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1移植时间:三月中旬至四月下旬.
2移植地点:起挖前先为大树选好
栽植位置,最好选在背风向阳处.立地条件差的首先进行改换土. 相似文献
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大树移植能在短时间内取得快速和高效的景观效果,所以,大树移植技术己广泛的用于现代园林绿化中。大树移植首先对大树合理的选择,在适宜的季节里,充分做好移植前的准备工作,制定移植方案;之后采用恰当的包装运输方法,并协调好起挖吊运,定植各个环节;最后做好关健性的一步:养护管理,对大树进行后期的各项保养和防护工作,可大大提高大树移植的成活率。 相似文献
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2002~2004年我们移植了胸径为20~52 cm的香樟大树90多株,树龄最大者近100 a,成活率达100%。在移植前采取了大树的选择、截干、断根、封口保水及移植时间的确定等移植前的准备工作,栽植方法(包括挖穴、浇水、覆土、树皮保护等)和栽后养护等一套关键技术。 相似文献
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为追求绿化效果及其他一些原因,在园林施工中,大树的移植越来越普遍,因工期、栽植季节等因素及采取的方法不当,技术措施、养护管理不到位,移植后的树木成活率很低,造成物力、人力、财力的大量浪费.从大树的选择、移植时间、移植准备、移植过程和移植后的养护管理等方面进行阐述,提出了大树移植技术操作规程,以提高大树移植的成活率. 相似文献
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近几年来为了满足城市景观的需要,让城市变得更漂亮,越来越多的大树"被移进城"。城市的发展给一些不法之徒带来了"商机",即非法盗挖或移植大树。2011年4月2日央视《经济半小时》就播出《大树古树"被"下山》的一期节目。如果大树、古树继续这样被人为地破坏,我们人类的生存空间将会变得越来越狭窄。本文对移植大树、古树的行为暂且不论,在此,笔者仅结合实际对如何合理适用法律办理盗挖林木案件作一探讨。希望能抛砖引玉,给大家带来一些启发。观点如有不妥之处,希望赐教。 相似文献
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2006年10月用全挖法和分层分段挖掘法,研究了窄冠刺槐根系的分布特征、根系生物量以及不同密度林分根系空间分布特征.结果表明:窄冠刺槐个体根系水平分布在株间可达到6.6 m,在行间可达到5.0 m;主根可深达2 m以上,侧根垂直分布集中在10~40 cm土层内.窄冠刺槐根系生物量占全株生物量的16.82%,主根、侧根的生物量在根系生物量中分别占87.13%、12.87%.窄冠刺槐林分根系生物总量和根总长分别为6 160.2~10 940.55kg·hm-2和970.35~1 607.4 km·hm-2,并呈现出根系生物总量和根总长与林分密度成正相关的规律.在垂直方向上,林分根系中直径D<15 mm的根主要分布在地下0~20 cm土层内,而直径D≥15 mm的根主要分布在地下20~40 cm土层内;在水平方向上,直径D≥5 mm的根数量随距树干距离增加而减少,而直径D<1 mm的根数量则随距树干距离增大而增大,主要集中分布在距树干0.5~1.5 m范围内. 相似文献
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为寻找岷江柏木最佳的种质资源保存方式,以马尔康市天然起源岷江柏木为对象,从岷江柏木移植试验入手,结合已有的岷江柏木种质资源保存方法,进行了两方面研究:1)探讨了不同移植时间、不同树龄、不同修枝比例对岷江柏木移植的影响。试验共移植216株个体,1 a后成活8株,成活率3.70%。主根发达、须根偏少,土壤贫瘠且砾石含量多,移植施工的直接伤害、移植地环境难以完全相似等因素,直接影响到岷江柏木移植的成活率。2)比较了原地保护、异地移植、采种育苗、存入种质资源库等岷江柏木种质资源保护方式。提出在原地保存不可行的情况下,应优先采取采种育苗,结合入库保存等方式保护岷江柏木种质资源。 相似文献
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挖坑机造林使用效果分析 总被引:1,自引:0,他引:1
童庆辉 《林业机械与木工设备》2011,39(9)
分析了BFW490型背负式挖坑机在福建省三明市梅列区陈大镇林场挖坑造林的使用效果。结果表明:利用挖坑机造林能够大幅度提高工作效率,当挖坑直径为200mm(以下简称1200)和300ram(以下简称1300)时的工效分别是人工挖坑处理(以下简称CKJL)的5.40倍和4.78倍。每667m^2(亩)植树造林单挖坑环节1200、J300处理比CKR分别节省1.38和1.36工日;投入成本j200、j300仅为CKR的40.4%和44.4%,72004300可以减少投入成本55.75元和52.01元。不同处理造林10年生生长量存在差异,挖坑采用j200、j300处理与CKR处理相比平均胸径分别提高了2.4%和4.8%;平均树高分别提高了3.8%和1.3%;蓄积量都提高了12.9%。在闽西北山地使用挖坑机造林是一条切实可行的造林新途径。 相似文献
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Exploring below ground complementarity in agroforestry using sap flow and root fractal techniques 总被引:2,自引:0,他引:2
C. K. Ong J. D. Deans J. Wilson J. Mutua A. A. H. Khan E. M. Lawson 《Agroforestry Systems》1998,44(1):89-106
Indices of shallow rootedness and fractal methods of root system study were combined with sapflow monitoring to determine
whether these ‘short-cut’ methods could be used to predict tree competition with crops and complementarity of below ground
resource use in an agroforestry trial in semi-arid Kenya. These methods were applied to Grevillea robusta Cunn., Gliricidia
sepium (Jacq.) Walp., Melia volkensii Gürke and Senna spectabilis syn. Cassia spectabilis aged two and four years which were
