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陕北黄土丘陵区撂荒演替研究-撂荒演替序列
引用本文:杜峰,山仑,陈小燕,梁宗锁.陕北黄土丘陵区撂荒演替研究-撂荒演替序列[J].草地学报,2005,13(4):328-333.
作者姓名:杜峰  山仑  陈小燕  梁宗锁
作者单位:中国科学院水利部水土保持所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 西北农林科技大学, 陕西, 杨陵, 712100
基金项目:国家高技术研究发展计划(863计划) , 国家重点实验室基金 , 中国科学院知识创新工程项目
摘    要:用系统聚类法划分陕北黄土丘陵区撂荒地的次生演替阶段,可以定量的认识不同年限、立地条件下撂荒地群落的相似性,结合DCA数量排序确定撂荒地的演替阶段或序列。其撂荒演替的各阶段分别为:一年生杂类草猪毛蒿(Artemisia scoparia)+其它杂类草群丛→一年生杂类草猪毛蒿群丛→一年生杂类草猪毛蒿+多年生草种或小灌木的共优群丛→根茎禾草冰草(Agropyron cristatum)群丛→多年生草本或丛生禾草+一年生杂类草群丛→多年生草本群丛→小灌木达乌里胡枝子(Lespedeza davurica)群丛→多年生草本+小灌木或密丛型禾草群丛→短根茎密丛型禾草白羊草(Bothriochloa ischaemum)群丛。

关 键 词:黄土丘陵区  演替序列  数量分析  
收稿时间:2004-11-02

Studies on the Vegetation Succession of Abandoned Farmland in the Loess Hilly Region of Northern Shaanxi-Succession Series After Being Abandoned
DU Feng,SHAN Lun,CHEN Xiao-yan,LIANG Zong-suo.Studies on the Vegetation Succession of Abandoned Farmland in the Loess Hilly Region of Northern Shaanxi-Succession Series After Being Abandoned[J].Acta Agrestia Sinica,2005,13(4):328-333.
Authors:DU Feng  SHAN Lun  CHEN Xiao-yan  LIANG Zong-suo
Institution:Institute of Soil and Water Conservation, Chinese Academy of Science;State Key Laboratoryof Soil Erosion and Dryland Farming on the Loess Plateau;Northwest Sci-techUniversity of Agriculture and Forestry, Yangling, Shaanxi Province, 712100, China
Abstract:Using system clustering to divide the secondary successive of the abandoned farmland in the loess hilly regions of northern Shaanxi province,the similarity of lengths of years and standing conditions of the abandoned farmlands were discerned.Combining the above discernment with the quantitative ordination of DCA,the abandoned farmland successive phases and series were affirmed.The successive phases are as follows: annual weeds Artemisia scoparia+other annual weeds association→annual weeds A.scoparia assocaiation→annual weeds A.scoparia Waldstet kit+perennial herbage or undershrub assocaiation→rhizoma grass Agropyron cristatum(L.)association→perennial herbage or tuft grass+annual weeds association→perennial herbage association→undershrub Lespedeza davurica association→perennial herbage + undershrub or thick tuft grass association→short rhizome and thick tuft grass association.
Keywords:Loess hilly region  Succession series in abandoned old land  Quantitative analysis
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