生态科学2025，Vol.44Issue(2)：97-104,8.DOI:10.14108/j.cnki.1008-8873.2025.02.010
有机肥对荒漠草原土壤团聚体稳定性的影响
Effects of organic fertilizer on soil aggregate stability in desert steppe
摘要
Abstract
To clarify the impact of organic fertilizer on soil aggregate stability in desert steppe,earthworm fertilizer produced from cow manure was selected.Three treatments were established in Yanchi County,Ningxia:application rates of 2.0×104 kg·hm-2·a-1(F2),1.0×104 kg·hm-2·a-1(F1)and 0 kg·hm-2·a-1(CK).Changes in particle-size distribution and stability indices of mechanically stable and water-stable aggregates in the 0-40 cm soil layer were investigated.The results showed that:The soil nutrient status of desert steppe was improved by organic fertilizer application.The 0-40 cm soil layer of each treatment was dominated by aggregates with a particle size of<0.25 mm.The contents of 5-7 mm,0.25-0.5 mm particle size of mechanically stable aggregates and>2 mm,0.25-0.5 mm particle size of water stable aggregates were significantly increased with the application of organic fertilizer.In 0-30 cm soil layer,the average weight diameter(MWD)and geometric mean diameter(GMD)of soil aggregates were significantly increased,while the aggregate damage rate(PAD),erodibility K value,fractal dimension(Dm)were significantly decreased by the application of organic fertilizer(P<0.05).In 30-40 cm soil layer,there were no significant difference among different treatments of average weight diameter(MWD),geometric mean diameter(GMD),aggregate damage rate(PAD),mechanical stability and erodibility K value(P>0.05).In conclusion,organic fertilizer significantly enhanced soil aggregate stability and increased large aggregate proportions(>2 mm)in desert steppe.Higher application rates improved erosion resistance.关键词
荒漠草原/有机肥/机械稳定性团聚体/水稳性团聚体/团聚体稳定性Key words
desert steppe/organic fertilizer/mechanical stable aggregate/water-stable aggregate/aggregate stability分类
生物科学引用本文复制引用
撒春宁,李永康,王星,宋珂辰,许冬梅..有机肥对荒漠草原土壤团聚体稳定性的影响[J].生态科学,2025,44(2):97-104,8.基金项目
宁夏回族自治区重点研发计划项目(2018BEG03007) （2018BEG03007）
宁夏高等学校一流学科建设(草学学科)项目(NXYLXK2017A01) （草学学科）
