银中杨生长特性的研究   总被引：3，自引：0，他引：3  

范竹珊  任广英  郭朝霞  许成启  王福森  温宝阳  李晶  李兴业  高凤山  王家君  司海忠 《防护林科技》2000,(2):14-17

通过对银中杨生长特性研究表明 ,银中杨在生长方面超过当地推广树种小黑杨 ,其中材积生长超过小黑杨 73.4 %～ 2 6 9.2 % ;在本地区生长超过目前东北、内蒙及华北地区的优良杨树品种。探讨了银中杨生长规律及适宜栽植密度 ,并对银中杨生长划分 5个时期 ,为合理经营银中杨提供科学依据。  相似文献   

杉木人工林地力衰退研究概述   总被引：6，自引：0，他引：6  

叶学华  YE XUE HUA  罗嗣义  LUO SI YI 《江西林业科技》2001,(6):42-45

介绍了我国杉木人工林地力衰退的现状，从森林土壤条件、杉木人工林的营养循环特点和人为经营措施等方面分析了导致杉木人工林地力衰退的原因，提出营建人工复层林、林地施肥、适当延长轮伐期，加强植被管理和进行定位观测等措施防止地力衰退。  相似文献   

工厂化繁育香菇胶囊菌种专用培养基配方研究     

吴学谦  吴庆其  魏海龙  孙敏华  柳青  李海波  付立忠  朴光旋 《浙江林业科技》2007,27(3):19-21,37

在已筛选出的代料香菇胶囊菌种专用配方LSC1和LSC5基础上,设计了7种香菇胶囊菌种培养基配方,以L26为供试菌株,观察测试了菌丝生长速度、瘤状突起物形成时间与数量、菌种成型及在愈伤培养时的特征以及菌种持水性等特征指标,筛选出了适宜于工厂化繁育香菇胶囊菌种的专用培养基配方LSCG2T和LSCG3,并在胶囊菌种工厂化繁育生产线中进行了应用试验,取得了良好效果。试验结果表明,工厂化繁育胶囊菌种的配方中粗细木屑的比例应提高到5∶1,配方中应添加以提供微量元素和基质物理性能改良剂的辅料。  相似文献   

在韩国片断化林区内道路对小型啮齿类种群的影响     

任信在  李昌培  许位行  朴容秀  崔瑞允  朴仁珠  李宇新 《林业研究》2003,14(2):155-158

The road effect on small rodent population is investigated at 8 fragmented forest areas in the Baekdudaegan moun-tain range, South Korea in September 2001, We especially focused on the distribution and body condition of small rodents near the roads, Korean field mouse (Apodemus peninsulae) seems to be more sensitive to the existence of a road than striped field mouse (Apodemus agradus), Korean field mouse prefers interior forest area to around road. Striped field mouse is a habitat generalist and has wide distributional range around road, but Korean field mouse is forest-inhabiting species and their distribu-tion is limited in forest area. These results suggest the effect of road is different on each small rodent species and their habitat preferences.  相似文献   

林业科技创新、推广与示范体系建设     

龙云英  郑亚东  丁思统 《江西林业科技》2001,(5):36-37

论述了林业科技创新、推广与示范体系建设在林业开发中的重要性，总结了上饶市的实践经验与体会。  相似文献   

厚朴矮林经营技术的初步研究     

刘日林  叶春林  斯金平  刘饶  周建清 《浙江林业科技》2002,22(2):29-31

厚朴伐桩有很强的萌蘖能力，在生长季节采伐也能得到满意的萌芽更新效果，每个伐桩可萌发1－7个萌芽条，7年生厚朴矮林的树干与树枝鲜重达60.2t.hm^-2，平均净生产量为8.6t.hm^-2.a^-1，表明厚朴完全适宜矮林经营，伐桩高度对萌芽条数量，矮林生长影响不大；伐桩萌芽条数量越多，矮林生长越好。  相似文献   

Growth and development of the arborescent cactus Stenocereus queretaroensis in a subtropical semiarid environment,including effects of gibberellic acid     

Pimienta E  Hernandez G  Domingues A  Nobel PS 《Tree physiology》1998,18(1):59-64

In Stenocereus queretaroensis (Weber) Buxbaum, an arborescent cactus cultivated in Jalisco, Mexico, for its fruits but studied here in wild populations, stem extension occurred in the autumn at the beginning of the dry season, flowering and fruiting occurred in the spring at the end of the dry season, and new roots grew in the summer during the wet season. The asynchrony of vegetative and reproductive growth reduces competitive sink effects, which may be advantageous for wild populations growing in infertile rocky soils. Seasonal patterns of sugars in the roots and especially the stems of S. queretaroensis were closely related to the main phenological stages, becoming lower in concentration during periods of major stem extension. Cessation of stem extension occurred in 100-year-old plants for which injection of GA(3) reinitiated such growth. Isolated chlorenchyma cylinders had maximum extension in a bathing solution containing 0.1 &mgr;M gibberellic acid.  相似文献   

德国林业、环境保护和林业管理体制   总被引：1，自引：0，他引：1  

司志超 《林业调查规划》2003,28(3):28-32

介绍了德国：①先进的林业理论和高度发达的林业现状;②公民良好的环境保护意识和环境保护政策;③目前林业的管理体制、管理机构、管理方式以及林业政策的目标和原则。  相似文献   

浅议贵州森林旅游的深层次开发   总被引：1，自引：0，他引：1  

罗庆莲  赵云龙 《四川林勘设计》2002,(2):33-36

在分析旅游文化与贵州森林旅游深层次开发相互关系的基础上，结合贵州森林旅游业发展的实际情况，阐述了贵州森林旅游深层次开发的必要性和可行性，提出贵州森林旅游深层次开发的设想和保障措施。  相似文献   

The effects of poplar (P. trichocarpa × deltoides) on soil biological properties in a silvoarable system     

J. Park  S. M. Newman  S. H. Cousins 《Agroforestry Systems》1994,25(2):111-118

A silvoarable experimental site in Buckinghamshire, England combined rows of poplar trees with an arable rotation. Soil properties were investigated using soil carbon and the bodysize of invertebrates. Four years after establishment, the soil within and 1 m from the tree rows has significantly higher soil organic matter and invertebrate populations. These effects do not extend far beyond the crown diameter.  相似文献