4种灌木林地根系分布特征及其固持土壤效应的研究  

Study on Root Distribution and Impact on Holding Soil of Four Kinds of Shrubbery

作　　者：杨吉华[1] 李红云 李焕平 杨德运 李萍 

机构地区：[1]山东农业大学林学院水土保持系,山东泰安271018 [2]山东省潍坊市水利局,山东潍坊261031 [3]山东省潍坊市城区供水处,山东潍坊261061

出　　处：《水土保持学报》2007年第3期48-51,共4页Journal of Soil and Water Conservation

基　　金：山东省水利厅资助项目"山东典型侵蚀区水土流失机理与综合治理效益研究"

摘　　要：研究了石灰岩山区的黄栌、连翘、绣线菊和黄荆4种灌木林地根系分布特征及其固持土壤效应。结果表明：4种灌木林地根系的分布特征存在极显著差异,黄栌林地根系的生物量和长度均最大,各径级根系中直径〈1 mm的根系生物量最大;连翘林地根系的生物量和长度均较小,各径级根系中直径≥5 mm的根系生物量最大;黄荆林地根系的生物量和长度较高,主要分布在0～20 cm土壤层;绣线菊林地根系生物量最小,主要分布在0～20 cm土壤层。4种灌木林地土壤的抗侵蚀性能明显高于荒坡地,且与0～20 cm层根系生物量和根系长度显著相关,根系固持土壤效应从强到弱依次为：黄栌林〉黄荆林〉绣线菊林〉连翘林。This article studied the root distribution and impact on soil anti-erosion capability of the four kinds of shrubbery of Cotionus coggygria Seop, Forsythia suspensa Vahl, Spiraea trilobata Linn. and Vitex negundo Linn. in limestone mountainous area. The results showed that the root biomass and root length in Cotionus coggygria Seop. forestland was biggest. In Cotionus coggygria Stop. forestland, there was a mass of root in 20-40 cm soil layer and root biomass of diameter 〈1 mm was biggest. The root biomass and root length in Forsythia suspensa Vahl. forestland was lesser and root biomass of diameter 〈1 mm was much bigger than the other. The root was mainly in 0-20 cm soil layer in Vitex negundo Linn. forestland and the root biomass decreased as the increase of root diameter. The root biomass and root length in Spiraea trilobata Linn. forestland was lesser and the root dis- tribution of different diameter like that of Cotionus coggygria Scop. forestland. The soil anti-erosion capability of the four kinds of shrubberyhad positive correlativity with the root biomass and root length in 0- 20 cm soil layer. The sequences of the soil anti-erosion capability of the four kinds of shrubbery were： Cotionus coggygria Stop. forestland. 〉 Vitex negundo Linn. forestland 〉 Spiraea trilobata Linn. forestland 〉 Forsythia suspensa Vahl. forestland.

关 键 词：石灰岩山区 灌木林 根系 固持土壤 

分 类 号：S714.7[农业科学—林学]