青海大通地区人工林林下植被结构及其生境分析

采用样地、样线调查法,对青海省大通县的人工林林下植被的物种组成和优势种进行了初步研究。结果表明:人工林为草本、灌木的发育和植物群落的演替提供了必要的场所。针叶林如紫果云杉纯林、华北落叶松纯林及青海云杉×华北落叶松混交林的林下植被类型为耐荫植物;阔叶林如青杨纯林、白桦纯林的林下植被类型为喜光性杂草;混交林如青杨×沙棘、青杨×青海云杉、白桦×青海云杉混交林的林下植被类型为喜阴性植物。阔叶纯林及阔叶混交林的林下植被生物量相对较大,而针叶纯林及针叶混交林下植被生物量相对较小。

Analysis on Undergrowth Vegetation Structure and Habitat of Plantation in Datong Qinghai

Species composition of undergrowth vegetation and dominant species in plantation in Datong were studied preliminarily by plots and line transect method,the results showed plantation provided the necessary place where herb and shrubby grow and succession of plant community.Undergrowth vegetation type of coniferous forest were shade tolerance plant under Picea purpurea,Larix principis pure forest and Picea purpurea ×Larix principis mixed forest,undergrowth vegetation type of broadleaf forest were liking light weed under Populus cathayana and Betula platyphylla pure forest,undergrowth vegetation type of mixed forest as Populus cathayana×Hippophae rhamnoides,Populus cathayana×Picea crasfolia,Betula platyphylla× Picea crasfolia were sciadophylous plants,undergrowth vegetation biomass of broadleaf pure forest relatively large,and that of coniferous pure forest and mixed forest were relatively small.