【摘要】 在测定土壤平衡解吸磷和土壤钾位缓冲容量的基础上 ,根据林木施肥的立地养分效应模型 ,结合林分的目标产量 ,提出了浅海沉积物砖红壤条件下刚果 12号桉 W5的施肥量 ,并布置了肥效校验田间试验 .田间施肥试验表明 :对浅海沉积物砖红壤条件下刚果12号桉 W5 的后期生长 ,单施氮肥和磷肥对胸径和蓄积量生长都无显著性作用 ,增大钾肥的施用量对蓄积量的生长有明显促进作用 .试验区该无性系 6a达到 180 m3合适的配方量是 :N2 85 kg/hm2 ,P62 kg/hm2 ,K185 kg/hm2 .更多还原

【Abstract】 Based on the determination of soil balance absorptable phosphorus and soil potassium buffer capacity, and the site nutrition effect model and target biomass, the amount of fertilization was proposed and a field calibration study was conducted about Eucalyptus ABL12 W5 in the laterite formed by shallow seas sediments. The results showed that (1) Applying N and P individually had no significant effects on the growth of diameter at breast height (DBH) and tree stock of Eucalyptus ABL12 W5 in the later growing stage; (2) Increasing the amount of K remarkablely increased the tree stock growth; (3) To reach 180 m 3 within 6 years, the proposed recipe was N 285 kg·hm -2 , P 62 kg·hm -2 and K 185 kg·hm -2 .更多还原