栽种富贵竹致富新财路

富贵竹属龙血树百合科常绿乔木植物,其适应性强,管理粗放,土生、水养皆成活,是非常美丽的新一代室内盆栽观叶植物.富贵竹有曲线流畅的金边彩色富贵竹、体态娇艳的银边条纹富贵竹、表里如一的青衣富贵竹等,成为很有发展前途的新型花卉高效产业.     

空调室内如何养花

选择适宜的花卉种类根据观察发现,花叶绿萝最适宜空调室内,它不但能正常生长,而且可以久育不换,一年不出室也无大碍;其次是红叶标竹、花叶万年青、棕竹、春羽、红背竹芋、散尾葵、绿铁、红铁、苏铁、针葵、龙舌兰以及富贵竹、红背桂、九里香等。草本时花一般不宜进空调室栽培,否则会出现花凋叶枯的现象。要选择健壮花卉入室盆栽植株入室前应下功夫把它培养健壮,只有抗性强,才能耐观耐育。一般入室前半月要施一次尿素水肥,使其生长。生长欠佳的盆花不要入室。花卉入室时间不宜过长摆放时间以20天左右为宜,而后要进行更换。但有些种类时间可长…     

三种不同肥料对金边巴西铁生长的影响

金边巴西铁树(Dracaena fragrans cv.“Lindenii”)是常绿木本观叶植物,其叶片宽大,密生于茎上,叶边缘有黄色纵条,是近年来从外国引入我国并受欢迎的一种室内观叶植物,它在夏秋季生长快速,同时需要养分也多,一般要求提供充足的肥料。本试验通过施用三种不同性质的肥料,测定植物对不同肥料的反应来进一步摸清金边巴西     

彩叶植物繁殖及应用技术

彩叶植物,从狭义来讲,不包括秋色叶植物,它应在春夏秋三季均呈现彩色。从广义上说,凡在生长季节叶片可以较稳定呈现非绿色的植物都可称作彩叶植物。彩叶植物是一类在生长季节或生长季节的某些阶段全部或部分叶片呈现非绿色的植物。1彩叶植物种类1.1根据彩叶保持时间长短分类1)全年彩叶植物,即从叶子发出到叶子脱落一直为彩色。如红叶小檗、金心黄杨、金边黄杨、金叶女贞、紫叶李、洒金柏、红枫、红叶碧桃等。2)季节性彩叶植物,即叶子从发出到脱落,在某一个特定季节是彩色的。如红天竹、变叶木、三角枫、五角枫、元宝枫等。1.2根据生长习性分…     

海南槟榔林下套种切叶花卉品种筛选

在槟榔林下分别套种鸟巢蕨、散尾葵、春羽,对不同基质,不同郁闭度,进行了生长过程研究,结果表明：椰糠、农家肥和槟榔林下原土混合基质,效果最好;70％郁闭度时,切叶花卉生长最好;而鸟巢蕨和散尾葵在槟榔林下生长状态良好,为优选品种。     

龙舌兰科9种观赏植物对苯污染净化能力的研究

采用熏蒸法对龙舌兰科长花龙血树(Dracaena angustifolia)、螺纹铁(D.deremensis‘Compacta’)、青叶也门铁(D.arborea)、金心香龙血树(D.fragrans‘Massangeana’)、细叶百合竹(D.reflexa cv.Pusillifolia)、百合竹(D.reflexa)、千年木(D.marginata)、朱蕉(Cordyline fruticosa)、金边虎尾兰(Sanseviera trifasciata var.laurentii)9种室内观赏植物进行苯污染净化能力研究。结果表明,9种植物均具有净化苯污染的能力;金边虎尾兰单位叶面积苯净化量最大,细叶百合竹最小;长花龙血树整株植物净化苯效果最大(40.3%),千年木最小(6.65%);从植株受害症状表现来看,植物对气体的吸收能力和耐受能力之间并没有一定的相关性。     

