实施封山育林新规程应处理好的几项关系——以云南省为例

根据国家最新公布的<封山(沙)育林技术规程>,即由GB/T 15163-2004替代GB/T 15163-1994后,因封山育林的对象、内容、技术、要求等发生了变化,因此要处理好以下新的问题:①封山育林的内涵及对象.②封山育林对象与适宜条件的关系.③与封育目的目标的关系.④与封山育林技术的关系.⑤与合格标准的关系.     

营造林总体设计规程

前言 本标准代替GB／T 15782-1995《集约经营用材林基地造林总体设计规程》。 本标准与GB／T 15782-1995相比，主要变化如下： ——标准名称改为《营造林总体设计规程》，将总体设计客体“集约经营用材林基地造林”改为“营造林”，扩大了标准的适用范围；     

遥感影像平面图制作规范

本标准代替GB15968-1995《遥感影像平面图制作规范》。本标准与GB15968-1995相比主要变化如下：——按照GB／T1．1—2000《标准化工作导则第1部分：标准的结构和编写规则》的要求对标准进行了修订;     

中华人民共和国国家标准1：5001：10001：2000地形图数字化规范

本标准代替GB／T17160-1997《1：500、1：1000、1：2000地形图数字化规范》。     

新疆主要造林树种苗木质量分级

本标准按GB／T1．1-2000《标准化工作导则第1部分：标准的结构与编写规则》的有关要求、在GB600-1999《主要造林树种苗木质量分级》的基础上、结合新疆主要造林树种苗木生产条件并考虑今后发展需要而编写。     

全国人造板标准一览

一、现行的我国人造板标准1纤维板难燃中密度纤维板GB/T18958-2003中密度纤维板GB/T11718-1999薄型硬质纤维板LY/T1205-1997浮雕纤维板LY/T1204-1997硬质木纤维瓦楞板LY/T1203-1997硬质纤维板GB/T12626-1990地板基材用纤维板LY/T1611-20032刨花板刨花板GB/T4897.1~4897.7-2003石膏刨花板LY/T1598-2002定向刨花板LY/T1580-2000模压刨花制品(家具类)GB/T15105-1994船用贴面刨花板LY/T1057-19913胶合板胶合板GB/T9846.1~9846.8-2004集装箱底板用胶合板GB/T19536-2004竹编胶合板GB/T13123-2003汽车车厢底板用竹材胶合板LY/T…     

对GB/T449.7-1998圆锥滚子轴承规定画法的探讨

对GB/T449.7-1998圆锥滚子轴承规定画法进行探讨,并以GB/T297-1994-30206中圆锥滚子轴承为例,提出圆锥滚子轴承定义及其具体作图步骤。     

地理标志产品 金玉三捻橄榄(DB44/T676—2009)

前言本标准根据国家质量监督检验检疫总局颁布的《地理标志产品保护规定》和GB/T17924-2008《地理标志产品标准通用要求》而制定。本标准的附录A和附录B均为规范性附录。     

核桃苗木

前 言 本标准依据GB/T1.1-2000《标准化工作导则第一部分:标准的结构和编写》相关要求编写. 本标准代替DB65 2038-2003. ——将术语与定义中的部分内容、分级要求、检测方法、检测规则中的有关内容直接引用DB65/T2201-2014《新疆主要造林树种苗木质量分级》标准; ——修改了苗木标签的规定; ...     

新疆维吾尔自治区地方标准DB 65/T2036—2019 巴旦木苗木

正前言本标准依据GB/T1.1-2000《标准化工作导则第1部分:标准的结构和编写》的相关要求编写。本标准代替DB65 2036-2003。——将术语与定义中的部分内容、分级要求、检测方法、检测规则中的有关内容直接引用DB65/T2201-2014《新疆主要造林树种苗木质量分级》标准;——修改了苗木标签的规定;     

盆栽观赏竹培育技术研究

结合实施浙江省“九五”课题“丛生竹笋与观赏竹开发研究”,从浙南丰富的竹类资源和发达的社会经济之实际出发,对我国盆栽观赏竹种的筛选、母株选择、处理、挖掘、生长管理、成景管理以及盆土和竹盆选择等系列环节做了配套研究,为开发浙南丛生观赏竹资源提供技术措施和母竹种质。     

Strategy for screening eucalypts for saline lands

We present a new approach for selecting seed sources of Eucalyptus to be grown on saline land. We evaluated our method using 22 seed sources, 11 tree-form species and 11 mallee-form species. We found that the commonly used strategy of selecting seed sources on the basis of average productivity was inappropriate, as average productivity was poorly correlated with the relationship between productivity and salinity that was actually observed. Using our new approach, we categorized seed sources as salt-sensitive or salt-tolerant based on the strength of the observed relationship between salinity and productivity. Seed sources defined as sensitive were associated with relatively large (−24.8 to −64.2%) productivity losses, while the changes in productivity for tolerant seed sources ranged from −17.1 to 10.5%. On average, reductions in height due to increased salinity were about 30% greater for sensitive seed sources than tolerant ones, although the effect was smaller for mallee-form and greater for tree-form seed sources. The difference between sensitive and tolerant seed sources was similar after 1, 2 and 4 years of growth.     

