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库布齐沙漠风沙危害及其治理技术 总被引:1,自引:0,他引:1
库布齐沙漠地貌地形复杂,风沙危害十分严重,生态平衡遭到破坏。根据多年治理实践归纳总结出的防风固沙、恢复植被的实用技术,如“前挡后拉”、“旱柳高杆造林”、“封沙育林育草措施”、“飞播造林恢复植被法”等乔灌草相结合的防风固沙植被建设模式,具有典型性和广泛应用价值。 相似文献
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半干旱风沙风蚀区樟子松造林技术王继宏,杨凤英(山西省杨树丰产林局)(省林业厅)近年来山西杨树丰产林局在樟子松引种成功的基础上,结合生产实践对在半干旱风沙风蚀区采取抗旱抗风害樟子松造林技术,开展了一系列的科研工作,并在生产中推广应用,造林成活率、保存率... 相似文献
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平潭县是我国强风区之一,风沙危害十分严重,给当地人民带来过深重的灾难,50多年来,通过造林绿化,全县风沙危害基本得到控制。章就风沙地造林绿化技术进行了探讨,旨在为今后在风沙地开展造林绿化提供借鉴。 相似文献
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风沙危害是朝阳市的主要自然灾害之一,严重威胁、困扰生态环境和经济建设,直接影响人们的生产生活。该文分析了朝阳地区的风沙危害,并提出具体的治理对策,改善朝阳地区的生态环境和生产条件,加快经济建设,提高人民的生活水平。 相似文献
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近年来 ,日益恶化的生态环境已严重制约了我国社会经济的发展。今年的沙尘暴又一次向我们敲响了警钟。造成风沙危害、水土流失严重的根本原因是一边治理 ,一边破坏 ,抵消了建设成果。三北防护林建设实践证明 ,要根治风沙危害和水土流失 ,根本途径在于植树种草 ,尽快恢复林草植被。 相似文献
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赵阳 《绿色中国(综合版)》2011,(17):46-48
新建朔州至准格尔铁路位于山西省朔州市、忻州市和内蒙古鄂尔多斯市境内,通过陕西省府谷县北部边缘,地处蒙晋陕毗邻接壤之地。沿线经过的库布其沙漠呈东西带状分布,属于风沙危害区域,冬春季节,风沙危害十分严重。 相似文献
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福建省沿海地区桉树造林应对台风危害主要技术措施 总被引:3,自引:1,他引:2
近年来,众多桉树学家对桉树的耐寒性进行许多卓有成效的研究,但对桉树抗风性的研究则进展甚微。实际上,避免或减轻台风对桉树的危害已成为福建省沿海地区今后一段时期内学术界重点关注的焦点之一。文章提出了采用大容器育苗、深挖穴、适当深植、双植、下足基肥、科学追肥、林缘木修枝、选择合适林地、考虑种植行向、适当稀植、馒头状培土、机械加固、控制生长、选择抗风品种、保留植被等15条主要技术措施,并阐述了灾后的补救措施,旨在为降低台风造成的危害提供借鉴。 相似文献
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The clear cuts and seedling stands can speed up winds and may trigger blowdown at the edges of neighbour stands. Therefore, the height contrast of the neighbour stands and fragmentation at landscape level could be used to indicate the susceptibility of windthrow. In this study, we studied how forest fragmentation affects the susceptibility of a boreal forest ecosystem to wind damage, both at patch and landscape level based on theoretical computations. For this purpose we generated, based on real stand inventory data of a Finnish forest ecosystem, different landscape configurations of Scots pine and Norway spruce forests using Monte Carlo simulation. Thereafter, we applied a mechanistic wind damage model to predict the wind speeds needed for wind damage at forest edges. The fragmentation metrics of Contrast-Weighted Edge Density with three different height dissimilarity calculation methods were used to analyze the fragmentation at the landscape level. 相似文献
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沙漠地区农业种植技术初探 总被引:2,自引:1,他引:1
沙漠地区在没有造林或造林初期防护效益不显著情况下,农业种植受风沙危害比较严重,提高农业种植产量是我们面临的一道难题。本文对中国林科院沙漠林业实验中心井灌区第四实验场风沙环境和三年来的种植情况进行分析,得出农业防风害的措施有以下几个方面:农作物品种的选择;种植时间的调整;以增加起动风速为目的的各项抗风害措施的采用;以减小风沙流强度和目的的阻沙林和固沙工程的建造。这些措施能有效地减小和防止风沙灾害的发 相似文献
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为避免新造林地的野兔为害,保护退耕还林、还草成果,对野兔习性做了简要介绍,并对兔害综合防治进行了初步研究,认为食物引导、生态自控、保护驱避和除治杀灭几种兔害防治措施的综合运用,可达到有兔不成灾的效果。 相似文献
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以宁夏中卫迎水桥地区防风固沙体系内土壤剖面形态观察和土壤理化性质分析为依据,结合土壤环境因子分析,揭示人工固沙条件下土壤形成的主要过程,研究了各成土因子在成土过程中的作用,为人工促进流沙固定、加速土壤形成和固少林带更新提供科学依据。 相似文献
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We simulated how possible changes in wind and ground-frost climate and state of the forest due to changes in the future climate may affect the probability of exceeding critical wind speeds expected to cause wind damage within one northern and one southern study area in Sweden, respectively. The topography of the study areas was relatively gentle and the forests were dominated by Norway spruce (Picea abies (L.) Karst.) and Scots pine (Pinus sylvestris L.). Using estimated changes in the net primary production (NPP) due to climate change and assuming a relative change in the site productivity equal to a relative change in NPP, we simulated possible future states of the forest under gradual adjustment of the site index in response to climate change using the model The Forest Time Machine. Global climate change scenarios based on two emission scenarios and one general circulation model were downscaled to the regional level. The modified WINDA model was used to calculate the sensitivity of the forest to wind and the probability of wind damage for individual forest stands for the periods 2011–2041 and 2071–2100 and for a control period 1961–1990. This was done while taking into account effects on stability of the forest from expected changes in the occurrence of ground frost. Increasing sensitivity of the forest to wind was indicated for both study areas when adhering to recommended management rules of today. Adding also a changed wind climate further increased the probability of wind damage. Calculated probabilities of wind damage were generally higher in the southern study area than in the northern one and were explained by differences in wind climate and the state of the forests, for example with respect to tree species composition. The indicated increase in sensitivity of the forest to wind under the current management regime, and possibly increasing windiness, motivate further analysis of the effects of different management options on the probability of wind damage and what modifications of Swedish forest management are possibly warranted. 相似文献
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黑龙江西部低山丘陵区应用保水剂造林适宜施用量试验研究 总被引:1,自引:0,他引:1
保水剂不同施用量的盆栽梯度试验与不同拌种比例的直播造林试验的结果表明:随着保水剂施用量的增加,植苗造林维持苗木成活生长时间逐渐延长,其中维持新植苗木持续成活生长15天左右的施用量分别为:小黑杨(2根1干)10~12 g,丁香(2年实生苗)8~10 g,樟子松(2年实生苗)6~8 g;直播拌种造林则随着加拌保水剂比例增大,胡枝子出苗量逐渐提高,1∶10、1∶15及1∶20比例与对照差异显著,当年苗高同时逐渐提高,1∶10比例与对照差异显著。通过与人工浇水比较,在保证造林成活率的前提下,植苗造林施用保水剂可分别节约造林抚育成本:小黑杨1142.5元/hm2、丁香1110元/hm2、樟子松1353.34元/hm2。 相似文献