散尾葵盆栽管理技术

<正>散尾葵(Palmae chrysalidocarpus lutescents Wendl.)又名黄椰子、凤尾竹,株型优美,叶片轻盈飘逸,四季常青,极具观赏性,是世界上栽培应用最广的棕榈科植物之一,是高级的室内观叶、切叶植物,可配植于建筑物周围、广场、公园、道路、屋顶花园等绿地。1生物学特性散尾葵为棕榈科、散尾葵属常绿植物,灌木或小乔木,茎干光滑,黄绿色,叶痕明显,呈款纹状,基部多分蘖,呈丛生状生长。羽状复叶长40～50cm,叶柄尾部稍弯曲,小叶线形或披针形,长20～25cm,左右侧不对称,叶轴中     

室内大厅立体绿化的植物材料及基质的选择

以花叶蔓长春花、毛鹃、散尾葵、桃叶珊瑚为植物材料,"轻型营养基质"为栽培基质,营造了室内大厅3个楼层立体花坛,进行了4种植物在不同位置、不同的光照环境下成活率测定以及生长状况观察。结果表明:4种植物耐阴性大小顺序为:桃叶珊瑚,散尾葵毛鹃花叶蔓长春花,成为室内立体绿化的植物和基质选择的一个样本。     

琼山云龙岭脚热作场散尾葵早期生长调查研究

通过对岭脚热作场散尾葵生长调查研究,结果表明:散尾葵种植初期生长缓慢,种植3～6个月后生长逐渐加快,1年生可产生利润。苗期怕寒冷、怕强光曝晒,病虫害较少,对土壤要求不严格,以疏松并含腐殖质丰富的土壤为宜。散尾葵切叶每年7～10月为销售淡季,其他时段为销售旺季,按目前来看,具有良好的市场需求。     

水培花卉的生物驯化试验研究

以羽裂蔓绿绒、富贵竹、绿萝、吊兰、君子兰、常春藤6种花卉植物为研究对象，通过对其水培驯化的研究，并利用方差分析，以期达到生物驯化水培花卉的目的。结果表明：与对照（清水）相比，经水杨酸和乙烯利处理的花卉在根长势、根粗度、叶绿素含量和叶片数量等方面，有一定的优势，更能适应水生生活。     

Browsing Damage on Pine (Pinus sylvestris and P. contorta) by a migrating moose (Alces alces) Population in Winter: Relation to Habitat Composition and Road Barriers

In Scandinavia, moose (Alces alces L.) sometimes cause severe browsing damage to economically-important pine. Moose-vehicle accidents have spurred construction of fences along roads, and these may interfere with moose migration between summer and winter ranges, or the road alone may be a barrier. If this happens and moose build up along roads, landowners may suffer economically. Therefore, this study investigated whether roads, fences or other factors influence the use of young pine stands by moose. Eighty stands along roads in northern Sweden were evaluated in which individually-browsed branches were counted on 9972 pines. Moose browsing was not significantly related to birch (Betula pendula Roth, B. pubescens Ehrh.) density, nor did it differ between pines (Pinus contorta Douglas or P. sylvestris L.). However, increased pine density, site productivity and proximity to a highway were associated with increased browsing. Further large-scale studies are needed to understand moose habitat selection and the effects of roads.     

Effects of Root Freezing on the Physiology and Growth of Picea glauca,Picea mariana and Pinus banksiana Seedlings Under Different Soil Moisture Regimes

The root systems of 2-yr-old Picea glauca, Picea mariana and Pinus banksiana seedlings were submitted to various frost temperatures during an artificial frost to induce different levels of root damage. Frost-damaged and control seedlings were placed in a greenhouse under high and low soil moisture regimes. Seedling growth and physiology were evaluated periodically. Seedling survival was reduced when root damage reached levels of 60-80%. Root systems of all three species showed partial to total recovery by the end of the experiment. In general, root freezing damage caused reductions in seedling growth, with these reductions becoming less significant over time. Root damage had little to no effect on black spruce and jack pine seedling physiology, while white spruce CO 2 uptake decreased with increasing root damage. Shoot nitrogen content of all three species decreased slightly with increasing root damage.     

