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fire prevention tree
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This paper deals with the techniques of astablishing fire prevention belts of fruit trees. The results thow that to devide the forests into blocks by building major and minor fire prevention trees belts among them and the fruit tree belts at the foot of the forests, thus forming a dosed fire prevention net work, is an Fruitful engineering easy to be put into practice, which can minimize the losses caused by the fir if any.

本文通过山区山脚田边果木防火林带营造技术的研究,结果表明:建立主、副防火林带和山脚田边果木防火林带,把森林分割切块,形成闭合的防火网络,是一种易推广、多效益的防火生物工程。能把山火造成损失降到最低限度。

Through the measure of moisture content,crude fat crude ash, sillica,volaule oil, burningpoint,combustion heat’ burning speed,etc. , of the leaf and methed of A、I、D. , 37 species ofconiferous and broadleaf tress are divided into six grades according to their fire-resistance proper-ty, The four species including Trachycarpus fortunei,Michelia macclurei var, Sablbnea ete, arein the first grade, their fire-resistance property are the best. The nine species belong in the second grade. Pinus massoniana....

Through the measure of moisture content,crude fat crude ash, sillica,volaule oil, burningpoint,combustion heat’ burning speed,etc. , of the leaf and methed of A、I、D. , 37 species ofconiferous and broadleaf tress are divided into six grades according to their fire-resistance proper-ty, The four species including Trachycarpus fortunei,Michelia macclurei var, Sablbnea ete, arein the first grade, their fire-resistance property are the best. The nine species belong in the second grade. Pinus massoniana. Platycladus orienrtalis and Cryptomeria fortunel belong in the sixth grade their fire-resistance property are the worgt, The results as above finally indicate the fire-re-sistance regulation of the main coniferous and broadleaf trees in south China and provltie the theo-retical evidence for the selection of fire-prevention tree species.

本文对福建37种针阔树种鲜叶含水率、粗脂肪、粗灰分、SiO_2、挥发油含量和燃烧热值、燃点、燃烧速度等10个因子进行测试,并应用A、I、D方法将37个树种依因子的不同取值范围划分为6个抗火性能等级。其中棕榈,火力构等4个树种为一技,抗火性能最强;毛栲、木荷等9个树种为二级,抗火性强;格氏栲、丝栗栲等15个树种为三级;抗火性能最差的六级是马尾松、侧柏等3个树种。本研究探讨了南方主要针阔树种抗火性规律,为建立防火林带树种选择提供了理论依据。

In this paper, the caloric amount of main fire prevention tree species and Chinese fir & Masson’spine is studied comparatively. The results show that the total caloric amount and volatile caloric amount ofmain fire prevention tree species are lower than those of coniferous tree species,among which those of Schi-ma superba are the lowest.The multivariate regression analysis indicates that the main factors affecting leafcaloric amount are benzene-alcohol abstract, lignin,coarse ash content.etc....

In this paper, the caloric amount of main fire prevention tree species and Chinese fir & Masson’spine is studied comparatively. The results show that the total caloric amount and volatile caloric amount ofmain fire prevention tree species are lower than those of coniferous tree species,among which those of Schi-ma superba are the lowest.The multivariate regression analysis indicates that the main factors affecting leafcaloric amount are benzene-alcohol abstract, lignin,coarse ash content.etc. under the absolutely dry condi-tion.

通过对主要防火树种与杉木、马尾松发热量的比较研究表明,防火树种的总发热量与挥发份发热量均比针叶树低,其中以木荷为最低。多元回归分析表明,在绝干条件下,影响树叶发热量的主要因于是苯—乙醇抽取物、木质素与粗灰分等。

 
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