燕山山地华北落叶松人工林乔木生物量空间分布格局

以燕山山地华北落叶松人工林为研究对象,应用典型样地调查法和相对生长法对乔木生物量展开研究,以揭示华北落叶松乔木层生物量分配格局。结果显示:各器官中生物量大小顺序为树干枝条根系叶片树皮,12年生和34年生树干生物量所占比例分别为35.16%~37.95%和51.12%~53.40%;立地条件越好,林龄越大,生物量越大,林分越稳定,变异系数较小;本研究还得出,树冠上部叶片生物量较小,但由于BNR较小,BNI和FC较大,与树冠下部相比其光合效率大大提高。

Spatial distribution pattern of the arbor layer biomass of Larix principis-rupprechtii Mayr plantations in Yanshan mountainous regions

Application of the typical plot survey method and relative growth method of the biomass of Larix principis-rupprechtii Mayr. plantations in Yanshan mountainous regions were studied,In order to reveal the biomass allocation. the results show,The size order of every organ′s biomass in arbor layer was trunks＞branchs＞ roots＞leaves＞barks,the trunks of 12 years old and 34 years old to the total biomass were 35.16%-37.95% and 51.12%-53.40%;the better site conditions,the greater tree age,the greater biomass,stand more stable,the small coefficient of variation;this study also obtained that the small upper leaf crown biomass,but due to the small BNR,the large BNI and FC,compared with lower crown greatly improve the photosynthetic efficiency.