黄土高原丘陵沟壑区不同植被恢复方式下土壤特征及相关分析

Study on Soil Characteristic and Correlation Analysis of Different Vegetation Restoration Practices in Hilly and Gully Region on Loess Altiplano

采用典范变量分析的方法，分析了黄土丘陵沟壑区吴旗县不同植被恢复方式下的土壤水分和养分变化特征。研究结果表明，封禁自然恢复植物群落的土壤水分、有机质、全N、全P和速效N含量相对较高，分别为8．2％～12．6％、12、73g/ks、0．78g/kg、0．57g/kg、50．5mg／kg；而人工小叶杨林群落、无管理的自然恢复群落的养分含量相对偏低。综合分析表明：封禁条件下的自然恢复是黄土高原丘陵沟壑区植被恢复的有效措施。

The model of canonical variate analysis was used to analyze the changeable characteristics of the soil moisture and nu- trient content under different vegetation restoration practices in Wuqi county of hilly and gully region on loess altiplano. The result showed that the soil moisture, organic matter, total N, total P and readily available nitrogen content of closure natural restoring com- munity were 8.2 ～ 12.6%, 12.73 g/kg, 0.78 g/kg, 0.57 g/kg, 50.5 mg/kg, respectively, which were higher than those of artificial Papu!us simonii community and non-management natural restoring community. Comprehensive analysis showed that banner natural restoration was the effective action for restoring the vegetation in the loess olateau hilly and gully area.