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1.
几种笋用竹对竹丛枝病的抗性试验研究 总被引：1，自引：0，他引：1
通过对8个笋用竹种对竹丛枝病抗病性试验发现，不同的笋用竹对竹丛枝病的抗病程度有明显差异，早竹、燕竹、雷竹普遍容易感病，属高度感病品种；白哺鸡竹、乌哺鸡竹的抗病性最强。 相似文献
2.
对浙江省临安太湖源竹种园引种的石竹、甜笋竹、雷竹、红竹、黄甜竹、高节竹、角竹、白哺鸡竹、乌哺鸡竹、水桂竹、黄皮刚竹、桂竹、四季竹等13个中小径笋用竹种的出笋成竹规律及其竹笋的营养成分进行观察、测定。结果表明,不同竹种出笋时间和昼夜生长节律不一致,雷竹和石竹笋期较早,黄甜竹、乌哺鸡竹、白哺鸡竹等笋期居中,黄皮刚竹和桂竹的笋期最晚;多表现出白天累计生长量大于夜间累计生长量的规律,而甜笋竹、红竹、水桂竹及乌哺鸡竹的昼夜节律却与之相反。不同竹种的竹笋营养成分含量不同,但均有较高的含水量和蛋白质含量,而脂肪含量较低,氨基酸种类齐全。本研究可为优良中小径散生笋用竹的引种扩繁提供参考。 相似文献
3.
1989年从南平大楼、建瓯新城,福安城关分别引入绿竹、青皮竹、吊丝单。1993年从浙江临安引入雷竹、早竹、角竹、高节竹、红哺鸡竹、白哺鸡竹。1995年从松溪县引入红壳竹和武夷山市大槠村引入四方竹,栽植表现良好,种后第4年郁闭成林投产。由这11种竹组合成高产优质四季笋用... 相似文献
4.
优良食用笋竹种引种地域差异分析与栽培模式研究 总被引：1，自引：1，他引：0
：通过7年引种早竹、高节竹、红哺鸡竹、鸟啼鸣竹、白哺鸡竹等多种食用笋竹栽培的研究，系统分析引种地与原产地地域差异和生长性差异，探索食用笋竹栽培经营模式，对湖南食用笋竹业发展具有重要的意义． 相似文献
5.
１９９４年引种雷竹、早竹、高节竹、石竹、乌哺鸡竹、白哺鸡竹、红哺鸡竹、台湾桂竹、黄甜竹、绿竹、四方竹等１１个竹种。造林成活率、当年发笋率超过对照毛竹的有９个,平均成活率９６．７％、发笋率４９．４％;造林４年有８个竹种立竹度达到中型竹丰产笋用林标准。１９９６年移栽雷竹、早竹,造林３年立竹度达到了８０３０～９７９２株／ｈｍ２,销售母竹收入１０８００元／ｈｍ２,产出投入比１．１２：１。本文介绍引种竹笋期、生长情况、经济效益和栽培技术。 相似文献
6.
优质高产笋用竹种评选和配置 总被引：1，自引：0，他引：1
将我省10个主要的散生竹笋用良种集中成片种植在一起,按笋产量、笋期、笋价、笋个体大小、造林成本、投产年限、综合利用诸因子进行观察、评选,结果看出,最优类为早竹_1,优良类为早竹_2、白哺鸡、红竹、高节竹,角竹次之,石竹、刚竹、五月季、安吉金竹则不属优良范围。目前可以推广的笋用竹林,早熟的有早竹_1,中熟的有白哺鸡和红竹,晚熟的可选高节竹和角竹。考虑经营效益和市场需求,在城市附近及交通方便处,宜发展以鲜食为主的笋用林,竹种搭配以早竹_1为主,辅以中熟品种白哺鸡和红竹,晚熟品种面积不宜过大,在边远山区以生产加工笋罐头为目的笋用竹林,宜以晚熟高产的角竹、高节竹为主及中熟的红竹。 相似文献
7.
１９９０年春季从浙江引种早竹、雷竹、红哺鸡竹、乌哺鸡竹、角竹、高节竹，１９９１年从本省古田县引种黄甜竹。７个竹种引种当年造林成活率达到７６．２％～１００％，平均造林保存率达８６．２％。经过４～５年的培育，１９９５年每公顷竹笋产量达３６４９．５～１６１３５．５ｋｇ，产值达１９５１３．５～６４５４２．０元，经济效益显著，具有推广价值。本文根据试验结果，对其引种造林技术进行了全面、系统的研究与总结 相似文献
8.
