北华大学学报（自然科学版）2018，Vol.19Issue(4)：446-452,7.DOI:10.11713/j.issn.1009-4822.2018.04.006
长白落叶松人工林下草本植物对光环境变化的响应
Response of Herbaceous Diversity and Biomass to Luminous Environment Changes under Larix olgensis Plantations
摘要
Abstract
The clear-cutting in strips and selective cutting at different intensities were carried out. The response of herbaceous diversity,biomass and high growth to luminous environment changes under the larix olgensis canopy was studied by means of canopy analyzer. The results showed that herbaceous diversity,biomass,high growth and coverage under canopy increased with the increase of total radiation index. However,different systems of cutting, the illumination range of the response of herbaceous plants is slightly different. There is no clear correlation between species diversity and total radiation intensity in clear cuts. In selective cutting, there is a significant linear correlation between species diversity and total radiation intensity. The stronger the light,the higher the herb diversity. Comparing different methods of cutting,it can be found that even with the same total radiation index value,the clear cutting zone has a relatively higher diversity,biomass,and coverage of herbaceous plants than under the canopy,indicating that clear cutting is more beneficial to herbs growth and population growth. At the same time,when the total radiation index i<0. 15,the biomass,high growth and coverage of herbaceous plants in the main cutting mode are at low level;When i>0. 15,the height and coverage of the herb entered the accelerated growth period;When i>0. 25,the biomass began to enter the accelerated growth phase. The conclusions of this study can provide reference for the study of understory biodiversity,determine a reasonable method of cutting and the intensity of selective cutting.关键词
长白落叶松/人工林/主伐方式/光环境/物种多样性/生物量Key words
Larix olgensis Henry/plantation/system of cutting/lighting performance/species diversity/biomass分类
农业科技引用本文复制引用
刘津铭,刘盛,刘庆忠,杨学秋..长白落叶松人工林下草本植物对光环境变化的响应[J].北华大学学报（自然科学版）,2018,19(4):446-452,7.基金项目
国家重点研发计划项目(2017YFD0600402-02). （2017YFD0600402-02）
