2%可增加土壤团聚体稳定性;桑树/苜蓿混种时,生物炭添加量为0.5%可增加土壤团聚体稳定性;Pearson分析表明土壤磷酸酶的活性显著影响土壤养分变化;RDA分析进一步表明速效钾是导致土壤团聚体稳定性变异的主要环境因子。生物炭对桑树/苜蓿改良沙化土壤团聚体稳定性具有明显改善作用。In order to investigate the effect of biochar on the particle size distribution and stability of aggregates in sandy soil amended with mulberry/alfalfa,the particle size distribution and stability of aggregates in windy sandy soil,the content of soil organic matter and nutrients as well as the activity of soil enzymes were measured through indoor potting experiments to analyze their effects on the stability of aggregates.The results showed that the application of biochar could significantly improve soil organic matter and quick-acting nutrients;the particle size distribution of soil aggregates was better than that of mulberry/alfalfa mixed planting when mulberry was planted alone;the addition of 2%biochar to mulberry planted alone increased the stability of soil aggregates;Pearson analysis showed that the activity of soil phosphatase significantly affected the soil nutrient changes,and RDA analysis further showed that quick-acting potassium was the main environmental factor leading to the variation of soil aggregate stability,and biochar has obvious improvement effect on the stability of sandy soil aggregates amended by mulberry/alfalfa.

关 键 词：生物炭 风沙土改良 土壤养分 酶活性 土壤团聚体 

分 类 号：S153.6[农业科学—土壤学]