行业精英纵论 2004 实业前线预测 2005

关于中国木制品市场的观点。刚刚在大连参加了2004年中国木制品进出口贸易洽谈会,我对中国作为一个多种木制产品的来源地有了更加崭新的认识随着我们对于把中国当作一个潜在的木制产品原材料产地的兴趣的增长,我很高兴的看到会议谈到了关于木制产品认证的话题．为了保护濒临灭绝的森林和保证将来的木材需要,Home Depot首先于1999年发表了它的木材购买政策你可以在HomeDepot的主页：     

请给百姓一份安全食品菜单

“民以食为天”,“人命关天”,这两句古话阐明了食品安全无以复加的重要性。实际上,食品安全的重要性还远不止于此,这个问题不仅关系到人的健康和生命,而且关系到经济发展、社会稳定,乃至公民对整个社会和政府的信心。     

请给百姓一份安全食品菜单

“民以食为天”，“人命关天”，这两句古话阐明了食品安全无以复加的重要性。实际上，食品安全的重要性还远不止于此，这个问题不仅关系到人的健康和生命，而且关系到经济发展、社会稳定，乃至公民对整个社会和政府的信心。[编者按]     

An Ecological Framework for Planning for Forest Health

Concerns for maintaining biodiversity have led to the adoption of ecosystem management as the paradigm for federal land management. This approach will identify desired future conditions as the goal for management, based on ecological objectives for a given landscape. Some management efforts attempt to identify desired future conditions based on existing successional stages as defined by a classification of overstory vegetation types. Such an approach ignores most of the underlying ecological parameters of the landscape, and is inadequate for identifying past disturbance regimes and future successional pathways. An assessment of desired future conditions based on an ecological classification system is essential to overcome these inadequacies. The strategy proposed in this paper uses an appropriate ecological land classification, based on either ecological land types or habitat types, included in a broader hierarchical classification system. It also uses a vegetation map of existing overstory vegetation. These two maps are overlaid to generate polygons of ecological units that can then be used to create an ecosystem diversity matrix. Each polygon (stand) can be evaluated as to its composition and structure relative to its possible placement within the ecosystem diversity matrix through comparisons with historical ranges of variability. The overall ecosystem diversity matrix can then be examined in terms of the distribution of successional stages within each habitat type or ecological land type. The goal should be to maintain at least adequate ecological representation of all successional stages within each habitat type that occurred historically, based on past disturbance regimes. Adequate ecological representation is defined as sufficient size and distribution of inherent ecosystems to maintain viable populations of all endemic species dependent on these ecosystems. This approach can maintain and enhance regional biodiversity, but also maintain flexibility in land management options.     

植物组培内生菌污染的防治措施

文章对植物组织培养中的内生菌污染和外生菌污染的区别和内生菌在植物体内的分布种类进行阐述,对组培内生菌污染的危害特点、发生原因及防治措施等进行归纳综述,以期为植物组培内生细菌污染的预防和控制提供参考。     

12个桃品种的花芽休眠需冷量和开花需热量

在浙西南地区研究12个桃品种花芽休眠需冷量和开花需热量生态指标.犹他模型测定结果显示:12个桃品种中,花芽休眠需冷量低的品种为春蜜、超红、中油11号、中油7号、中油4号,约为550～650 cu;其次是丽油5号、仓方早生、燕红、丽油3号、早凤凰,约为650～ 800 cu;需冷量高的品种为新川中岛和赤月,约为900～ 950cu.同一地区不同品种需热量差异较大,同一品种年际间差异相对较小.以生长度天模型试验结果表明:开花需热量低的品种为赤月和丽油3号,大约400 ～ 500 d·℃;其次是新川中岛,大约500～600 d·℃;春蜜、丽油5号、早凤凰、中油4号、中油7号、仓方早生和燕红大约600 ～ 700 d·℃;需热量较高的是中油11号和超红,约为700～800 d·℃.12个桃品种花芽休眠需冷量与开花需热量之间呈乘幂函数曲线显著负相关.