




摘要:對白花三葉草、沙棘、檉柳3種植被不同配置方式緩沖帶對徑流水中固體顆粒懸浮物的凈化效果進行了研究。結果表明草本緩沖帶對SS的凈化效果明顯,可凈化約82.81%的SS。3塊樣地沿程截流污染物效果為:草本帶>灌木帶≈小喬木帶。通過土壤抗侵蝕能力的評估,草本可提高 0~20 cm土層的抗剪切能力。灌木可提高20~40 cm土層的抗剪切能力,喬木可提高20~55 cm土層的抗剪切能力
關鍵詞:濱河緩沖帶 ;面源污染 ;抗侵蝕性
中圖分類號:S73文獻標識碼:ADOI編碼:10.3969/j.issn.1006-6500.2010.06.023
Different Effects of Different Plant in the Riparian Buffer Zone
LI Lin-ying1 , SU Tian-yang2,YAO Yan-tao2
(1.Shanxi Academy of Forestry Science,Taiyuan,Shanxi 030012,China;2. Shanxi Agricultural University,Taigu,Shanxi 030801, China)
Abstract:A series of pilot experiments of runoff pollution were conducted on riparian buffer strips covered with Agropyron cristatum (Linn.) Gaertn, Hippophae rhamnoides Linn, Tamarix chinensis. The results showed that the herb of purification buffer zone on the SS effect is obvious, can purify approximately 82.81% of the SS. The effect of cut-off pollutant was thatAgropyron cristatum (Linn.) Gaertn > Hippophae rhamnoides Linn ≈ Tamarix chinensis. Through the appraisal to the soil anti-etching power, the herb may enhance 0~20 cm soil layer anti-cutting ability, the bush 20~40 cm , the tree 20~55 cm.
Key words: buffer strips;non-point pollution;corrosion resistance
隨著中國經濟的發展,對環境的破壞日益嚴重,對環境保護的力度也越來越大。水體污染導致水生生態系統的破壞和水生生物多樣性下降,對人們的健康構成了嚴重的威脅。隨著點源污染的逐步有效控制,農業非點源污染對水環境的污染貢獻比例越來越高。在農業生產過程中,由于降雨等因素導致的養分、農藥流失不可避免。在最大限度降低其產生量的前提下,如何減少其入河量,是解決農業非點源污染問題的熱點之一[1-2]。河岸緩沖帶作為高地和水體之間的過渡帶,在控制氮、磷等面源污染物輸入方面發揮著重要作用,是河溪健康維護研究的重點[3-4]。本研究主要研究草本、灌木、喬木在緩沖帶凈化水質和水土保持方面所發揮的不同作用,以期為山西嵐縣及全國各類似地區河岸緩沖帶的研究和營建提供借鑒。
1材料和方法
1.1試驗基地概況
試驗基地位于山西嵐縣嵐漪河,東經110°52′~111°53′,北緯38°12′~38°55′,海拔2 222 m。嵐縣嵐漪河流域屬于大陸性半干旱氣候?!?br>