Stand Structure in Pine,Spruce and Deciduous Forests: A Comparison Between Finnish and Russian Karelia

This study investigated the stand structure in pine, spruce and deciduous forests in the border district of Finland and Russia. A total of 46 mature forest stands was selected as pairs, the members of each pair being as similar as possible with respect to their forest site type, age, moisture and topography. The stands were then compared between the two countries by means of basal areas and number of stems. The proportions of dominating tree species were 2-12% lower, and correspondingly the proportions of secondary tree species higher, in Russian forests. The density of the forest stock was also higher in each forest type in Russia. The forests in the two countries differed most radically in terms of the abundance of dead trees. The amount was two to four times higher in Russian deciduous and spruce forests, and in pine forests the difference was 10-fold. The stand structures indicated that Russian coniferous stands, in particular, were more heterogeneous than intensively managed pine and spruce stands in Finland.     

Growth and Terminal Bud Formation in Picea abies Seedlings Grown with Alternating Diurnal Temperature and Different Light Qualities

The root collar diameter and the height:diameter ratio are of particular importance in container-grown seedlings where a high density in the containers may produce spindly seedlings. Temperature regimes and light quality are known to affect plant growth. The aim of this study was to identify responses in Picea abies (L.) Karst. seedlings grown with light providing different red:far-red ratios and under temperature regimes with alternating day (DT) and night temperature (NT) from negative (DT < NT) to positive (DT > NT) difference (DIF) between DT and NT. Experiments were conducted in controlled environment chambers and in a daylight phytotron. Only limited thermoperiodic responses appeared in P . abies seedlings with respect to seedling height and dry weight accumulation. The formation of terminal buds, however, was clearly delayed in seedlings grown at negative DIF. The results indicate a requirement for day extension light that is high in far-red, to prevent terminal bud formation under natural short-day conditions. An extended study should be conducted to clarify the minimum level of light intensity and the optimal light quality needed to prevent terminal bud formation under natural short-day conditions.     

CAD与建筑设计的关系

本文分析了CAD在设计中引起的正面和负面影响,并进行了系统的阐述,从而使设计者在应用中能够保持客观的态度。     

Natural Regeneration in Clear-cuts: Effects of Scarification,Slash Removal and Clear-cut Age

The effects of soil scarification (mounding), slash removal and clear-cut age on the natural regeneration in clear-cuts was evaluated using data from four sites in southern Sweden. The treatments were carried out during a good seed and establishment year for birch ( Betula pubescens Ehrh. and B. pendula Roth). Scarification had the strongest positive effect on the density of naturally regenerated seedlings, especially in birch, but also in pine ( Pinus sylvestris L.) and spruce [ Picea abies (L.) Karst]. Slash removal had a positive effect on birch density. No statistically significant effect of clear-cut age was found. In addition, no statistically significant interactions between clear-cut age and scarification or slash removal were found. The ingrowth of field vegetation was the fastest in areas that were not scarified, less rapid in areas scarified on old clear-cuts, and the slowest after scarification in fresh clear-cuts. In conclusion, it may be possible to control the density of birch during a good establishment year for birch. If birch is desired, the best combination of treatments is to remove the slash and scarify; otherwise, these treatments should be avoided.     

Risk Perception Among Non-industrial Private Forest Owners

Based on an enquiry, risk perception among non-industrial private forest owners is described in relation to climate change and forestry hazards. Of the respondents, 11% took action to remedy the effects of climate change. Out of a given set, hazards were ranked according to each respondent's experience of recent substantial financial loss to the estate and in relation to his or her willingness to make investments aimed at risk reduction. For each hazard, the respondent assessed the risk in four classes ranging from very high to negligible risk. Six hazards were considered most problematic in all three aspects: browsing damage, falling timber prices, damage by wind, spruce bark beetle, root rot and pine weevil. A majority of the respondents claimed to take action to reduce the risk associated with at least one hazard, while 35% did not know whether they did. Excluding climate change, the need for decision support was the largest in relation to damage by wind owing to a combination of perceived high risk and a high level of ignorance in relation to whether risk-reducing measures were taken.     

