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Position: Home > Articles > Study on Forecast of Seed Production of Pinus tabulae formis Carr. in Seed Production Stand Journal of Beijing Forestry University 1992 (3) 27-32

油松母树林种子产量预测的研究

作  者:
薛康
单  位:
北京市林业局造林处
关键词:
油松;种子产量;预测模型;谐波分析法
摘  要:
以山西省雁北地区怀仁县金沙滩国营林场油松母树林为试验地,对历年结实球果数进行调查.结果表明:处于结实初期(10~16年)的母树林,其种子产量与母树年龄的相关关系是极显著的,利用年龄指标即可以预测种子产量.进入结实中期(年龄16年以上)的母树林,其种子产量除受结实周期性影响外,还受气象因素的制约.对于结实周期性影响的部分产量采用谐波分析法求出其表达式,而对于气象因素影响的部分产量则采用逐步回归分析法求出其表达式,两者之和为此期种子产量预测表达式.通过对1990年的预测球果数进行实测检验,精度为93.80%,证实此预测方法是适用的.
译  名:
Study on Forecast of Seed Production of Pinus tabulae formis Carr. in Seed Production Stand
作  者:
Xue Kang(Afforestation Office, Beijing Forestry Bureau)
关键词:
Pinus tabulae formis Carr., seed production, forecast model, harmonic analysis
摘  要:
Annual cones on sample plot were investigated. In the initial stage of fruiting (i, e. 10-16 year) , the relationship between the cone production and the age of seed trees was significant. Thus, it is possible to forecast cone production according to the age of seed trees. In the middle stage of fruiting (i,e.>16 years), seed-bearing cyclicity and climatic elements affect the cone production. It is, therefore,necessary to determine equations of their effects. The eguation of seed-bearing cyclicity was determined by means of harmonic analysis. The equation of climatic elements was obtained by means of step-by-step regression. Following comparison of the actual cone production with the forecasted results for the year of 1990, it is recognized that these forecasts have an accuracy of 93.8%.

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