[目的] 退耕还林是改善土壤结构、减少水土流失的重要举措,明确还林树种对土壤团聚体形成过程的影响机制可为水土保持提供重要的依据。[方法] 选择华西雨屏区紫色土坡耕地(玉米地)还林20年形成的柳杉林、混交林、茶园和慈竹林4种人工林土壤为研究对象,分析土壤团聚体分布及其稳定性的变化。[结果] (1)相较于坡耕地,混交林、茶园和慈竹林土壤>5 mm团聚体含量显著增加,而0.5~1 mm团聚体含量显著减少(p 5 mm;(2)人工林土壤团聚体GMD、MWD和R0.25分别上升46.93%~330.30%,47 ...
钟宇健 +4 more
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