草业学报2025，Vol.34Issue(2)：94-108,15.DOI:10.11686/cyxb2024154
不同施肥处理种植王草后对稀土尾矿土壤理化性质和酶活性的影响
Effects of different fertilization treatments on soil physical and chemical properties and enzyme activity of rare earth mine tailings after planting king grass
摘要
Abstract
The aim of this study was to determine the effect of different fertilization treatments on the growth of king grass(Pennisetum purpureum×Pennisetum americanum cv.Reyan No.4)planted as a strategy to rehabilitate soil in rare earth tailings.A field experiment was conducted with six treatments,namely chemical fertilizer(CK),biogas slurry(Z),decomposed cow dung(N),decomposed cow dung+biogas slurry(N+Z),earthworm castings(Q),and earthworm castings+biogas slurry(Q+Z).The effects of the different treatments on soil physical and chemical properties,soil enzyme activities,and the patterns of enzyme interactions were determined in three consecutive years.The results showed that:1)In each group,the soil bulk density showed a downward trend over the three years,and the maximum moisture capacity,capillary moisture capacity,porosity,aeration,pH,and contents of organic matter,nitrogen,phosphorus,potassium,alkaline nitrogen,and available phosphorus showed an upward trend.In the third year of restoration,the Q+Z treatment had the strongest effect to improve soil bulk density,moisture capacity,porosity,aeration,pH,and available phosphorus and available potassium contents.2)The activities of soil urease,acid phosphatase,and sucrase showed an increasing trend in the N,N+Z,Q,and Q+Z treatments over the three years,and their values were significantly higher than those in the CK group in the third year(P<0.05).Soil dehydrogenase activity was significantly higher in the N+Z treatment than in CK in the first year.The activities of soil urease,acid phosphatase,and sucrase were higher in the Q treatment than in the other treatments.3)The activities of soil urease,acid phosphatase,and sucrase showed highly significant negative correlations with soil bulk density,and highly significant positive correlations with soil pH,organic matter,available nutrients,moisture capacity,porosity,and aeration.The dehydrogenase activity showed a highly significant correlation with total phosphorus content,and significant correlations with total potassium,alkaline nitrogen,available phosphorus,and organic matter contents,and capillary moisture capacity,porosity,and aeration.Through a comprehensive evaluation using a fuzzy mathematics membership function method,it was found that the application of earthworm cast+biogas slurry was the most effective treatment to repair soil over three consecutive years.Therefore,this treatment was identified as the best fertilization treatment for cultivating king grass to repair the soil of ion-type rare earth tailings in Gannan.关键词
稀土尾矿/王草/施肥/土壤理化性质/土壤酶活性Key words
rare earth tailings/king grass/fertilization/soil physical and chemical properties/soil enzyme activity引用本文复制引用
欧翔,连海,陈荣强,邱静芸,吴丽娟,操贤洪,张强,雷小文..不同施肥处理种植王草后对稀土尾矿土壤理化性质和酶活性的影响[J].草业学报,2025,34(2):94-108,15.基金项目
中央引导地方科技发展项目(20221ZDF0317)和江西省高层次高技能领军人才培养工程人选项目(赣人社发[2022]34号)资助. （20221ZDF0317）
