摘要
为建立石漠化区域土壤理化指标变异监测系统,为石漠化区域的生态修复工作奠定基础,以贵州省石漠化较严重的西部地区为对象,分析了该区域不同生态模式下的土壤理化性质变异特征及理化指标的相关性。结果表明:各生态模式下土壤有机质和氮磷钾含量以林地最高,荒地最低;施加外源肥料对土壤理化性质有一定影响,农用地土壤中有机质、全氮、碱解氮、全磷和速效钾含量较草地和荒地高;有机质与碱解氮含量、全氮与碱解氮含量极显著相关,有机质与全氮含量、全钾与速效钾含量显著相关。随着植被覆盖率的降低,有机质和氮磷钾等养分逐渐流失,封山育林可提高植被覆盖率,减少土壤侵蚀,促进氮磷钾及有机质的有效累积进而增肥保土。
For establishing the monitoring systems of edaphic physicochemical index in the rocky desert region so as to make a stable groundwork for ecological restoration, the author focused on the most serious western desert, and analyzed the edaphic chemical index features and correlation under different ecological style. The result showed that the content of organic matter, N, P and K are the highest in forest and lowest in wasteland. There were quite influences on edaphic chemical index through bringing into exogenetic fertilizer, as a consequent, the contents of organic matter, total N, alkaline hydrolytic N, total P and available K in farmland were higher than that in lawn and wasteland. The organic matter content had a very significant correlation with alkaline hydrolytic N content, so did total N content and alkaline hydrolytic N content. There was a significant correlation between organic matter content and total N content, the same between total K content and available K content. With the decrease of coverage rate, organic matter, N, P and K were tapering off. By enclosing the hills for natural afforestation, the coverage rate of vegetation would rise and the edaphic erosion was going to reduce. At the same time, it improved effective accumulation of N, P, K and organic matter, so as to keep soil and increase nutrient.
出处
《贵州农业科学》
CAS
北大核心
2012年第6期131-133,137,共4页
Guizhou Agricultural Sciences
基金
贵州省省长基金"贵州省喀斯特山区石漠化分级分类中土壤性状特征研究"[黔省专合字(2005)47]
贵州省能力建设项目"贵州省渔业资源利用研发创新团队建设项目"[黔科合院所创能(2011)4004]
关键词
石漠化
生态模式
土壤
理化指标
变异
rocky desertification
ecological style
soil
physiochemical index
variation
