南方紫色土区不同森林恢复类型对土壤质量的影响,免费工学论文,免费论文网,免费林学论文 关键词： 森林恢复类型；土壤质量；紫色土区 [gap=1262]keywords: forest restoration types; soil quality; purple soil areas
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purple soil erosion areas 紫色土流失区
areas of purple soil 紫色土区
purple soil areas
紫色土壤地区
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The result showed that the heavy metal pollution have existed in purple soil area, and it was most obviously at the mining areas and big city suburbs.
结果表明，紫色土区已存在重金属污染问题，尤以矿区和大城市近郊最为明显。
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