杉木与阔叶树混交试验初报  

PRELIMINARY REPORT ON THE MIXED FORESTS OF CUNNINGHAMIA LANCEOLATA WITH THREE KINDS OF BROAD-LEAVED TREES

作　　者：谭绍满[1] 徐英宝[1] 陈红跃[1] 符国荣 李茂祥 

机构地区：[1]华南农业大学林学院,国营云涌林场

出　　处：《植物生态学报》1995年第2期183-191,共9页Chinese Journal of Plant Ecology

摘　　要：在高明县国营云涌林场以３∶１的混交比例，分别营造杉木（Ｃｕｎｎｉｎｇｈａｍｉａｌａｎｃｅｏｌａｔａ）与红荷木（Ｓｃｈｉｍａｗａｌｌｉｃｈｉｉ）、木荷（Ｓｃｈｉｍａｓｕｐｅｒｂａ）、火力楠（Ｍｉｃｈｅｌｉａｍａｃｃｌｕｒｅｉ）３种混交林，经过６年的调查观测表明：混交３年后种间关系开始激化，６年以前要适时修枝、截顶、间伐，调整１—２次种间关系。混交林与纯林比较：０—３０ｃｍ土层养分消耗较大，但林分生物量高，有较高的林分生产率；６年生的混交林枯落物量及其养分元素含量、含水量比纯林大；０—１０ｃｍ表层Ｎ、Ｐ、Ｋ含量有增加趋势。这些混交类型，宜从现有的３∶１比例，扩大至４∶１或５∶１，尤以杉木＋火力楠的类型值得推广。Cunninghamia lanceolata trees were mixed with Schima wallichii, Schimasuperba and Michelia macclurei,respectively, to examine the effect ot mixingtype (tree species composition) and mixing mode(species ratio)on soil fer-tility in the Yunyong Forest Station of Gaoming County, Guangdong Provi-nce, These forests were investigated for 6 consecutive years after planting. The results showed that interspecific competition started to appear after thetrees were planted for three years. Twig-trimming, top-pruning,and sele-ctive lopping, at least once or twice before the trees were 6 years old, wererequired to regulate the interspecific relationship, hence weakening the com-petition between species. In comparison with the pure forest stands, the mixed forests removed more nutrients from the soil, as indicated by a declinein the concentrations of major nutrient elements (N, P,K)in the top 30 cmsoil, and had higher biomass and productivity.After 6 years, the litterfalland nutrients in the litter began to increase,Moreover, the mixed forestshad higher soil moisture content,and higher total and available N,P,Kconcentrations in the top soil(0 10cm)than the pure stands.We recom-mend that the mixing ratio between Cunninghamia lanceolata and broad-leavedtree species be increased from 3 ∶1 to 4∶1 or 5∶ 1.

关 键 词：混交林 杉木 红荷木 木荷 火力楠 阔叶树 

分 类 号：S791.270.2[农业科学—林木遗传育种] S718.551[农业科学—林学]