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杉木生长快、产量高、材质好,是中国亚热带地区最重要的造林树种之一,在中国南方人工林经营中占有重要地位。对8、14和24年生杉木人工林生物量、凋落物及其养分流进行的研究结果表明:杉木人工林具有很高的生物生产力和50%-70%的树干生物量积累比例。杉木是低养分归还的针叶树种,凋落量少,而且针叶凋落前养分发生一定程度的转移,凋落物养分含量低,短轮伐期连栽收获制度造成的养分损失是导致杉木人工林地力衰退的原因之一。图1表7参22。
Cunninghamia lanceolata is one of the most important afforestation species in the subtropical region of China, which occupies an important position in the management of plantations in South China. The results of biomass, litter and nutrient fluxes of 8, 14 and 24 year old Chinese fir plantations showed that the Chinese fir plantation had high biomass productivity and 50% -70% of trunk biomass accumulation. Cunninghamia lanceolata is a coniferous species with low nutrient return, less litterfall, and some nutrients are transferred before coniferous litter. The nutrient content of litter is low. The nutrient loss caused by continuous cropping system with short rotations is the result of the decline of plantation force of Chinese fir plantation One of the reasons. Figure 1 Table 7 参 22.