杉木火力楠混交林的生态效益研究

本文通过对6年生杉木火力楠混交林的2年定位观测研究,结果表明:与杉木纯林相比,混交林提高了凋落物的数量和质量,培肥了土壤,改善了林内小气候,提高了水源涵养功能,降低了林分燃烧性。混交林是我国南方改良地力,科学经营杉木多代连栽地的有效生物措施之一。

Studies on Ecological Benefit in Mixed Stand of Chinese Fir and Macclure

The results of 2 years' fixed position observation of 6-year-old mixed stand of Chinese fir and Macclure indicate that, in contrast with Chinese fir, the amount and quality of the litter in mixed stand increase, the bulk density of 0-20cm top soil and of 20-40cm subsoil decrease by 5.4% and 12.76%, the total porosity increase by 5.1% and 6.40%, 0.25mm conposition of soil aggregate increase by 5.0% and 1.7%, the soil destruction rate reduces by 3.32% and 5.14%, and organic materials increases by 0.5574% and 0.8382% respectively; and that condition of forest microclimate is improved, function of water conservation is raised and combustibility is dropped. And it also in-dicates that mixed stand has higher ecological benefit, that cultivated mixtures after Chinese fir replanting is an effective biological measure for improving soil fertility and for scientific managing Chinese fir repeated plantation wood land.