| 陕北黄土丘陵区撂荒演替中期群落比较异质性研究 |
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| 引用本文： | 杜峰,梁宗锁,徐学选,山仑,张兴昌.陕北黄土丘陵区撂荒演替中期群落比较异质性研究[J].草业学报,2007,16(5):40-47. |
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| 作者姓名： | 杜峰 梁宗锁 徐学选 山仑 张兴昌 |
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| 作者单位： | 西北农林科技大学,中国科学院水利部水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西,杨凌,712100;西北农林科技大学,中国科学院水利部水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西,杨凌,712100;西北农林科技大学,中国科学院水利部水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西,杨凌,712100;西北农林科技大学,中国科学院水利部水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西,杨凌,712100;西北农林科技大学,中国科学院水利部水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西,杨凌,712100 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)
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国家自然科学基金
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教育部跨世纪优秀人才培养计划
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中国科学院"西部之光"人才培养计划
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中国科学院前沿领域研究基金 |
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| 摘 要： | 对陕北黄土丘陵区撂荒演替中期6块样地进行了群落间异质性和群落异质性分析。结果表明,群落间异质性与环境因素差异多数为正相关,说明环境对撂荒演替中期群落组成与结构起到了一定的塑造作用,典型相关分析进一步表明群落间异质性有84.6%是由环境差异引起的,其中土壤全磷含量与群落间组成异质性、土壤水分与群落结构异质性有较强的正相关关系,说明土壤磷营养对撂荒演替中期群落组成有较大的影响,而土壤水分是影响植物生长和群落结构的重要因素,因此在对撂荒7~15年的耕地进行恢复与重建应注意磷肥的施用和节水、保水措施。
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| 关 键 词： | 黄土丘陵区 撂荒演替 群落异质性 |
| 文章编号： | 1004-5759(2007)05-0040-08 |
| 收稿时间： | 2006-03-29 |
| 修稿时间： | 2006骞?鏈?9鏃?/revised_time> |
Studies on community heterogeneity in mid-stage succession of abandoned arable land in Loess hilly region of the northern of Shanxi province |
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| DU Feng,LIANG Zong-suo,XU Xue-xuan,SHAN Lun,ZHANG Xing-chang.Studies on community heterogeneity in mid-stage succession of abandoned arable land in Loess hilly region of the northern of Shanxi province[J].Acta Prataculturae Sinica,2007,16(5):40-47. |
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| Authors: | DU Feng LIANG Zong-suo XU Xue-xuan SHAN Lun ZHANG Xing-chang |
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| Institution: | Northwest Sci-Tech University of Agriculture and Forestry, Institute of Soil and Water Conservation, Chinese Academy of Science, State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Yangling 712100, China |
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| Abstract: | In this article,heterogeneity and differential standing condition of six communities in the middle stages of succession are analyzed. Spatial heterogeneities between communities and most of the differential standing conditions show a positive relationship,which implies that environments can act on community composition and structure of the middle succession stage.Further canonical correlation shows that environmental differentia account for 84.6% of heterogeneities between communities.Whether by personal or by canonical correlation analysis,composition heterogeneities between communities and their phosphorus differences,structure heterogeneities and 0-100 cm soil moisture show strong positive relationships.This indicates that phosphorus and soil moisture are the main factors acting on composition and structural heterogeneities between communities of the middle succession stage and that attention should be given to phosphorus fertilization and saving water for revegetation of abandoned land. |
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| Keywords: | Loess hilly region succession of abandoned old-fields spatial heterogeneity of communities |
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