采收期对3种笋用竹竹笋营养及氨基酸含量的影响 总被引：1，自引：0，他引：1
为探明不同采笋期对竹笋品质及营养成分的影响,对红哺鸡竹(Phylostachys iridescens)、白哺鸡竹(Ph.dulcis)和黄秆乌哺鸡竹(Ph.vivax'aureocaulis')3种笋用竹不同采笋期竹笋蛋白质、粗纤维、还原糖、灰分含量和氨基酸质量分数进行了测定.结果表明,3种笋用竹竹笋蛋白质干基含量均在310 g/kg以上,红哺鸡竹还原糖干基含量为107.0—188.1 g/kg,而白哺鸡竹和黄秆乌哺鸡竹还原糖含量分别为66.1—117.2,72.1—121.0 g/kg.3种笋用竹竹笋中粗纤维含量为43.0—84.2 g/kg,脂肪为26.0—36.0 g/kg.采收期异同不仅影响竹笋的粗纤维和灰分含量,也会影响到竹笋中蛋白质、脂肪、还原糖,但不同竹种的含量变化有所不同.红哺鸡竹竹笋中脂肪、蛋白质含量随采集时间的推后含量递减,但还原糖含量递增,而白哺鸡竹和黄秆乌哺鸡竹竹笋中脂肪、蛋白质含量随采集时间的变化不明显.3种笋用竹竹笋氨基酸总量(T)变化在13.06—35.4 g/kg,E/T值均在33.0以上.红哺鸡竹竹笋的T值随采收期的延后含量增加,而白哺鸡竹和黄秆乌哺鸡竹竹笋的T值则呈现出随采收期的延后含量递减,儿童必需氨基酸总量(CE)呈现类似的变化.竹笋营养成分和氨基酸的时令变化对于指导竹笋采集和竹林经营具有一定指导意义. 相似文献
9.
黄秆乌哺鸡竹引种研究 总被引：2，自引：0，他引：2
《湖南林业科技》2015,(5)
在湖南益阳进行黄秆乌哺鸡竹引种栽培试验,研究黄秆乌哺鸡竹鞭芽的萌动、竹笋的出笋、退笋、成竹规律及其生物学特性。结果表明:黄秆乌哺鸡适合于湖南益阳山区、丘陵、湖区引种,出笋成竹率高,适应性强。 相似文献
10.
几个优良散生笋用竹种的引种造林技术 总被引：1，自引：0，他引：1
１９９０年春季从浙江引种早竹、雷竹、红哺鸡竹、乌哺鸡竹、角竹、高节竹，１９９１年从本省古到引种黄甜竹。７个竹种引各当年造林成活率达到７６．２％－１００％，平均造林保存率达８６．２％。经过４－５年的培育，１９９５年每公顷竹笋产量达３６４９．５－１６１３５．５ｋｇ，产值达１９５１３．５－６４５４２．０元，经济效益显著，具有推广价值。本文根据试验结果，对其引种造林技术进行了全面、系统的研究与总结。 相似文献
11.
《Scandinavian Journal of Forest Research》2012,27(5):427-435
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. 相似文献
12.
《Scandinavian Journal of Forest Research》2012,27(3):206-217
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. 相似文献
13.
《Scandinavian Journal of Forest Research》2012,27(1):53-61
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. 相似文献
14.
《Scandinavian Journal of Forest Research》2012,27(1):15-27
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. 相似文献
15.
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。 相似文献
16.
17.
《Scandinavian Journal of Forest Research》2012,27(5):472-479
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. 相似文献
18.
Srisuda Thippayarugs Banyong Toomsan Patma Vityakon Viriya Limpinuntana Aran Patanothai Georg Cadisch 《Agroforestry Systems》2008,72(2):137-148
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. 相似文献
19.
A. Rigueiro-Rodríguez M. R. Mosquera-Losada E. Gatica-Trabanini 《Agroforestry Systems》2000,48(3):245-256
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. 相似文献
20.
《Scandinavian Journal of Forest Research》2012,27(2):166-178
This study investigated the forest history, structural characteristics, the presence of fungal species suggested to indicate ecological continuity in old-growth forest, and the species composition of saproxylic beetles in 30 old forest ''woodland key habitats'' (WKHs), and compared them with production forest in the same age-class in south-eastern Norway. No statistically significant differences in forest characteristics, community of saproxylic beetles or number of red-listed beetles were found between the WKHs and the production forest, probably owing to a combination of profound long-term logging and a lack of will to delineate sufficiently large WKHs in the one area with significantly less forestry impact. The study indicates the advantage of including forest history information in WKH selection where such data exist, and the importance of restoring habitats in heavily exploited forest landscapes. 相似文献