红花尔基樟子松林细小可燃物载量与林分因子关系研究     

江西军  柴一新 《森林防火》2007,(3):23-27

主要对红花尔基樟子松林地表细小可燃物与林分因子之间的关系进行研究.红花尔基地区位于中国北方森林草原交错带,主要为樟子松绝对优势的森林及森林草原群落.在对红花尔基樟子松林的过火林分、未过火林分和森林草原交错群落细小可燃物载量大小比较的基础上,通过自由度调整复相关系数值R2以及AIC准则和Cp准则挑选最佳回归模型,建立了该地区森林可燃物载量与林分因子之间的回归模型,并对所建模型都进行了方差分析,主要得出以下结论(1)细小可燃物总载量大小顺序过火林分＞未过火林分＞森林草原交错群落;(2)死可燃物载量大小顺序过火林分＞未过火林分＞森林草原交错群落;(3)地表活可燃物(草本)载量大小顺序森林草原交错群落＞未过火林分＞过火林分;(4)通过引入林分平均林龄、平均胸径和平均树高三个林分因子建立死可燃物载量和细小可燃物总载量的多元线性模型,取得了最好的拟合效果,预测精度都分别为98.7%和98.64%,(5)通过用林分平均林龄和细小可燃物总载量建立的对数曲线模型,有一定的生物学意义,预测精度为99.45%.  相似文献   

Anatomical variations in wood among four native species of Leguminosae grown in arid areas of China   总被引：1，自引：0，他引：1  

Yang Shu-min Jiang Ze-hui Ren Hai-qing Ikuo Furukawa 《中国林学(英文版)》2007,9(1):39-44

Morphological features and anatomical variations are described and illustrated in detail for four native species of Legumi-nosae grown in arid sandy regions in China, which are Hedysarum scoparium Fisch.et Mey., Caragana korshiskii Kom., Lespedeza bicolor Turcz. and Ammopiptanthus mongolicus (Maxim. ex Kom.) Cheng f. All species showed similar morphological features: distinct growth ring boundaries, ring to semi-ring-porosity, simple perforation plates, alternate intervessel pitting, nonseptate fibers, para...  相似文献   

CaCl_2处理对奈李低温贮藏期生理生化的影响     

苏冬梅  谷文众  陈灿  邓江望 《中南林业科技大学学报(自然科学版)》2001,(2)

为了探明 Ca2 对奈李低温贮藏的保鲜效应 ,对奈李采用不同浓度的 Ca Cl2 溶液处理、聚乙烯薄膜袋包装、在低温 ( 5℃ )下贮藏 ,研究其生理生化变化情况 .结果表明 :采用质量分数为 0 .5 %～ 1.0 %的 Ca Cl2 溶液处理 ,对奈李的呼吸作用、Vc含量的降低、可溶性固性物的消耗、电导率和 POD(过氧化物酶 )活性的升高以及贮藏期的失水等均具有抑制作用 ,而用较高浓度的 Ca Cl2 ( 2 .0 %～ 6.0 % )溶液处理 ,则具有相反的作用 .  相似文献   

珍稀濒危植物──蝟实果实形态构造特点研究   总被引：1，自引：0，他引：1  

梅秀英  姜在民  贾丽  曲式曾 《陕西林业科技》1996,(4)

对国家三级保护植物实（ＫｏｌｋｗｉｔｚｉａａｍａｂｉｌｉｓＣｒａｅｂｎ）果实的形态结构特点进行了研究，并就其种子形态结构特点与植物珍稀濒危的关系进行了初步探讨。  相似文献   

汽车车厢底板用竹木复合板的研制   总被引：6，自引：1，他引：6  

朱一辛  蒋身学 《木材工业》1996,10(3):4-7

采用马尾松作芯板、竹片作表板、酚醛树脂作胶粘剂，制造汽车车厢底板用竹木复合板。在确定的涂胶量、热压温度、热压时间条件下，研究了不同的热压压力与竹木复合板性能的关系，得出了适宜的热压工艺条件。研究结果表明，竹木复合板的物理力学性能达到林业行业标准ＬＹ１０５５—９１规定的指标值，为充分、合理、经济、有效地利用竹木资源提供了依据  相似文献   

