闽楠容器育苗基质筛选及大田育苗富根壮苗试验

闽楠容器育苗基质筛选及大田育苗富根壮苗试验结果表明:闽楠容器育苗基质最佳配方为泥炭土∶黄心土∶腐熟有机肥∶钙镁磷肥=70∶20∶5∶5。不同浓度GGR6叶面喷施处理后的闽楠大田苗,其苗木根长5 cm的Ⅰ级侧根数、苗高生长、地径生长均有显著差异。考虑到成本因素,宜采用20 mg/L GGR6液连续喷施苗木叶面3次,可使苗木5 cm的Ⅰ级侧根数比对照增加80%以上,苗木高生长比对照增加25%以上,苗木地径生长比对照增加15%以上。     

桢楠容器育苗基质筛选及富根壮苗培育

本研究开展了桢楠(Phoebe zhennan)容器育苗基质筛选及GGR6富根试验。结果表明:桢楠容器育苗基质最佳配比为泥炭土∶黄心土∶钙镁磷肥=60∶35∶5。桢楠大田育苗不同浓度GGR6对苗木进行喷施处理后,其苗高生长、地径生长及苗木根长大于5 cmⅠ级侧根数均有明显差异,宜采用GGR6溶液浓度为100 mg/L进行喷施,比对照,苗高生长增加20%以上,地径生长增加15%以上,苗木根长大于5 cmⅠ级侧根数增加70%以上。富根壮苗出圃率达75%。     

赤皮青冈容器育苗基质筛选及大田育苗富根壮苗试验

开展了赤皮青冈容器育苗基质筛选及大田育苗富根壮苗试验,结果表明:赤皮青冈容器育苗基质最佳配方为泥炭土:黄心土:钙镁磷肥=50:45:5。赤皮青冈大田育苗不同浓度GGR6对苗木进行叶面喷施处理后,其苗木根长大于5 cmⅠ级侧根数、苗高生长、地径生长均有显著差异。考虑到成本因素,宜采用100 mg/L GGR6喷施叶面且连喷3次,在此处理下,相比对照,赤皮青冈苗木根长大于5 cmⅠ级侧根数增加70%以上,苗高生长增加20%以上,地径生长增加15%以上。富根壮苗出圃率达75%。     

乌桕富根苗及育苗密度研究

对1 a生乌桕苗木开展了GGR6促根处理及苗木培育密度试验。结果表明:GGR6处理能显著增加1 a生苗木Ⅰ级侧根的数量,形成乌桕富根苗;随着单位面积苗木株数的增加,苗木的苗高生长增加但地径生长减小。根据试验结果并结合生产实践,乌桕合适的育苗密度为40株·m~(-2);因此,适宜的GGR6处理浓度和适当的育苗密度是培育优质乌桕苗的关键。     

西南桦工厂化轻型基质穴盘育苗试验初析

对西南桦的工厂化轻型基质穴盘育苗技术和常规塑料袋育苗技术(对照)进行了对比试验.结果显示,轻型基质穴盘育苗技术比对照提前2～3d达到出苗率最高峰值;苗高、地径、主根长、Ⅰ级侧根数和大于2 cm的Ⅰ级侧根数分别比对照提高12.7％、7.8％、10.5％、37.7％和63.1％.穴盘培育的苗木的苗高、大于2 cm的Ⅰ级侧根数、主根长和Ⅰ级侧根数与对照差异显著,但主根长与苗高、地径、Ⅰ级侧根数间相关性不显著.以上结果表明,工厂化轻型基质穴盘育苗技术能明显提高西南桦苗木质量,在生产中具有较好的推广应用前景.     

米老排苗木质量分级标准的研究

用主成分分析法确定米老排苗木分级质量指标,采用标准差法和聚类分析法对苗木进行分级,其1年生米老排Ⅰ级苗:苗高115 cm、地径1.10 cm、主根长32 cm,大于5 cmⅠ级侧根数18条;Ⅱ级苗:苗高80~115 cm、地径0.75~1.10 cm、主根长22~32 cm,大于5 cmⅠ级侧根数为12~18条。分析研究结果可为米老排育苗生产和制定地方标准提供参考。     

中国沙棘雌株扦插育苗及GGR应用技术

通过应用GGR浸泡插穗,对中国沙棘雌株扦插育苗成活及生长的影响的研究,结果表明,GGR对中国沙棘雌株扦插育苗成活率、苗高、地径及主根生长有显著影响。用GGR处理插穗的苗木成活率为82.1%,平均高53.83cm,地径0.46 cm,主根长0.26 cm,均高于未处理的苗木。     

木荷轻基质穴盘育苗苗木质量评价及分析

对木荷轻基质穴盘容器育苗苗高、地径等几个苗木性状关系矩阵及主成分分量进行分析,结果表明:木荷1a苗龄容器苗苗高指标的特征向量值达98.09%,是苗木质量评价的主要指标,地径次之。采用标准差法对苗木进行分级:I级苗,苗高>40 cm,地径>0.50 cm,主根长>10.5 cm,根长>5 cm的I级侧根数9条;II级苗,苗高30~39 cm,地径0.40~0.49 cm,主根长9.5~10.4 cm,根长>5 cm I级侧根数6~8条。     

不同浓度微生物肥料对苗木生长情况的影响

在马龙县开展了微生物肥料对3个树种苗木生长量影响试验,结果表明:施"德根贝"微生物肥料对苗木生长有明显的效果,对侧根数、根长和大于5cm一级侧根数有明显的效果,对苗高和地径生长效果不明显,施用浓度以稀释0.2%最好。     

黄樟Pt菌剂育苗对比试验

对比常规育苗,对比Pt菌剂应用于黄樟(Cinnamomum parthenoxylum)育苗的效果。通过调查苗木的苗高、地径、主根长、Ⅰ级侧根数、Ⅰ级侧根长、地上部份鲜重和地下部份鲜重,对数据进行分析,对比二者苗木的生长情况。结果表明:采用Pt菌剂培育黄樟苗木,苗木多项质量指标得到提高,苗木高径比未失衡,反而促进了苗高和地径的协调生长。与对照比较,极显著的缩短主根长度,缩短55.39%,苗高差异达到极显著水平,提高39.08%;地径、Ⅰ级侧根数、地上部份鲜重和地下部份鲜重差异达到显著水平,分别提高42.11%、183.33%、32.29%、131.58%;Ⅰ级侧根长差异不显著,但也提高3.59%。     

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：     

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.     

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。