魯中山區(qū)不同立地條件下側(cè)柏、赤松、刺槐生長分析與模擬
發(fā)布時間：2019-03-19 08:50
【摘要】：森林生態(tài)系統(tǒng)在全球氣候變化中占據(jù)主導(dǎo)地位,是地球生態(tài)平衡的重要保證。準(zhǔn)確的監(jiān)測與評價,對于掌握和管理森林生態(tài)系統(tǒng)有重要意義。人工林的生長分析與模擬,可以及時地掌握林分動態(tài)變化,為人工林的經(jīng)營管理和生產(chǎn)實踐提供科學(xué)合理的理論依據(jù)。本研究以山東省魯中山區(qū)側(cè)柏、赤松、刺槐三個樹種為研究對象,分別對六種立地類型進(jìn)行標(biāo)準(zhǔn)地和解析木調(diào)查,采用控制變量法,進(jìn)行方差分析與多重比較,研究不同樹種在不同立地條件下生長狀況,結(jié)果表明:刺槐樹高、胸徑、材積平均生長量均高于赤松和側(cè)柏,赤松高于側(cè)柏;側(cè)柏在陽坡厚土各項生長量最大,在陰坡薄土各項生長量最小;赤松在陽坡各項生長量大于陰坡各項生長量;刺槐在陽坡厚土生長最好;三個樹種在魯中山區(qū)生長狀況良好,刺槐優(yōu)于赤松,赤松優(yōu)于側(cè)柏。研究結(jié)果可為魯中山區(qū)不同立地條件下營造林提供參考依據(jù)。同時,本文以魯中山區(qū)側(cè)柏、赤松、刺槐人工林作為研究對象,將不同立地條件下589塊固定樣地調(diào)查數(shù)據(jù)和142株解析木數(shù)據(jù)按比例分為建模數(shù)據(jù)和檢驗數(shù)據(jù),通過對前人總結(jié)的經(jīng)驗方程篩選單木生長基礎(chǔ)理論模型,采用多元逐步回歸技術(shù)和非線性回歸技術(shù)構(gòu)建側(cè)柏、赤松、刺槐人工林與距離無關(guān)的單木胸高斷面積生長模型、樹高曲線模型、材積生長模型和枯損率模型,結(jié)果表明:模型變量的系數(shù)全部通過t檢驗和F檢驗,P0.05,復(fù)相關(guān)系數(shù)R2均在0.7以上,且殘差分布近似正態(tài)分布并通過模型檢驗,模型擬合效果比較理想。本研究克服以往研究數(shù)據(jù)量偏小、地域局限、缺乏代表性的問題,首次對魯中山區(qū)不同立地類型下側(cè)柏、赤松、刺槐人工林系統(tǒng)分析,成功構(gòu)建魯中山區(qū)側(cè)柏、赤松、刺槐人工林單木生長模型,從數(shù)學(xué)和生物學(xué)上對魯中山區(qū)人工林生長動態(tài)進(jìn)行了客觀地反映,四類生長模型對林木生長過程的模擬精度較高,為魯中山區(qū)人工林今后的經(jīng)營管理和生產(chǎn)實踐提供了重要決策依據(jù),具有較高推廣價值。
[Abstract]:Forest ecosystem plays a dominant role in global climate change and is an important guarantee for the ecological balance of the earth. Accurate monitoring and evaluation is of great significance to grasp and manage forest ecosystem. The growth analysis and simulation of plantation can grasp the dynamic change of plantation in time, and provide scientific and reasonable theoretical basis for the management and production practice of plantation. In this study, three tree species, namely Platycladus orientalis, Pinus pseudoacacia, and Pinus pseudoacacia, were used to investigate the six site types in Shandong Province. The variance analysis and multiple comparisons were carried out with the method of controlled variables, and the results were compared with each other. The growth status of different tree species under different site conditions was studied. The results showed that the height, DBH and volume of Robinia pseudoacacia trees were higher than those of red pine and Platycladus orientalis, and that of red pine was higher than that of Platycladus orientalis. The growth of Platycladus orientalis was the largest in the thick soil on the sunny slope, and the smallest in the thin soil on the overcast slope, the growth of the red pine in the sunny slope was greater than that in the shady slope, the growth of Robinia pseudoacacia in the thick soil on the sunny slope was the best. The three tree species grew well in the middle mountain area of Shandong Province, the black locust was superior to the red pine, and the red pine was superior to the lateral cypress. The results can provide reference for afforestation under different site conditions in the mountainous area of central Shandong. At the same time, the data of 589 fixed sample plots and 142 analytical trees in different site conditions were divided into modeling data and testing data in proportion with the plantation of Platycladus cedar, Pinus pseudoacacia and Pinus pseudoacacia in the central mountain area of Shandong Province. By selecting the basic theory model of single tree growth based on the empirical equation summarized by predecessors, the growth model of high basal area of single tree chest independent of distance was constructed by using multiple stepwise regression technique and nonlinear regression technique, and the growth model of high basal area of single tree chest independent of distance was constructed by using the techniques of multiple stepwise regression and nonlinear regression. The results of tree height curve model, volume growth model and withering rate model show that the coefficients of model variables pass t-test and F-test, P0.05 and R ~ 2 are above 0.7, respectively. The residual distribution is similar to normal distribution and through model test, the fitting effect of the model is ideal. This study overcame the problems of small amount of data, regional limitation and lack of representativeness in the past. For the first time, the system analysis of different site types of Platycladus cedar, red pine and Robinia pseudoacacia plantation was carried out in the middle mountain area of Shandong Province, and the lateral cypress and red pine were successfully constructed. The single tree growth model of Robinia pseudoacacia plantation was used to objectively reflect the growth dynamics of plantation in Luzhong Mountain area from mathematical and biological aspects. The simulation accuracy of the four growth models for forest growth process was high. It provides important decision-making basis for future management and production practice of plantation in Luzhong mountain area, and has high popularization value.
