共查询到20条相似文献，搜索用时 249 毫秒
1.
高枝修剪机在修剪过程中锯切力大小不断变化,圆锯片、齿轮副及操作杆承受的作用力和力矩也随之变化,这些因素都会影响修剪杌工作的稳定性.通过对高枝修剪机在工作过程中的运动学和动力学分析,建立相关修枝动力学模型,确定影响锯切平衡的主要因素,为高枝修剪机的结构优化设计提供理论依据. 相似文献
2.
《林业机械与木工设备》2000,(7)
林海集团研制成功草坪修剪机随着人们绿化环保意识的增强，国内草坪修剪机的需求量越来越大。为了满足国内用户的需求，林海集团公司发挥研制生产林业园林机械的优势，最近研制成功了ＣＸ５３０草坪修剪机，并通过了技术鉴定。ＣＸ５３０草坪修剪机以四冲程汽油机为动力，以旋刀方式修剪草坪，作业宽度为０．５３ｍ，并专门配备集草器，整机结构为手推式，可人工推行或靠驱动后轮自行，其主要性能指标达到了国外同类产品的水平，而售价仅为进口机的一半，是园林绿化行业草坪修剪的理想机械。（沈果林）新型自走式喷灌机面市由山西信联集团实… 相似文献
3.
电动绿篱修剪机研制成功 总被引：2，自引：0，他引：2
《林业机械与木工设备》2002,(4)
一种操作简便、省工高效、修剪整齐的电动推走式绿篱修剪机日前由陕西省韩城市建设局园林绿化技术人员研制成 相似文献
4.
XX—42型草坪修剪机是我所林机研究室研制的新产品。XX—42型草坪修剪机采用单缸二冲程汽油机为动力,重量轻、易起动、安全性好、外型美观、工效较高,适合园林、旅游部门和厂矿、单位的人工草坪修剪管理之用。 相似文献
5.
低产茶园改造，是一项较复杂的工作。实践证明，从茶树、土壤和生态环境等方面同时进行综合改造，效果更好。实施常现改造措施1．更新树冠更新树冠常用的技术措施是修剪。南修剪主要用来抑制茶树顶端生长优势，更新树冠上局部出现的细弱分校，是常年生产性栽培技术措施。而深修剪、重修剪、台州、抽刈以及经修留养等方式，则是更新改造低产茶树树冠的重要手段。深修剪：适宜于茶树树冠“鸡爪技”丛生，生产核细弱，育芽能力降低，新梢出现大量的单片和对夹叶，而茶树骨干技仍然生长比较旺盛的茶树。一般应剪去树冠顶部10－15厘米新梢。重修… 相似文献
6.
7.
介绍了湛江市旧城区榄仁树的历史和现状,论述了对旧城区榄仁树修剪的意义,修剪的原则,修剪的时期,修剪机械,修剪的方法和修剪的安全措施等。 相似文献
8.
手持式茶树修剪机手把振动测试与手承受振动的评价 总被引：1，自引：0，他引：1
介绍了ＣＪ－１１０型手持式茶树修剪机手把系统的振动测试研究，并得出一些重要结论，为改进修剪机手把设计提供依据。 相似文献
9.
介绍了ＳＧＣ手动草坪修剪机的工作原理，结构特点及主要参数。该机结构简单，操作方便，体积小，重量轻，携带方便，造价低，节约能源，适合于小面积草坪的修剪。 相似文献
10.
11.
介绍了国内外气动剪枝机的发展现状及特点,在总结分析国内现有气动果树剪枝机存在问题的基础上,对我国气动果树剪枝机的研发方向提出了建议。 相似文献
12.
13.
14.
从茶园的精心培育与管理(包括种植密度、施肥种类及用量配比、修剪时间及方法、抚育管理等)和加工方法的改良(包括加工机械的选择与更新、鲜叶的采摘分级、鲜叶的摊放方法、炒茶工艺及其参数控制)等方面入手,采用对比分析的方法,探索出了浯峰贡茶的栽培管理措施与加工工艺;即采用矮化密植的栽植方式,早施、重施肥料且多施有机肥,提前修剪(改春剪为秋剪)和茶园铺草,能有效地增强茶树的抗旱抗寒能力,提高单位面积的产叶率和优质鲜叶的比例;并将传统的一锅到底的加工方法改变为青锅、摊凉和解锅等多程序炒茶工艺,采用这一技术,特别是在时间、温度、投叶量和含水率等参数上严格控制好,可使生产出来的茶叶成品色绿、形美、香郁、味甜． 相似文献
15.
