一品红引种繁育矮化及花期调控试验

一品红扦插繁育、矮化处理及花期调控试验，结果表明，用20mg/kg生根粉处理使一品红扦插成活率达96％以上；生根期喷施2次1000mg/kg的PP333，平均株高由原来的100cm以上降低到35cm左右，日照9h的短日照处理使花期提前3个月。     

Extent,pattern, and multifunctionality of treed habitats on farms in Vermont,USA

Agroecosystems can serve as multifunctional landscapes when treed habitats such as woodlots, hedgerows, riparian buffers, windbreaks, and orchards, are conserved on farms. We investigated the extent, pattern, and multifunctionality of on-farm treed habitats for 16 Vermont farms in the Lamoille watershed of the Lake Champlain Basin. The site was selected because the land use pattern is representative of the region, containing a mixture of agriculture and forest in different habitat types. We used a GIS-based approach to delineate treed habitats on farms and conducted semi-structured interviews with farmers to explore their perception of the functions of treed habitats. Through an evaluation of the relationship between farm characteristics and spatial attributes of treed habitats, we found farm size to be an important variable. Larger farms had more land in treed habitats, while the pattern of these habitats was more complex on smaller farms. Average elevation of the farm, an indicator of biophysical conditions, was a stronger predictor of the extent of treed habitats than farm characteristics. From interviews, we found that farmers benefited from alternative forest products, both for direct consumption and sale, including firewood, timber, maple sugar, edible fruits and nuts, and wood crafts. Most farmers also recognized cultural and ecological functions provided by treed habitats. These results have implications for developing policies to promote the conservation of treed habitats, considering the preferences of the landowner or farmer.     

贵州兴义市万峰林生物多样性调查

本文对贵州省兴义市的万峰林进行了生物多样性的介绍，其特点为古生物多样性及特有性特别突出，现存生物中特有性、多样性丰富，动植物种高达1445种，国家珍稀动物和植物种类多，植物资源中具有多用途的特点，是生物遗产较为丰富和独具特色的区域。     

敦化林区森林土壤调查

本文对敦化林区范围内的土壤情况进行了调查，确定了林区的土壤类型，提出了今后林业经营的方向。     

经营杠杆以技术支持为支点访芬兰太尔(中国)人造板树脂高级技术服务经理Patrick Anathony

全球胶粘和贴面产品技术的领导者,上世纪80年代,开始了与中国林产工业的合作,中国的重要战略地位,集团总部专门成立了“中国推动委员会”一个有百年历史的国际化公司,拥有独特的企业文化和不变的价值观。     

Landslide densities associated with rainfall,stand age,and topography on forested landscapes,southwestern Washington,USA

Elevated landslide rates in forested landscapes can adversely impact aquatic habitat and water quality and remove and/or degrade soil resources required for forest regeneration. As a result, understanding the associations between management actions, natural factors, and landslide rates is important information needed for land managers. An unusual and powerful storm in early December, 2007, caused record flooding and thousands of landslides across southwest Washington and northwest Oregon, USA, and provided a rare opportunity to examine the effects of both natural factors and forest management practices on landslide density. Landslide inventory data were collected from both aerial photos and systematic field surveys to provide a broad survey database that was used to develop estimates of landslide density and to examine associations between landslide density, precipitation, topography, and forest stand age across a 152,000 ha forested landscape in the Willapa Hills, Washington. We estimated the probability of detecting landslides on aerial photos for six strata defined by forest stand age and a broad range of rainfall intensity, expressed as percent of the 100-year, 24-h, maximum rainfall. Key findings are that landslide detection probability decreased with increasing stand age, but was similar across rainfall intensities. The overall fraction of field-detected landslides that were not detected on 1:12,000-scale aerial photos was 39%. Very few landslides occurred in the 0–100% of 100-year rainfall category, regardless of stand age or slope gradient class. At higher rainfall intensities, significantly higher landslide densities occurred on steep slopes (>70% gradient) compared to lower gradient slopes, as expected. Above ∼150% of 100-year rainfall, the density of landslides was ∼2–3 times larger in the 0–5 and 6–10 year stand age categories than in the 11–20, 21–30, 31–40, and 41+ categories. The effect of stand age was strongest at the highest rainfall intensities. Our results demonstrate that ground-based landslide inventory data are required in order to correct for detection bias from aerial photos, develop reasonable estimates of landslide density across environmental gradients such as rainfall magnitude and topography, and make unbiased interpretations of relationships between forest management associations and landslide occurrence.     

