文献类型：期刊文献

中文题名：高寒沙区几种典型固沙植物细根生物量及周转速率比较

英文题名：Comparative Study on Fine Roots Productivity and Turnover Rates of Several Typical Sand-Fixation Plants in Alpine Sandy Land

作者：冯莉莉[1,2,3] 贾志清[2,3] 刘涛[4] 李清雪[2,3] 张友焱[2,3] 石坤[5] 何凌仙子[2,3] 杨凯悦[2,3]

第一作者：冯莉莉

机构：[1]河北工程大学矿业与测绘工程学院;[2]中国林业科学研究院荒漠化研究所;[3]青海共和荒漠生态系统定位观测研究站;[4]中国林业科学研究院林业研究所;[5]北京林业大学水土保持学院

年份：2018

卷号：25

期号：2

起止页码：120-125

中文期刊名：水土保持研究

外文期刊名：Research of Soil and Water Conservation

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2017_2018】；

基金：林业公益性行业科研专项"青海共和盆地典型固沙植物根系特征及功能研究"(201504420);国家自然科学基金(31670706;31600585)

语种：中文

中文关键词：固沙植物;细根生物量;细根周转速率;钻土芯法;高寒沙区

外文关键词：sand-fixation plants;fine roots productivity;fine roots turnover rates;sequential soil coring method;alpine sandy land

分类号：S718.5;S157.4

摘要：利用钻土芯法获取了6—8月不同固沙植物的细根,并确定其生物量分布。采用极差法和矩阵法计算了不同固沙植物的细根周转速率。结果表明:不同固沙植物的细根生物量主要分布在0—40cm的深度。在沙丘上,不同固沙植物细根周转速率的相对顺序为:沙蒿(Artemisia desertorum)混交林>沙蒿>柠条锦鸡儿(Caragana korshinskii)>中间锦鸡儿(Caragana intermedia)混交林>中间锦鸡儿,从结果来看低矮的沙蒿相对于高大的柠条锦鸡儿或者中间锦鸡儿具有较高的细根周转速率。在丘间地上,不同固沙植物细根周转速率的相对顺序为:沙柳(Salix psammophila)>小穗柳(Salix microstachya)>乌柳(Salix cheilophila)混交林>小叶杨(Populus simonii)混交林>乌柳>小叶杨,从结果来看沙柳的细根周转速率明显大于其他几种固沙植物,而高大的乔木小叶杨具有较低的细根周转速率。无论是在沙丘还是丘间地上,混交林的细根周转速率都要大于纯林。高寒沙区典型固沙植物的细根生物量及周转速率研究为该区域植被细根的养分循环、碳平衡等相关研究提供理论依据。
Sequential coring method was used to collect the fine roots data from June to August in alpine sandy land.Turnover rates were calculated by maximum or mean biomass during the growing season in 2015 using Decision Matrix(DM)or maximum-minimum(MM)method.In vertical direction,fine roots mainly distribute in 0-40 cm soil layer.On moving sand dune,the fine roots turnover rates among species decreased in the sequence of Artemisia desertorum(mixed)>Artemisia desertorum>Caragana korshinskii>Caragana intermedia(mixed)>Caragana intermedia.Fine roots turnover rates of Artemisia desertorum are higher than those of Caragana intermedia and Caragana korshinskii on moving sand dune.On the interdune,the fine roots turnover rates among species deduced in the order:Salix psammophila>Salix microstachya>Salix cheilophila(mixed)>Populus simonii(mixed)>Salix cheilophila>Populus simonii.Fine roots turnover rates of Salix psammophila are higher than those of the other sand-fixation plants.Fine roots turnover rates of Populus simonii are the lowest.Mixed forest has more advantages compared to pure forest in alpine sandy land.This study is significant to provide a theoretical basis for nutrient cycling and carbon balance of fine roots in this region.