CAJ | 학술논문

采用原状土冲刷水槽法（测定土壤抗冲性）、静水崩解法（测定土壤抗蚀性），研究了紫穗槐（ Amorpha fruticosa）、柽柳（ Tamarix chinensis）、沙棘（ Hippophae rhamnoides）、杨柴（ Hedysarum fruticosum var．mongolicum）、小叶锦鸡儿（ Caragana microphylla）根系分布特征及根系对土壤抗冲性、抗蚀性的增强效应。结果表明：植物根系主要分布在0～20 cm深的土层内，根系生物量随土层深度增加而减少，细根在根系生物量组成中占有重要地位；根系对土壤抗冲性有较强的增强作用，根茎φ≤1 mm的根系生物量、1 mm＜φ≤3 mm根系生物量、土壤有机质质量分数与抗冲指数呈显著的正相关关系；根系对土壤抗蚀性有较强的增强作用，φ≤1 mm根系生物量、土壤有机质质量分数与抗蚀指数呈显著的正相关关系；紫穗槐、柽柳根系增强土壤抗侵蚀作用的能力较强，可作为主要水土保持树种使用。
채용원상토충쇄수조법（측정토양항충성）、정수붕해법（측정토양항식성），연구료자수괴（ Amorpha fruticosa）、정류（ Tamarix chinensis）、사극（ Hippophae rhamnoides）、양시（ Hedysarum fruticosum var．mongolicum）、소협금계인（ Caragana microphylla）근계분포특정급근계대토양항충성、항식성적증강효응。결과표명：식물근계주요분포재0～20 cm심적토층내，근계생물량수토층심도증가이감소，세근재근계생물량조성중점유중요지위；근계대토양항충성유교강적증강작용，근경φ≤1 mm적근계생물량、1 mm＜φ≤3 mm근계생물량、토양유궤질질량분수여항충지수정현저적정상관관계；근계대토양항식성유교강적증강작용，φ≤1 mm근계생물량、토양유궤질질량분수여항식지수정현저적정상관관계；자수괴、정류근계증강토양항침식작용적능력교강，가작위주요수토보지수충사용。
An experiment was conducted to study the root morphological distribution and the enhancement effects on soil anti-scouribility and soil anti-erodibility of roots of Amorpha fruticosa, Tamarix chinensis, Hippophae rhamnoides, Hedysarum fruticosum var.mongolicum and Caragana microphylla.The soil anti-scouribility was identified by using the undisturbed soil trough scouring method and the soil anti-erodibility was identified by hydrostatic collapse method.The root biomass are mainly distributed in 0-20 cm layer of soil and the root biomass decreases with the increaseing of the soil depth.It is the thin roots which is important in the composition of root biomass.Roots have significantly positive enhancement effects on soil anti-scouribility.Biomass of≤1 mm roots, 1-3 mm roots, and the organic matter content of soil are significantly posi-tive correlation with soil anti-scouribility values.Roots have significantly positive enhancement effects on soil anti-erodibili-ty.Biomass of ≤1 mm roots and the organic matter content of soil are significantly positive correlationwith soil anti-erod-ibility values.Roots of Amo rpha fruticosa and Tamarix chinensis have significantly positive enhancement effects on soil ero-sion resistance.Amorpha fruticosa and Tamarix chinensis can be planted asmain varieties of trees on conservation ofwater and soil.