【學(xué)位授予單位】：山東農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：S791.38;S791.245;S792.27
[Abstract]:Forest ecosystem plays a dominant role in global climate change and is an important guarantee for the ecological balance of the earth. Accurate monitoring and evaluation is of great significance to grasp and manage forest ecosystem. The growth analysis and simulation of plantation can grasp the dynamic change of plantation in time, and provide scientific and reasonable theoretical basis for the management and production practice of plantation. In this study, three tree species, namely Platycladus orientalis, Pinus pseudoacacia, and Pinus pseudoacacia, were used to investigate the six site types in Shandong Province. The variance analysis and multiple comparisons were carried out with the method of controlled variables, and the results were compared with each other. The growth status of different tree species under different site conditions was studied. The results showed that the height, DBH and volume of Robinia pseudoacacia trees were higher than those of red pine and Platycladus orientalis, and that of red pine was higher than that of Platycladus orientalis. The growth of Platycladus orientalis was the largest in the thick soil on the sunny slope, and the smallest in the thin soil on the overcast slope, the growth of the red pine in the sunny slope was greater than that in the shady slope, the growth of Robinia pseudoacacia in the thick soil on the sunny slope was the best. The three tree species grew well in the middle mountain area of Shandong Province, the black locust was superior to the red pine, and the red pine was superior to the lateral cypress. The results can provide reference for afforestation under different site conditions in the mountainous area of central Shandong. At the same time, the data of 589 fixed sample plots and 142 analytical trees in different site conditions were divided into modeling data and testing data in proportion with the plantation of Platycladus cedar, Pinus pseudoacacia and Pinus pseudoacacia in the central mountain area of Shandong Province. By selecting the basic theory model of single tree growth based on the empirical equation summarized by predecessors, the growth model of high basal area of single tree chest independent of distance was constructed by using multiple stepwise regression technique and nonlinear regression technique, and the growth model of high basal area of single tree chest independent of distance was constructed by using the techniques of multiple stepwise regression and nonlinear regression. The results of tree height curve model, volume growth model and withering rate model show that the coefficients of model variables pass t-test and F-test, P0.05 and R ~ 2 are above 0.7, respectively. The residual distribution is similar to normal distribution and through model test, the fitting effect of the model is ideal. This study overcame the problems of small amount of data, regional limitation and lack of representativeness in the past. For the first time, the system analysis of different site types of Platycladus cedar, red pine and Robinia pseudoacacia plantation was carried out in the middle mountain area of Shandong Province, and the lateral cypress and red pine were successfully constructed. The single tree growth model of Robinia pseudoacacia plantation was used to objectively reflect the growth dynamics of plantation in Luzhong Mountain area from mathematical and biological aspects. The simulation accuracy of the four growth models for forest growth process was high. It provides important decision-making basis for future management and production practice of plantation in Luzhong mountain area, and has high popularization value.
【學(xué)位授予單位】：山東農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：S791.38;S791.245;S792.27
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