| 马尾松材积生长量及经济效益的预测 |
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| 引用本文： | 杨祯禄,胡庭兴.马尾松材积生长量及经济效益的预测[J].四川农业大学学报,1993,11(3):404-410. |
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| 作者姓名： | 杨祯禄 胡庭兴 |
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| 作者单位： | 四川农业大学林学系，四川农业大学林学系，四川农业大学林学系 雅安 625014，雅安 625014，雅安 625014 |
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| 摘 要： | 本文研究材料取自广元、巫山、洪雅、威远、荣县等9市县的不同起源及林龄的马尾松材积生长量调查的393个固定与临时标准地。以林龄X为自变量,材生长率Y为因变量,拟合了14个预测生长量的回归式,其中以Y=0.0369+3.8202/X式的相关性最为显著且又符合马尾松的生长规律,故用此式预测了荣县现实的马尾松林分未来10年每公顷材积总生长量可达125.7m~3。全县15037.8公顷的材积总生长量达188.7万m~3,可获产值2.5亿元,收入大于投资的本利和,培育前景与经济效益都极为壮观。
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| 关 键 词： | 材积生长率 生长量(49GE) 马尾松(45NL 49GG) |
FORECAST OF INCREMENT AND ECONOMICAL EFFECTS OF MASSON'S PINE |
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| Yang Zhenglu et al.FORECAST OF INCREMENT AND ECONOMICAL EFFECTS OF MASSON''''S PINE[J].Journal of Sichuan Agricultural University,1993,11(3):404-410. |
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| Authors: | Yang Zhenglu |
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| Abstract: | The material for the research is obtained from different areas in Sichuan Province. The forests in which samlpe plots and stem analysis were completed are with different ages and origins. 14 functions are used for regression analysis with age as variable X and volume increment percent as Y. the function constructed for simulation as following: Y=-0.0369+3.8202/X is the best choice. It is with high precision and in the accordance with growth law of masson's pine. The volume increment and economical effects of masson's pine in Rong County is estimated for 10 years. Growing stock per hectare will De 125.7m~3 and total stock in whole county will be 187000m~3 with the area of 15037.8 hectare. The value will be 250 millions Yuan (Chinese urrency) and the income will be far more than the present value of investment. This shows that the masson's pine forests in Rong County are worth cultiveting and managing. |
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| Keywords: | VOLUME INCREMENT PERCENT INCREMENT MASSON PINE |
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