毕业论文不同经营模式下东北红松天然次生林土壤碳氮库分析.doc

毕 业 论 文 题目： 学 院(系): 林 学 院 专 业 : 生 态 学 班 级 : 20级 学 号 : 学生姓名 : 玲 玲 指导教师 : 林 2014年6月 0~20cm土层显著高于20~40cm和40~60cm土层，土壤碳氮含量和碳氮储量都是随着土层的加深而逐渐减少。4种不同经营模式土壤层（0~60cm）土壤有机碳储量大小为：目标树森林经营模式（228.64t/ha）（205.36t/ha）（200.56t/ha）（182.53t/ha）0~60cm）土壤氮储量大小为目标树森林经营模式（11.35t/ha）传统经营模式（11.17t/ha）调整育林法森林经营模式（11.06t/ha）无干扰森林经营模式（10.19t/ha）。 关键词：森林经营 红松天然次生林 碳储量 氮储量 Analysis of different operation mode of Northeast Natural Korean pine forest soil carbon and nitrogen pools Abstract Carbon and nitrogen is the most important indicator of soil quality, it not only reflects the level of soil fertility, also confirms the basic results of regional ecological evolution and ecological construction. The poor quality of the Northeast Natural Korean pine forest, has been unable to meet the population and social development demand for multifunctional forest ecological, economic and social, how scientific and sustainable management and utilization of natural secondary forest in Northeast, become urgent scientific problem. Based on the traditional forest management regime (FM1), target tree forest management regime (FM2), tree species adjusting forest management regimes (FM3) and no disturbance forest management regime(FM4) to carry on the research of Northeast Natural Korean pine forest soil organic carbon and nitrogen content of reserves. The results showed that: under 4 different operating modes of soil carbon and nitrogen content and carbon and nitrogen storage showed 0~20cm soil layer was significantly higher than that of 20~40cm and 40~60cm soil layer, soil carbon and nitrogen content of nitrogen and carbon reserves are gradually reduced along with the depth of soil. 4 kinds of different operation mode of soil layer (0~60cm) soil organic carbon storage size: target tree forest management regime(228.64t/ha) no disturbance forest management regime (205.36t/ha) traditional forest m