建柏人工林生物量的研究

为了探讨营造建柏人工纯林的生长效果，在三明莘口教学林场小湖工区３４年生建柏人工林内设立标准地，以平均木法调查乔木层生物量及其分配，以样方法调查灌木层和草本层的生物量。结果表明：建柏人工林生物量为２４１．６１４ｔ／ｈｍ＾２，其中乔木占９７．１１％，灌木层占０．７０％，草本层占０．７４％，凋落物层占１．４５％。乔木层各器官生物量大小顺序为：干（６２．４８％〉根系（１６．６９％）〉枝（１０．３３％）〉皮

Biomass and Its Allocation in a 34-year-old Fokienia hodginsii Plantation

In order to estimate the growth status of 34-year-old pure man-made Fokienia hodginsii forest. plots were established, the biomass of stratums was measured by the mean tree method. and that of shrub and herbage were measured by the quadrat method. The results indicated that the gross standing crop in a 34-year-old Fokienia hodginsii plantation was 241. 614 t/hm2. biomass of stratum layer accounted for 97. 11%. and that of shrub. herbage and litter layer occupied 0. 70%. 0. 74% and 1. 45%, respectively. Biomass allocation of tree stratum decreased in the order: stem(62. 48%) >root (16. 69%) >branch (10. 33%) >bark (8. 58%)>leaf (l. 92%). The net productivity of tree stratum layer was 6. 900 t/(hm2. a). The living branches mainly distributed between 11~ 20 m. deadwood between 8 ~ 12 m. and leaves between 15 ~ 20 m. The ratio of leaves and living branches increased with height rising. It was concluded that Fokienia hodginsii is a quite fast-growing tree specie that is suited for amelioration of low-yield forest of Chinese fir.