昆明西山林场火烧迹地滇青冈人工幼林生长及土壤养分变化分析

Trees Growth and Soil nutrients change of Young Cyclobalanopsis glaucoide forest at the Burned Area in Xishan Forest Farm of Kunming City

本研究以昆明市近郊的昆明西山林场2008年过火的火烧迹地为试验地,开展滇青冈林的人工造林试验,跟踪调查滇青冈人工幼林的生长情况及土壤养分元素变化情况,研究表明:(1)4年生滇青冈林保存率达到85%以上,且林分平均高达到1.01m,优势高达到2.32m,平均地径达到1.31cm;(2)随着滇青冈林分生长,土壤pH值、水解氮和速效钾显著降低,而土壤有机质及有效磷呈显著增加趋势,土壤中全氮、全钾及全磷的虽有增加,但变化不显著。这说明在滇中地区的适宜地段开展半湿润常绿阔叶林的直接人工营建的可行性,但需加强施肥等抚育管理。

Take the forestland burned in 2008 as the test site in Xishan forest farm of Kunming city,and Cyclobalanopsis glaucoides plantation had been constructed in 2011,and the saplings growth of the tree and soil nutrients had investigated annually.The results showed that:(1)The preservation rate of 4-years Cyclobalanopsis glaucoides plantation was 85% above,the average height of stand was to 1.01 m,the dominant height was 2.32 m,and average diameter at base was 1.31 cm.(2)With the growth of Cyclobalanopsis glaucoides plantation,pH value,hydrolyzed nitrogen and available potassium of soil decreased significantly,the soil organic matter and available phosphorus were increased significantly,and total nitrogen,total potassium and total phosphorus in soil were increased,but the change were no significant.It showed the feasibility of artificial planting directly semi-humid evergreen broad-leaved forests at the suitable areas in the central of Yunnan province,but under the planting it is necessary to improve the forest management including fertilization.