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以长沙市城乡交错带4种人工林为研究对象,对各林分林下植被生物量的分布特征进行了分析。结果表明:4种林分林下活地被物生物量均表现为地上部分>地下部分;枯落物层生物量的变化趋势一致:已分解>半分解>未分解,且在不同林分中,枯落物的生物量占林下地被物生物量的比例均为最大,在50%~76%之间,除杉木人工林外,其余3种林分草本层所占比例最小;总生物量差异较为显著,湿地松林为28.75 t/hm2,显著大于其它3种林分;活地被物生物量以湿地松林为最大,达8.46 t/hm2;幼树层生物量的大小为湿地松林>枫香林>杉木林>樟树林;灌木层生物量的排列顺序为枫香林>湿地松林>樟树林>杉木林;草本层为杉木林>湿地松林>枫香林>樟树林;凋落物生物量的变化规律同草本层。
Taking four kinds of artificial forests in urban-rural interlaced zone of Changsha City as the research object, the distribution characteristics of understory vegetation biomass of each forest was analyzed. The results showed that the biomass of undergrowth in the four stands showed aboveground part> underground part; the variation tendency of biomass in litter layer was the same: decomposed> semi-decomposed> not decomposed, and in different stands , Litter biomass accounted for the largest proportion of forest undergrowth biomass, between 50% and 76%, except for Chinese fir plantation, the remaining three kinds of herbaceous layer accounted for the smallest proportion; total biomass The difference was significant, the Pinus elliottii forest was 28.75 t / hm2, which was significantly larger than the other three stands. The biomass of the living land was the largest in the Pinus elliottii forest, reaching 8.46 t / hm2. The biomass of the saplings was Pinus elliottii> Herbaceous woods> Pinus elliottii> Cunninghamia lanceolata> Cinnamomum camphoraceae> Cinnamomum camphoraceae> Cinnamomum camphoraceae> Cinnamomum camphoraceae> Cinnamomum camphora plantations> With the grass layer.