蓝桉幼林施肥效应研究   总被引：1，自引：0，他引：1  

何蓉  曾芳群  蒋云东  陈德艾  赵明寿  王萍 《西部林业科学》1997,(3)

在云南省保山市石灰岩红壤地区进行了历时4年的蓝桉幼林N、P、K不同配比的10种处理施肥试验。结果表明，施肥能明显促进蓝桉（Eucalyptusglobulus）幼林的生长；其中处理6、9、10增产效果极显著，树高增加16．31％～20．40％，胸径分别增加18．78％～19．21％，材积增加65．04％～70．19％。有机肥对蓝桉生长有促进作用，施过有机肥的处理10生长始终保持优势；磷肥是蓝桉增产的主要因素，每株施430g钙镁磷肥做底肥能使树高、胸径分别增加14．67％、15．87％，每株施215g钙镁磷肥则树高、胸径分别增加11．44％、7．83％；氮肥各水平间无差异，增产效果不明显；钾肥1、2水平间无差异，3水平可能过量，阻碍了肥效发挥。施肥能提高蓝桉生产的经济效益，较好的几个处理依次为6、9、2、10、3产出投入比值均大于对照。综合以上几个因素，N2P3K2为蓝桉幼林的最佳施肥方案。  相似文献   

Risk management: A probe and study on forest fires     

Jinzhu Yue  Zhongke Feng  Wei Jiang  Xiaoqin Yang 《Frontiers of Forestry in China》2007,2(3):335-339

The subject of risk management is attracting more and more attention around the world. The risk of forest fire disasters should be faced and dealt with for forest fires cannot be avoided. Treating forest fire disasters as a risk management issue promotes important measures and methods for fire fighters to prevent, reduce and control the risks of forest fires. In this paper, the risk concept and risk connotation as well as the management risks for forest fire suppression are discussed clearly. Issues such as risk judgments, risk analysis, risk control and the assessment of risk, including their contents and corresponding methods are clarified. Translated from Forest Resources Management, 2006, 2: 24–27 [译自: 林业资源맜理]  相似文献   

果戈里大街沥青混凝土路面裂缝的原因与防治     

盖玉杰  江阿兰 《森林工程》2005,21(2):33-34

针对哈尔滨市南岗区果戈里大街的路面设计、施工状况的调查,分析了沥青路面裂缝原因与几个因素的关系,并结合有关资料提出一些防治措施。  相似文献   

落叶松木材的高强度微波辐照法改性   总被引：1，自引：0，他引：1  

LIU Hong-Hai WANG Qing-Wen YANG Lin JIANG Tao CAI Ying-Chun 《林业研究》2005,16(3):237-240

The larch wood was treated by microwave irradiation under different radiant intensity and treating duration. The microwave-treated wood specimens together with the un-treated for comparison were impregnated by water in pressure vessel and then tested for permeability, mechanical properties and microstructure change by SEM to study the modification performance of microwave treatment on larch wood. The results showed that under suitable conditions of microwave treatment the permeability of larch wood was improved without noticeable decreasing of the modulus of rupture （MOR） and the modulus of elasticity （MOE）. The radial parenchyma and some pit membrane were ruptured, and tiny cracks were formed in the cell walls. The formation of tiny cracks in the cell walls serves as man-made channels of gas and liquid and this contribute to improve the permeability of the wood.  相似文献   

A COMPARATIVE STUDY BETWEEN FAUNA OF HEILONGJAING(CHINA)AND ALBERTA PROVINCE(CANADA)     

Gao Zhongxin Gao Erhu ZouHongfci JinKun SuJinbaoNortheast Foresty UniversityJiang ZhigongAlbeta University  Canada 《林业研究》1993,4(1):64-68

Heilongjing(China)and Alberta(Canada)provinces are situated at the same lati-tude,with similar nature conditions.Mammals in Alberta account for 87 species and in Heilongj-ing,97 spesics,among which a number of orders,families and species are in common.Continentsof Eurisia and North America histoi cally were connected and separated for several times,sothere are a number of animal forms in common,among them the similarity of herbivores is rath-er high.The similarity index of cervidae is 0.54.Other orders with comparatively similarcompiosition are Insevtivora,Chiroptera and Lagomorpha.In two orders,there are no commonspecies.In these two regions,duc to historical reasons,a number of specific genera and specieswere formed.  相似文献