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延安城郊防护林外貌结构及林下植物的多样性
引用本文:康博文,侯琳,刘建军,王得祥,韩黎明. 延安城郊防护林外貌结构及林下植物的多样性[J]. 中南林业科技大学学报(自然科学版), 2005, 25(5): 15-21
作者姓名:康博文  侯琳  刘建军  王得祥  韩黎明
作者单位:西北农林科技大学林科院,西北农林科技大学林科院,西北农林科技大学林科院,西北农林科技大学林科院,延安市林业科学研究所 陕西 杨凌 712100,陕西 杨凌 712100,陕西 杨凌 712100,陕西 杨凌 712100,陕西 延安 716000
摘    要:在延安对刺槐、油松、侧柏纯林及刺槐 侧柏、刺槐 油松混交林等几种黄土高原主要人工林群落外貌结构、林下植物多样性特征进行了研究.结果表明:混交林群落外貌结构较为复杂,林下植物群落类型各不相同;林下植物的Simpson多样性指数和Shnnon-wiener多样性指数分别为0.902 57~0.674 88和2.012 88~1.479 67,刺槐 油松林最高,16年生刺槐纯林最低;32年生刺槐纯林林下植物优势度最高者是糙隐子草,16年生刺槐纯林则为牡蒿,其它林型都是铁杆蒿;本地区选择防护林类型时,应优先选择刺槐 油松或刺槐 侧柏混交,对已有的成熟或衰退刺槐纯林可采取择伐萌蘖抚育,并间植油松或刺柏,形成针阔混交林.

关 键 词:植物学  延安  防护林  外貌结构  物种多样性
文章编号:1000-2502(2005)05-0015-07
修稿时间:2005-02-11

Physiognomy Structure and Species Diversity of Herb and Shrub of Rural Protection Forests in Yan''''an City
KANG Bo-wen,HOU Lin,LIU Jian-jun,WANG De-xiang,HAN Li-ming. Physiognomy Structure and Species Diversity of Herb and Shrub of Rural Protection Forests in Yan''''an City[J]. , 2005, 25(5): 15-21
Authors:KANG Bo-wen  HOU Lin  LIU Jian-jun  WANG De-xiang  HAN Li-ming
Affiliation:1. Forestry College of Northwest A & F University. Yangling 712100. Shanxi. China; 2. Forestry Institute of Yan'an. Yan'an 716000. Shanxi. China
Abstract:The paper conducts a study of the physiognomy structure of major protection forests in the suburban areas of Yan'an City. and of the species diversity of herb and shrub in these plantations, including the pure forests of Robinia pscudoacacia, Pinus tabulaeformis and Platycladus orientalis, and the mixed forests of R. pseudoacacia with P. tabulaeformis and R. pseudoacacia with P. orientalis. The results show that the physiognomy structure and community types of the bottom plants of the tested forests are quite different from each other. Simpson's diversity index and Shannon-wiener's diversity index of herb and shrub are respectively 0.90257 to 0.674 88 and 2.01288 to 1.47967, and the index of the forest of R. pseudoacacia with P, tabulaeformis is the highest. and that of R. pseudoacacia aged 16 a is the lowest. Species significant value of Cleistogenes chinensis is the highest in the 32-year-old R. pseudoacacia forest, that of Artemisia japonica is the highest in the 16-year-old R. pseudoacaeia forest, and that of A. sacrorum is the highest in all other tested forests. The suggestion is that measures should be taken to afforest mixed forest of R. pseudoacacia with P. orientalis first, and then to fell trees selectively in order to afforest mixed forest of R. pseudoacacia with P. tabulaeformis or R. pseudoacacia with P. orientalis when R. pseudoacacia stands is mature or excessively mature.
Keywords:botany  Yan'an  city  protection forests  physiognomy structure  species diversity
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