Abstract: To explore the effects of different materials of non-woven fabric mulching on the stoichiometric characteristics of soil carbon,nitrogen and phosphorus of alpine artificial grassland,we choose five type of degradable non-woven fabrics and five alpine ecological restoration forages to evaluate its effects on soil stoichiometric characteristics of carbon,nitrogen and phosphorus. Results showed that white thick wool fiber non-woven fabric mulching only significantly increased soil total nitrogen (STN) of Puccinellia tenuiflora by 13.21% and increased organic carbon (SOC) of Puccinellia tenuiflora by 15.32% at 0~20 cm depth. However,white thin wool fiber non-woven fabric mulching significantly increased STN of Puccinellia tenuiflora by 15.25% at 0~20 cm depth,and increased STP by 6.78%at 10~20 cm depth. In addition,straw fiber non-woven fabric mulching significantly increased SOC,STN and STP of Festuca sinensis ‘Qinghai’ at 0~20 cm depth by 17.28%,29.91%,and 11.47%,respectively. Correlation analysis showed that SOC,STN,and STP were significantly decreased with the increase of soil average temperature and minimum temperature but increased with the increase of soil water content(P<0.05). These indicate that non-woven fabric mulching significantly affects the growth and nutrient absorption of artificial grassland mainly via influencing soil minimum temperature and water content.

Key words: Degradable non-woven fabric, Artificial grassland, Soil nutrients, Stoichiometric characteristics

摘要： 为研究不同材质无纺布覆盖对高寒人工草地土壤碳氮磷化学计量特征的影响，选择5种常用生态修复草种，比较了5种可降解无纺布材料覆盖对其种植后土壤碳氮磷含量的影响。结果表明：白色厚羊毛纤维无纺布覆盖显著增加了星星草0~20 cm土层13.21%的土壤总氮和15.32%的有机碳含量；白色薄羊毛纤维无纺布显著增加了其0~20 cm土层15.25%的总氮含量以及10~20 cm土层6.78%的总磷含量；秸秆纤维无纺布显著增加了青海中华羊茅0~20 cm土层17.28%的有机碳、29.91%的总氮和11.47%的总磷含量。相关性分析表明，土壤有机碳、总氮、总磷与土壤平均温度和最低温度显著负相关，与土壤含水量显著正相关（P<0.05）。因此，无纺布覆盖主要通过影响土壤最低温度和含水量间接影响人工草地牧草的生长发育和对养分的吸收利用。

关键词: 可降解无纺布, 人工草地, 土壤养分, 化学计量特征