对贵州喀斯特山区的土壤侵蚀所产生的环境变异作了论述。贵州喀斯特山区的土壤侵蚀不仅使土壤质量发生变异,而且对生态环境、农业生产环境都产生了十分严重的影响。自然植被减少、土地退化、石漠化已成为贵州喀斯特山区环境变异的重要特征。贵州喀斯特山区生态系统结构和功能的重建是治理贵州喀斯特环境变异的根本途径。
林昌虎 朱安国
doaj
目的生物炭作为土壤改良剂可增大土壤孔隙结构,提高土壤肥沃程度,改良土壤酸碱平衡度。方法利用玉米秸秆生物炭改良剂对石漠化区土壤进行物理改良(生物炭施入量设置为0,5%和10%),并在生物炭改良土中采用碎皮法接种本土优势藓(高接种量为1 200 g/m2,低接种量为600 g/m2),进行直剪试验及酸碱度测量,通过Spearman相关性分析藓种类、生物炭施入量及藓接种量三者的耦合关系,探究生物炭和藓在石漠化土壤上的改良效果。结果1)生物炭施入量及藓接种量会影响植物生长,5 ...
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