摘要
凋落物消耗量对于计算林火强度,预测林火扑救难易程度等具有重要意义。不同凋落物类型在不同条件下其消耗量不同,为了调查凋落物消耗量影响因素,并建立相应预测模型,以8种凋落物(华山松、柳杉、麻栗、马尾松、毛竹、云南松、青冈栎、杉木)为研究材料,在室内铺设不同含水率、载量和厚度的凋落物床层,研究平地无风条件下含水率、载量和厚度对不同凋落物消耗量的影响,并建立消耗量预测模型。结果表明:华山松、柳杉、马尾松、毛竹、云南松、杉木的消耗量主要受载量影响,而青冈栎消耗量主要受含水率影响,麻栗与其3个影响因子相关性都不显著;云南松、柳杉、马尾松的消耗量预测模型预测效果较好,调整后的R^2分别为0.825、0.756、0.795;华山松、杉木、毛竹、青冈栎的消耗量预测模型预测效果较差,调整后的R^2分别为0.241、0.377、0.621、0.509、0.718;而麻栗因3个影响因子与消耗量无显著关系,未能建立预测模型。
Litter consumption plays an important role in calculating the intensity of forest fire and predicting the difficulty of forest fire fighting.Different litter types have different consumption under different conditions.In order to understand the influencing factors of litter consumption and establish corresponding prediction models,eight litters(Pinus armandi,Cryptomeria fortune,Quercus acutissima Carruth.,Pinus massoniana,Phyllostachys edulis,Pinus yunnanensis,Cyclobalanopsis glauca and Cunninghamia lanceolate)were used as research materials to lay litter beds with different moisture content,fuel load and thickness indoor,and to study the effect of moisture content,load and thickness of different litters on consumption,and a prediction model of litter consumption was established.The consumption of Pinus armandi,Cryptomeria fortune,Pinus massoniana,Phyllostachys edulis,Pinus yunnanensis and Cunninghamia lanceolate was mainly affected by the fuel load;the consumption of Cyclobalanopsis glauca was mainly affected by the moisture content,and the correlation between Quercus acutissima Carruth.and its three influencing factors were not significant.The prediction models of consumption of Pinus yunnanensis,Cryptomeria fortune and Pinus massoniana were better with R^2 of 0.825,0.756 and 0.795,respectively.The prediction models of consumption of Pinus armandi,Cunninghamia lanceolate,Phyllostachys edulis and Cyclobalanopsis glauca were poor with R^2 of 0.241,0.377,0.621,0.509 and 0.718,respectively.However,there was no significant relationship between the three factors and consumption of Quercus acutissima Carruth.,so the prediction model could not be established.
作者
满子源
胡海清
郭妍
宋红
Man Ziyuan;Hu Haiqing;GuoYan;Song Hong(Northeast forestry University,Harbin 150040)
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2019年第12期41-44,共4页
Journal of Northeast Forestry University
基金
林业公益性行业科研专项(201404402)
关键词
凋落物
消耗量
床层含水率
床层厚度
预测模型
Litters
Consumption
Moisture content of lay bed
Load of lay bed
Prediction model
