On the basis of field investigation, specimen identification, and consulting a great deal of documents, this paper applied geographic flora to analyze the leguminous plants in the West Tianshan area systematically, an...On the basis of field investigation, specimen identification, and consulting a great deal of documents, this paper applied geographic flora to analyze the leguminous plants in the West Tianshan area systematically, and explored the impact of its diversity on ecotourism. There are 349 species of the Leguminosae, belonging to 44 genera, and the species number accounts for 15.42% of the total species number in the study area. The life form is dominated by mesophyte, and the ecotype is dominated by phanerophyte. Leguminous plants in the study area have relatively complicate floristic elements, stronger temperate nature, including 238 temperate species(68.19% of the total species number). There are 123 north temperate species and varieties, accounting for 35.24% of the total species number, the distribution pattern reflects climatic and geographical distribution of the West Tianshan area. Plants are able to conserve water resources, preserve soil and water, prevent wind and fix sands, adjust regional climate, purify air, maintain ecosystem balance, and build a favorable environment. On this basis, this paper analyzed the means of promoting the protection of plant diversity in the sustainable development of ecotourism.展开更多
选取新疆南部阿克苏市郊柯柯牙防护林不同林龄新疆杨(Populus alba var.pyramidalis)林下土壤为研究对象,以裸露地为对照,通过野外采样和室内分析,基于分形维数模型研究了不同种植年限新疆杨土壤颗粒分形维数(D)特征及其主要影响因素。...选取新疆南部阿克苏市郊柯柯牙防护林不同林龄新疆杨(Populus alba var.pyramidalis)林下土壤为研究对象,以裸露地为对照,通过野外采样和室内分析,基于分形维数模型研究了不同种植年限新疆杨土壤颗粒分形维数(D)特征及其主要影响因素。结果表明:不同年限新疆杨土壤D值处于2.2693~2.7104之间,明显高于裸露地(D=2.0545)(P<0.05),由高到低依次为22年生>15年生>6年生;在土壤深度10~30 cm和30~50 cm时,22年生防护林地D值较大,其它年龄林地各土层D值变化幅度不明显(P>0.05)。该防护林内各养分含量均高于裸露地,其差异显著(P<0.05),随杨树年龄的增长而增加。林地内土壤可溶性盐总量比裸露地降低了73%,其差异显著(P<0.05),随着杨树年龄的增长,土壤pH值及水溶性盐总量趋于降低。土壤颗粒分形维数与粉黏粒、土壤有机质、速效钾、全氮、有效磷、碱解氮、HCO_3^-等土壤理化参数呈显著正相关关系,与粗砂粒、Ca^(2+)、Mg^(2+)、SO_4^(2-)、Cl^-、K^++Na^+等呈显著负相关,与全磷和pH值相关性不大(P>0.05)。研究表明,柯柯牙人工防护林水土保持措施对土壤改良效益显著,随着种植年限的延长其效果越来越明显。展开更多
基金Sponsored by Regional Science Foundation(41561013)
文摘On the basis of field investigation, specimen identification, and consulting a great deal of documents, this paper applied geographic flora to analyze the leguminous plants in the West Tianshan area systematically, and explored the impact of its diversity on ecotourism. There are 349 species of the Leguminosae, belonging to 44 genera, and the species number accounts for 15.42% of the total species number in the study area. The life form is dominated by mesophyte, and the ecotype is dominated by phanerophyte. Leguminous plants in the study area have relatively complicate floristic elements, stronger temperate nature, including 238 temperate species(68.19% of the total species number). There are 123 north temperate species and varieties, accounting for 35.24% of the total species number, the distribution pattern reflects climatic and geographical distribution of the West Tianshan area. Plants are able to conserve water resources, preserve soil and water, prevent wind and fix sands, adjust regional climate, purify air, maintain ecosystem balance, and build a favorable environment. On this basis, this paper analyzed the means of promoting the protection of plant diversity in the sustainable development of ecotourism.
文摘选取新疆南部阿克苏市郊柯柯牙防护林不同林龄新疆杨(Populus alba var.pyramidalis)林下土壤为研究对象,以裸露地为对照,通过野外采样和室内分析,基于分形维数模型研究了不同种植年限新疆杨土壤颗粒分形维数(D)特征及其主要影响因素。结果表明:不同年限新疆杨土壤D值处于2.2693~2.7104之间,明显高于裸露地(D=2.0545)(P<0.05),由高到低依次为22年生>15年生>6年生;在土壤深度10~30 cm和30~50 cm时,22年生防护林地D值较大,其它年龄林地各土层D值变化幅度不明显(P>0.05)。该防护林内各养分含量均高于裸露地,其差异显著(P<0.05),随杨树年龄的增长而增加。林地内土壤可溶性盐总量比裸露地降低了73%,其差异显著(P<0.05),随着杨树年龄的增长,土壤pH值及水溶性盐总量趋于降低。土壤颗粒分形维数与粉黏粒、土壤有机质、速效钾、全氮、有效磷、碱解氮、HCO_3^-等土壤理化参数呈显著正相关关系,与粗砂粒、Ca^(2+)、Mg^(2+)、SO_4^(2-)、Cl^-、K^++Na^+等呈显著负相关,与全磷和pH值相关性不大(P>0.05)。研究表明,柯柯牙人工防护林水土保持措施对土壤改良效益显著,随着种植年限的延长其效果越来越明显。
