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应用生长调查和土壤分析法,比较研究了7个造林树种在广东龙门县高岭土石漠化山地的早期生长及其根区土肥力。结果表明:(1)湿地松(Pinus elliottii)和枫香(Liquidambar formosana)存活率高、生长快、长势好;樟树(Cinnamomum camphora)、赤杨叶(Alniphyllum fortunei)和木荷(Schima superba)存活率较高、生长中等;浙江润楠(Machilus chekiangensis)和山乌桕(Triadica cochinchinensis)存活率较低、生长较慢。(2)造林树种根区的土壤肥力显著高于非根区,但不同树种间的差异较大。以樟树根区的土壤肥力最高,浙江润楠和山乌桕的土壤肥力最低。湿地松、枫香、木荷和樟树适于在广东省高岭土石漠化山地植被恢复中应用。
Using the growth survey and soil analysis, the early growth and soil fertility of seven tree species in karst rocky desertification area of Longmen County of Guangdong Province were comparatively studied. The results showed that: (1) Pinus elliottii and Liquidambar formosana had high survival rate, fast growth and good growth; Cinnamomum camphora, Alniphyllum fortunei and Schima superba survived Higher rate and medium growth rate. The survival rates of Machilus chekiangensis and Triadica cochinchinensis were lower and grew slower. (2) The soil fertility of the afforestation root zone was significantly higher than that of the non-root zone, but the differences among the different tree species were larger. The highest soil fertility was in the root zone of camphor tree, and the lowest in the soil fertility of Yunan and Shanwuhu in Zhejiang Province. Slash pine, Liquidambar formosum, Schima superba and camphor tree are suitable for the restoration of karst rocky mountainous areas in Guangdong Province.