草乌、黄芩、重楼、党参仿生态栽培试验研究

为探索中草药在人工栽培条件下的药材产量、品质和疗效。在双柏县雨龙白竹山半郁闭核桃幼林内,对草乌(Aconitum episocopaleLe′vl)、滇黄芩(Scutellria amoenaC.H.Wringht)、重楼(Paris polyphllaSmith Var.yunnananensis(Franch)Hand-Mazz)、党参(Codonopsis pilosula(Franch)Nannf)4种中草药进行仿生人工栽培试验。结果认为药用根年增重率为:草乌113%、黄芩133%、重楼9%、党参131%。栽培措施对品质的影响为:以P3E1为草乌适宜栽培措施,以A4B4C4为重楼适宜措施,而对黄芩、党参的品质不影响。     

Growth, cold-hardiness, protein content, and digestibility of 70 Leucaena seedlots on three sites in Texas, USA

Seventy seedlots of Leucaena leucocephala, L. pallida, L. diversifolia, L. retusa, L. esculenta, L. confertifolia, L. greggii and L. pulverulenta and various hybrid combinations were examined for survival to freezing weather, biomass production, leaf protein content and in vitro dry matter digestibility in Texas. Three sites along a 600 km north-south transect were chosen to provide a wide range in exposure to freezing weather. The minimum temperature on the warmer Three Rivers site was −7 °C while the minimum temperatures on the colder Vernon site was −14 °C. At the Three Rivers site where −7 °C temperatures occurred and where forage production was a priority and some winter frost damage was not a problem, L. leucocephala K636 and hybrids containing L. diversifolia and L. pallida have the most promise. If total lack of damage to −7 °C is essential, species such as L. retusa, L. pulverulenta (seedlot 61, 62) and hybrids such as L. retusa × L. greggii (53) and L. retusa × L. pulverulenta (55) have the greatest potential. This study examined only one family from each of the cold-hardy species as a parent in the promising hybrids. As extensive intraspecific genetic variation is present within these leucaena species there is great potential to find hybrids with much better combinations of cold hardiness, forage production, leaf protein and dry matter digestibility. This revised version was published online in June 2006 with corrections to the Cover Date.     

几种对蜀柏毒蛾核型多角体病毒增效的添加剂研究

蜀柏毒蛾(Parocneria orientia Chao)是四川省森林第一大食叶害虫,近年来每年都以较大面积的发生,严重威胁长江中上游柏木(Cupressus funebris Endl.)防护林的建设成果.用蜀柏毒蛾核型多角体病毒(Parocneria orientia Nulcear Polyhedrosis Virus,简称PoNPV)防治蜀柏毒蛾危害是我省蜀柏毒蛾生物防治的主要手段,但由于PoNPV产量的限制,使我省蜀柏毒蛾生物防治的发展受到制约.荧光增白剂Tinopal LPW、VBL、灭幼脲等作为增效剂可显著提高昆虫病毒的毒力,达到增效的作用~([1-5]),但利用荧光增白剂VBL、灭幼脲和敌百虫作为蜀柏毒蛾核型多角体病毒增效剂未见报道.     