grown in simultaneous linear agroforestry plots with maize as the crop species. Indices of competition (shallow rootedness)
differed substantially according to tree age and did not accurately predict tree:crop competition in plots containing trees
aged four years. Predicted competition by trees on crops was improved by multiplying the sum of proximal diameters squared
for shallow roots by diameter at breast height2, thus taking tree size into account. Fractal methods for the quantification of total length of tree root systems worked well
with the permanent structural root system of trees but seriously underestimated the length of fine roots (less than 2 mm diameter).
Sap flow measurements of individual roots showed that as expected, deep tap roots provided most of the water used by the trees
during the dry season. Following rainfall, substantial water uptake by shallow lateral roots occurred more or less immediately,
suggesting that existing roots were functioning in the recently wetted soil and that there was no need for new fine roots
to be produced to enable water uptake following rainfall.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
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Narcisa Urgiles Paúl Loján Nikolay Aguirre Helmut Blaschke Sven Günter Bernd Stimm Ingrid Kottke 《New Forests》2009,38(3):229-239
Most tree species in tropical mountain rain forests are naturally associated with arbuscular mycorrhizal fungi. Previous studies
in southern Ecuador of 115 tree species revealed that only three species were not associated with arbuscular mycorrhizal fungi.
Seedlings of tropical tree species raised in the nursery may need to be associated with arbuscular mycorrhizal fungi to survive
transplantation shock in higher numbers. Methods for establishing plantations with native tree species are not yet established
for Ecuador. Thus, we investigated the feasibility of using mycorrhizal roots of seedlings of Inga acreana, Tabebuia chrysantha, Cedrela montana and Heliocarpus americanus that had trapped mycorrhizal fungi from forest humus in the nursery to inoculate C. montana and H. americanus with native arbuscular mycorrhizal fungi. Inoculation with either a mixture of mycorrhizal roots from the four species or
only with mycorrhizal roots from the same tree species were compared with effects of moderate fertilization. Assessment of
plant growth and mycorrhizal status of 6-months-old Cedrela montana and Heliocarpus americanus revealed an improvement in growth and diverse associated fungi through mycorrhizal root inoculation in comparison with moderate
fertilization. Moderate fertilization did not suppress mycorrhization. 相似文献
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大理市华山松大树移植技术措施 总被引:4,自引:0,他引:4
介绍华山松移植的情况及必要性,对大理市华山松大树移植的移植时间、植株选择、移植树木挖掘和包扎、装卸和运输、栽植等一系列技术措施进行了阐述.对栽后的浇水、施肥、管护和病虫害防治等管护措施也作了概述. 相似文献
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3种整地措施下尾巨桉幼林生长及土壤有机质变化特征研究 总被引:1,自引:0,他引:1
对不同整地措施下尾巨桉幼林林分生长及土壤有机质变化研究表明:炼山全垦与带垦措施下林分平均地径极显著大于穴垦,但炼山全垦与带垦之间地径差异不显著;炼山全垦措施下的林分平均树高极显著高于带垦与穴垦;而林分蓄积量则为炼山全垦>带垦>穴垦。炼山全垦整地后,土壤有机质在表层土壤以下10~20 cm或20~30 cm均有不同程度的增大。土壤有机质含量在造林后1 a时3种处理间的差异不显著,但造林后1.5 a后发现炼山全垦有机质含量极显著优于带垦和穴垦,其次为带垦,穴垦最差。从目前来看炼山全垦的生长及土壤有机质含量占有较大优势。 相似文献