林茶复合经营研究与应用 总被引：7，自引：0，他引：7
本文系统地总结了林茶复合经营技术的历史沿革、3种应用类型及经营技术、科学研究成果和研究现状, 并就间作茶园树种选择原则、系统结构优化及生态学机理等研究领域提出了新的研究方向。 相似文献
16.
试验以章古台地区沙地栽培的3个品(系)平欧杂交榛(Corylus heterophylla×C.avellana)为试材,研究了重剪、轻剪、自然生长3种修剪措施对平欧杂交榛植株繁殖苗木的数量、基径、高度的影响。结果表明:不同修剪处理都可以提高平欧杂交榛的苗木繁殖数量;重剪处理虽然可以显著提高植株的繁苗数量,但繁殖的苗木基径明显小于轻剪处理,繁殖的苗木高度也显著低于自然生长的植株;不同品(系)的平欧杂交榛植株繁育情况也有差异,82-11繁育数量明显高于84-226和84-254。 相似文献
17.
The effects of various thinning and pruning methods on the density profile and annual ring characteristics of Taiwania (Taiwania cryptomerioides Hay.) using the drilling resistance technique were investigated. The results showed that thinning caused wider annual rings
than medium thinning or no thinning, and pruning caused narrower annual rings than no pruning. Moreover, the thinning treatment
affected annual rings more effectively than the pruning treatment. The average ring density after the thinning treatments
showed a trend as follows: no thinning > medium > heavy. This indicates that thinning reduces the average ring density. The
average ring density after the pruning treatments showed a trend as follows: medium > no pruning > heavy. However, the differences
between thinning and no thinning were not statistically significant. The percentage of latewood in Taiwania after these three
thinning and pruning treatments are shown. The results with silvicultural treatments have the order: medium > not treated
> heavy, but there are no statistically significant differences among thinning, pruning, and thinning where pruning interactions
were observed. Moreover, there were highly significant negative relations between the average ring width and the various ring
densities for Taiwania, but the determination coefficients were small. In addition, there was a highly positively significant
relation between the latewood percentage and latewood width.
Received: November 22, 2001 / Accepted: May 21, 2002
Acknowledgments The authors thank the National Science Council of ROC for financial support through grant NSC-90-2313-B-002-338, and the
Taiwan Forestry Research Institute for their contribution (210).
Correspondence to:C.-J. Lin 相似文献
18.
19.
20.
Stacy M. Philpott 《Agroforestry Systems》2005,64(3):219-224
Reducing or eliminating shade cover in coffee (Coffea arabica L.) agroforestry systems affects fungal disease and pest outbreaks, coffee yields, and can result in biodiversity loss of
important predators, such as ants. Less dramatic changes in shade structure or composition may also affect ants. Shade tree
pruning, a common management practice in shaded coffee systems, has unknown consequences for ant communities. The effects
of pruning on arboreal ant communities were investigated by measuring ant abundance, distribution, and species richness in
the short (1 week) and long-term (6 months) after shade tree pruning in one 25×50 m plot. Shade tree pruning significantly
affected the distribution and abundance of two of the most common ant species (Azteca instabilis F. Smith and Camponotus senex textor Forel), and in general did not affect other ants. After pruning, C. senex textor ants were 80% more abundant on coffee plants and shade trees, whereas A. instabilis abundance dropped by 40% on coffee plants and 73% on shade trees after pruning. Additionally, C. senex textor were significantly more widespread, whereas A. instabilis distributions were more restricted. The effects of pruning were strong over the short-term, but were not evident over the
long-term. Shade tree pruning did not affect ant diversity. Thus shade tree pruning largely affected certain aspects of arboreal
ant communities in one coffee agroforestry system, with important implications for biological control. 相似文献