Reconstructing past structure and nitrogen accumulation of free populations, and test of its accuracy

重建自由种群过去的结构和氮积累及其准确性

• 批准号: 12640623
• 负责人: OSAWA Akira
• 金额: $ 2.18万
• 依托单位: Ryukoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12640623/
• 关键词: biomass; structural reconstructions; fertilization experiment; stem analysis; allometry; nitrogen; Todo fir

We tested accuracy of the method for structural and functional reconstruction of tree populations from the existing samples, by applying this technique to a 26-year-old plantation of Todo-fir, and comparing the estimated and observed structures of the forests. Sampling was done in Oct. 2000, at a fertilization experiment plots in Hitsujigaoka Exp. Forest in Sapporo. Tree dbh, height and crown length etc. were measured in both control and annually fertilized plots. Then ten trees were felled, and their plant-part biomass values were measured. Stem discs were taken for estimation of sapwood areas. Discs were also collected for stem analysis for estimation of stem volume and growth. Additional sampling was done in Oct. 2001. Then, all samples were analyzed together to develop allometric relationships between tree size and plant part, growth, etc. Tree samples were also collected for analysis of nitrogen concentration: they were dried, ground, then analyzed with the N-C analyzer for N concentration. Time series data of dbh exists for individual trees in the studied stands. With the additional information of tree allometry, we estimated for the total stands, plant-part biomass, leaf area, their growth etc. For the years without plot data, we applied the stand reconstruction method of Osawa et al. (2000), and total stand structure and nitrogen content were estimated. Also analyzed for this calculation were relationships between stem nitrogen concentration vs. sapwood volume, sapwood volume vs. tree size, and stem size distribution. We published two original papers on accuracy of estimates in the theory of stand reconstruction.

我们测试的方法的准确性，从现有的样本的结构和功能重建的树木种群，通过应用这种技术，以26岁的人工种植园Todo冷杉，并比较估计和观察到的森林结构。2000年10月，在Hitsujigaoka Exp.札幌的森林。在对照和每年施肥的试验地，测定了树高、胸径、冠长等。然后砍伐10棵树，并测量其植物部分生物量值。取茎圆片用于边材面积的估计。还收集圆盘用于茎分析以估计茎体积和生长。2001年10月又进行了一次抽样。然后，所有的样品一起进行分析，以发展树木的大小和植物的部分，生长，等之间的异速生长关系。树样品也被收集用于分析的氮浓度：他们被干燥，地面，然后分析与N-C分析仪的N浓度。在所研究的林分中，存在着单株胸径的时间序列数据。利用树木异速生长的附加信息，我们估计了总的林分，植物部分生物量，叶面积，它们的生长等。对于没有样地数据的年份，我们应用Osawa et al.（2000）的林分重建方法，估计了总的林分结构和氮含量。还分析了茎氮浓度与边材体积，边材体积与树的大小，和茎大小分布之间的关系。我们发表了两篇关于林分重建理论中估计精度的原创论文。

项目成果

Matsuura, Y.: "Long-term monitoring study on rain, through-fall and stem flow chemistry in evergreen"Water, Air and Soil Pollution. 130. 1661-1666 (2001)

Matsuura, Y.：“常绿植物中雨水、径流和茎流化学的长期监测研究”水、空气和土壤污染。

Matsuura, Y.: "Soil carbon and nitrogen storage and forest biomass in continuons permafrost region of"Abstract of 3rd International Conference on Cryopedology. 32 (2001)

Matsuura, Y.：“连续多年冻土区的土壤碳氮储存和森林生物量”第三届国际低温土壤学会议摘要。

Osawa, A.: "Feasibility of estimating total stem volume and aboveground biomass from measurement of the largest"Canadian J.of Forest Research. 31. 2042-2048 (2001)

Osawa, A.：“通过最大的测量来估计总茎体积和地上生物量的可行性”加拿大森林研究杂志。

Osawa, A. et al.: "Reconstructing structural development of Even-aged larch stands in Siberia"Canadian J. Forest Res.. 30. 580-588 (2000)

Osawa, A. 等人：“重建西伯利亚同龄落叶松林的结构发展”Canadian J. Forest Res.. 30. 580-588 (2000)

Osawa, A, Abaimov, A.P.: "Feasibility of estimating total stem size distribution from measurement on the largest trees in even-aged pure stands"Canadian Journal of Forest Research. 31. 910-918 (2001)

Osawa, A, Abaimov, A.P.：“通过测量同龄纯林中最大的树木来估计总茎尺寸分布的可行性”加拿大森林研究杂志。