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采用重量法和形态法,于1979—1985年间在广西龙胜县里骆林场调查了两种立地53株22—28年生杉木的根系及地上部分生物量。结果表明:不同立地杉木根系的重量、组成、形态和分布以及主要营养元素都有较大的差异,中坡杉木单株根量比山脊的高266%,全林根量高102%,磷含量高约一倍,根系的组成和分布较合理,中坡吸收根的全量效率是山脊的1.8倍,从而使中坡单株地上生物量比山脊的高181.4%,全林地上生物量高68.6%。山脊杉木生产率低,主要原因是土壤瘠薄,使根系生长发育不良所致。
Gravimetric and morphological methods were used to investigate the root and aboveground biomass of 53 22- 28-year-old Chinese fir (Cunninghamia lanceolata) plants from two sites in the Lailin Forest Farm in Longsheng County, Guangxi Province from 1979 to 1985. The results showed that: the weight, composition, morphology and distribution of main roots and the main nutrient elements in different habitats of Chinese fir were quite different. The root mass per plant of Chinese fir was 266% higher than that of ridges, 102% About doubled, root composition and distribution is more reasonable, the total efficiency of mid-slope absorption roots is 1.8 times the ridge, so that the mid-slope plant aboveground biomass 181.4% higher than the ridge, the whole plant aboveground biomass 68.6% . Ridge fir productivity is low, mainly due to soil infertility, poor growth and development of the root system.