在辽西半干旱水土流失地区,为了防止土壤侵蚀和恢复地力,首先应当营造水土保持林。油松(Pinus iabulaeformis)阔叶混交林与油松纯林相比,在改善土壤理化性质、提高土壤抗蚀性有显着效果。与纯林相比,前者土壤含水量可提高13-30%、土壤有机质含量提高7.1-76.4%、土壤微生物数量可增加13-39%、土壤容重减少6.8-10%、土壤水稳性团聚体可提高22.2-124.4%、土壤侵蚀率降低了6.6-26.3%.本地区适宜选择的混交树种有元宝槭(Acer trumcatum)、蒙古柞(Quercus mongolica)、小叶锦鸡儿(Caragana microphylla)等。
In the semi-arid and soil erosion region of western Liaoning, we should develop forests to conserve water and soil above all so as to prevent soil erosion and recover soil fertility. In contrast to the pure forest the Chinese pine mixed forest had obvious superiority in improving physical and chemical as well as antierosion properties of the soils. The mixed forest of Chinese pine and broadleaf trees (including shrubs) could increase soil wetness by 10-30% and humus content by 7-76.4% and decrease the volume weight of the soil by 10%.In addition, the mixed forest of Chinese pine and broadleaf trees could raise the water-stable soil aggregate by 22.2-124.4% and reduce the soil erosion rate by 6.6-26.3%. In this area the suitable species to be used as the mixed trees should include Acer trumcatum, Quercus m ongolica, Caraaana microphylla etc.
何富广,赵荣慧,胡承海.辽西地区油松混交林抗蚀改土效益的研究[J].土壤学报,1994,31(2):170-179. He Fuguang, Zhao Ronghui, Hu Chenghai. IMPROVEMENT AND ANTIEROSION PROPERTIES OFSOILS UNDER CHINESE PINE MIXED FORESTIN WESTERN LIAONING PROVINCE[J]. Acta Pedologica Sinica,1994,31(2):170-179.复制