Interactions in decomposition and N mineralization between tropical legume residue components

In situ produced plant residues contain a mixture of different plant components of varying quality. To assess synergistic or antagonistic interactions occurring during the decomposition and mineralization of such mixtures, individual plant parts (stems, leaves, leaf litter and roots) or the mixture of stems, leaves and leaf litter of the agroforestry species pigeonpea (Cajanus cajan) or of crop residues of peanut (Arachis hypogaea) or of the weed hairy indigo (Indigofera hirsuta) were incubated in pots for 19 weeks. Periodically, remaining plant residues were sieved out (>2 mm), weighed and N content as well as soil mineral N determined. Above- and below-ground residues of peanut decomposed fastest and showed the largest N release in agreement with their high N concentration and low-acid detergent fibre (ADF) : N ratio. Hairy indigo was hypothesized to be of lower quality than pigeonpea because of its high-polyphenol content. However, it decomposed faster than pigeonpea, largely because of the higher N and lower lignin concentration of its components. Ranking of individual plant components for N mineralization resulted in the following pattern, leaves > leaf litter > roots > stems. In mixtures of the different plant components a similar species order in decomposition was obtained, e.g. peanut > hairy indigo > pigeonpea. The amount of N released from the mixture was dominated by stem material that comprised 46–61% of the mixture. The interactions in mixtures were relatively small for peanut (generally high-quality components) as well as for pigeonpea (low proportion of high-quality components, i.e. N rich leaf material). However, a positive interaction occurred during later stages of N mineralization in the mixture of hairy indigo as it had a significant proportion of N rich components and absence of highly reactive polyphenols. Thus, for plants with low to intermediate chemical quality attributes, manipulating plant composition (e.g. by varying harvest age, affecting stem and leaf proportions) will be important to obtain significant interactions during decomposition when its components are mixed.     

Pasture production and tree growth in a young pine plantation fertilized with inorganic fertilizers and milk sewage in northwestern Spain

The use of organic waste materials such as milk sewage as an organic fertilizer could have the dual advantages of organic-waste disposal and reduced dependence on inorganic fertilizers. The effects of fertilization with (1) conventional mineral fertilization, (2) milk sewage sludge at 40 kg N ha⁻¹ target rate and (3) no fertilization on pasture production and tree growth were examined in an experiment consisting of two pasture mixtures under a one-year-old Pinus radiata plantation with a density of 2500 trees ha⁻¹. The two pasture mixtures were: (1) Dactylis glomerata L. var. saborto (25 kg ha⁻¹) + Trifolium repens L. group Ladino (4 kg ha⁻¹) + Trifolium pratense L. var. Marino (1 kg ha⁻¹); (2) Lolium perenne L. var. Tove (25 kg ha⁻¹) + Trifolium repens L. group Ladino (4 kg ha⁻¹) + Trifolium pratense L. var. Marino (1 kg ha⁻¹). The experiment began in the spring of 1995 using a randomized block design with three replicates in Castro Riberas de Lea (Lugo, Galicia, north-western Spain). Plot size was 12 × 8 m², with a 1 m buffer strip between plots. Two-year data showed that fertilization with either material had a positive effect on pasture production, with no significant difference between the two fertilization treatments. Tree growth in the milk sewage sludge plot was significantly higher than in the control plots. Inorganic fertilization increased pasture production, but affected tree growth negatively. The results show that milk sewage sludge could be used as a fertilizer in silvo-pastoral systems. This revised version was published online in June 2006 with corrections to the Cover Date.