经过20a多的人工恢复和封禁措施，纸坊沟流域内的植物群落对土壤养分产生明显影响，植被对土壤养分的作用表现为，在植被作用下土壤有机质、全氮、水解氮、全磷、速效磷向土壤上层富集，但不同植被对养分的影响不同。从土壤剖面来看，植被对0-20 cm土壤养分作用大于20-40 cm；从植被生活型来看，草本对0-40 cm土壤养分的提高作用大于乔木和灌木。土壤全氮与土壤有机质之间有良好的线性相关关系，土壤全磷与土壤有机质之间也有一定的线性相关关系，其中0-20 cm相关性好，但20-40 cm相关性较差，说明土壤有机质的累积和分解对土壤全磷和全氮有重要影响。
Through more than 20 years artificial vegetation restoration and stopping grazing in Zhifanggou watershed, the plant communities had obvious effect on the soil nutrient by vegetation accumulation on the top of the soil with various effect of different plant. The content of nutrient in the profile of soil in 0-20 cm was higher than that in 20-40 cm, and the increasing effect on soil nutrient by herbage communities was clearer than by arboreal communities and by bush communities. In addition, the content of nitrogen had a linear correlativity with the organic matter content. The content of phosphorus had a linear correlativity with organic matter too. However, in 20-40 cm soil layer, the relationship of linear correlativity was not significant.