摘要
为对北京市侧柏人工林进行更科学合理的经营规划,在年龄未知的前提下,对北京市怀柔区庙城镇侧柏人工林构建与年龄无关的侧柏胸径生长模型,以便更准确地获取侧柏动态生长信息。基于Logistic、Gompertz和Richards作为基础模型,利用代数差分法构建与年龄无关的侧柏胸径生长模型。结果表明:Logistic、Gompertz和Richards差分模型分别构建的与年龄无关的侧柏胸径生长模型无明显差异,3个模型的决定系数(R^(2))分别为0.4712、0.4662和0.4741,均方根误差(RMSE)分别为1.4460、1.4525和1.4425,其中Logistic差分模型构建的与年龄无关的侧柏胸径生长模型预测值和实际值的相关系数达0.47,3个与年龄无关的侧柏胸径生长模型都能够合理揭示北京地区侧柏生长规律。
In order to make a more scientific and reasonable management plan for Platycladus orientalis plantation in Beijing,an age-independent DBH growth model of Platycladus orientalis plantation in Miaocheng Town of Huairou District of Beijing Municipality was constructed under the premise of unknown age,so as to obtain more accurate dynamic growth information of Platycladus orientalis.Based on Logistic,Gompertz and Richards as the basic model,the age-independent DBH growth model of Platycladus orientalis was constructed by algebraic difference method.The results showed that there was no significant difference in the age-independent DBH growth models of Platycladus orientalis constructed by Logistic,Gompertz and Richards difference models,respectively.The determination coefficients(R^(2))of the three models were 0.4712,0.4662 and 0.4741,and the root mean square errors(RMSE)were 1.4460,1.4525 and 1.4425,respectively.The correlation coefficient between the predicted value and the actual value of the age-independent DBH growth model constructed by the Logistic difference model was 0.47.Three age-independent DBH growth models of Platycladus orientalis can reasonably reveal the growth law of Platycladus orientalis in Beijing.
作者
苏同
马进
Su Tong;Ma Jin(Huairou District Forestry and Parks Bureau of Beijing Municipality,Beijing 101401,China;Zhonglin Forestry Union Planning and Design Consulting Co.,Ltd.,Beijing 100010,China)
出处
《防护林科技》
2024年第5期38-41,共4页
Protection Forest Science and Technology
关键词
侧柏
人工林
生长模型
Platycladus orientalis
plantation
growth model