新疆塔什库尔干有蹄类动物种群密度研究

通过机动车样线和步行样线两种调查方式,采用距离取样方法,对新疆塔什库尔干地区岩羊(Pseudoisnayaur)和北山羊(Capra sibirica)的种群数量进行了调查分析。采用AIC拟合模型分析结果显示,机动车样线调查获得的岩羊密度为2.652只/km2～4.344只/km2,北山羊密度为0.046只/km2～0.070只/km2.步行样线调查获得的密度较低,岩羊密度为0.315只/km2～0.427只/km2,北山羊密度为0.117只/km2～0.175只/km2.机动车样线调查模型中,遇见率在两种有蹄类动物密度差异中贡献最大,从72.6%到98.6%;在步行样线调查模型中,遇见率对北山羊的密度差异贡献最大。群个体数对步行样线有蹄类动物密度差异的贡献率高于机动车样线调查。     

Effects of mangrove deforestation on macrofaunal densities,Gazi Bay,Kenya

This study documents comparative variations of macrofaunal densities in a deforested area and a natural mangrove area in Gazi Bay, Kenya, during 1993. Similar groups of both epifauna and infauna were recorded in the two areas with differences in distribution along transects in different sampling sessions. Hence mangrove deforestation decreases biodiversity. Other more striking effects of mangrove deforestation include a decreased availability of wood, fish and prawn, less revenue paid to government in terms of royalties and tourist fees, an increase in coastal erosion and eventual reduction of seagrasses and coral reefs.     

广州二沙岛宏城公园鸟类调查

为了解广州二沙岛宏城公园鸟类的情况,2017年7月—2018年7月,采用样线和样点法对广州二沙岛宏城公园鸟类进行初步调查,同时采用样方法对植被进行调查。调查结果表明:①共记录鸟类27种,隶属于3目17科19属。其中雀形目种类最多,占总数的92.6%。鸟类区系以东洋界为主,占总数的51.9%;留鸟为主,占77.8%。树麻雀、白头鹎、八哥、暗绿绣眼鸟等为优势种,优势种鸟类多为杂食性;宏城公园鸟类的惊飞距离为2～8.7 m。②鸟类对食源树种具有不同的喜好,公园中最常见、鸟类最喜欢取食的食源树种有11种;乔灌木更容易为鸟类提供食物和筑巢,草地和藤本植物亦可为地面觅食和小型鸟类隐蔽提供场所。其结果可为城市化与鸟类保护相互关系研究提供参考。     

建设生态环保效益型林业实验区的探析

针对在新时期林业实验区如何确定发展方向，提出了建设生态、环保型效益林业实验区要以林业科研、教学、生产为内容，以科技含量有领先地位的各学科实验为基础，并立体开发多种经营，以获得较好的生态、环保、经济效益。     

Old-Growth Trees in Homesteads on the Ryukyu Archipelago,Japan: Uses,Management, and Conservation

Greening in urban areas and forests can provide people with valuable environmental and social benefits. Active involvement by local stakeholders is crucial for effective tree conservation. Our study focused on the past and current uses, management, and conservation of old-growth fukugi (Garcinia subelliptica) trees from the perspective of local stakeholders in rural homesteads on Ryukyu Archipelago, a small island archipelago in Japan. We conducted semi-structured interviews with local communities and local leaders on five small islands and in two hamlets on mainland Okinawa. We found that residents highly valued fukugi homestead trees as windbreaks. Other benefits derived from these trees included traditional dyeing material and green manure. Problems associated with these trees, such as fallen leaves and fruits, and the potential risk of injury caused by strong winds have jeopardized conserving the existing trees. Our results indicate that the value of trees to human wellbeing and society has changed dramatically from largely providing provisioning services meeting local people’s basic needs to regulating services, e.g., protecting the houses from natural disasters, and cultural services. Opinions in terms of services and disservices differed among islands and stakeholders. Accordingly, decision-makers should consider these changes/differences when developing conservation policies. We highlight several alternative uses for old-growth trees, such as tourist attractions, and propose a multi-stakeholder conservation strategy, which will be important for the sustainable management of fukugi trees.     

定位环保 创新营销

定位时尚,从目前的市场表现来看定位时尚是一个非常正确的选择。定位环保,生活质量的提高不仅是量的提高,对家居,是对使用的材料本身品质的提高,也是根本的提高。如果连质量和环保健康都不能够保障的话,一套家居在家里就成了毒家具。因为我们知道