共查询到20条相似文献，搜索用时 125 毫秒
1.
2.
3.
《绿色科技》2017,(7)
指出了区域景观生态安全格局概念的提出,是着力于生态系统的恢复,生物多样性的保护与人文生态安全生的态系统保护与可持续发展的观点。阐述了区域景观生态安全格局中设计与规划,以及建立景观生态安全的方法,以黄帝文化园为例,对于区域生态环境问题的讨论,通过干扰排除和空间格局的规划及管理、恢复生物多样性、保持生态系统结构上的完整性,实现了对此区域内生态环境问题的有效控制和不断改善。研究结果表明:区域景观生态安全格局对于对象的研究上具有针对性,研究尺度上明显具有区域性,研究问题方面则是系统性的。生态系统健康的保持,景观生态安全上的优化,生态系统恢复,以及生物多样性的保护都是区域景观生态所强调的。 相似文献
4.
耿国彪 《绿色中国(综合版)》2005,(11):70-71
浙江省台州市黄岩区是驰名中外的中国蜜橘之乡，作为世界宽皮橘的始祖地之一，黄岩蜜橘以品种繁多，口甘汁浓而著称。1700余年的历史，以及每年大量世界柑橘专家的探访，使黄岩蜜橘增添了许多神秘氛围。2005年11月24日-2005年11月25日，第九届中国’黄岩柑橘节暨中国柑橘博物馆奠基仪式将在黄岩举行。这将是怎样的一场盛会？它对黄岩这一个中国蜜橘之乡又意味着什么？在秋风飘香的时候，本刊记者专程赶赴黄岩，采访了台州市黄岩区人民政府区长徐亦平。 相似文献
5.
6.
7.
8.
以未经干扰的原始甜槠林作对照,运用聚类分析的方法,以生物多样性为标准将各生态系统恢复情况进行了分类,量化了生态系统恢复评价指标,对判断和分析生态系统恢复状况、指导森林生态系统管理提供决策支持. 相似文献
9.
帽儿山地区退化森林生态系统恢复能力评价 总被引：2，自引：1，他引：2
针对帽儿山地区退化森林生态系统实际情况,以原始阔叶红松林为参照,运用多样性指数、构成指数、结构-多样性指数综合评价,通过对帽儿山7个典型示范区的分析,结果表明,示范区6营造樟子松与水曲柳带状混交林的健康恢复状况最好,符合实际情况,为山地退化森林生态系统最优恢复技术的选择提供决策支持。 相似文献
10.
11.
以草业为纽带的桔园生态系统及其生态效益研究 总被引：5，自引：0，他引：5
在浙西红壤桔园套种牧草,建立以草业为纽带的"桔－草－畜（渔）"复合生态系统,对调节园地小气候、减少水土流失、改良红壤、促进畜渔业发展,具有良好的作用,生态、经济、社会效益明显。 相似文献
12.
Mohammad Shaheed Hossain Chowdhury Shampa Biswas Md. Abdul Halim S. M. Sirajul Haque Nur Muhammed Masao Koike 《林业研究》2007,18(1):27-30
Status of organic carbon （C）, total nitrogen （N）, available potassium （K）, calcium （Ca） and phosphorus （P） in three different depths （0-5 cm, 5-15 cm and 15-30 cm） on two hill slopes of 35% and 55% in orange orchard cultivated by the Mro tribe of Chittagong Hill. Tracts （CHTs） were evaluated and compared with those in degraded bush forests, through digging three profiles in each land use. The content of all the five nutrients was found to be higher in the soil of orange orchard than in the soil of forest. But the variation was not consistent for both the slopes. The content varied depth wise also, having the highest value in surface soil in case of both the land uses on both the slopes. A mean available K content was significantly higher in orange orchard than in forest on 55% slope, while it was lower on 35% slope. Surface soil contained the nutrients of K and Ca with the amount of 0.2905-mg·g^-1 soil and 3.025-mg·g^-1 soil respectively in the orchard, while 0.1934-mg·g^-1 soil and 1.6083-mg·g^-1 soil were respectively in the forest. Organic carbon and total nitrogen were found more or less similar in surface soil on both the land uses showing a slight difference. Available P was found only in orange orchard, and in forest it was too little in amount to detect by the spectrophotometer. The degraded forests were poor in nutrient content due to high rate of soil erosion, which would be possible to be improved by bringing it under tree cover as proved by the adaptation of orange orchard there. 相似文献
13.
Mohammad Shaheed Hossain Chowdhury Md. Abdul Halim Shampa Biswas S. M. Sirajul Haque Nur Muhammed Masao Koike 《林业研究》2007,18(3):245-248
The physical properties of soil on two hill slopes of 35% and 55% in orange orchard cultivated by the Mro tribe of Chittagong Hill Tracts （CHTs） were evaluated and compared with those of bushy hill forests. Soil samples were collected from three different depths （0-5 cm, 5-15 cm and 15-30 cm）, digging three profiles in each land use for determining moisture content, organic matter content and particle density. Maximum water holding capacity, field capacity, dry and moist bulk density and porosity were determined only for the surface soils. Moisture content at all the soil depths was significantly higher （p≤ 0.05） in orange orchard than in forest on both the slopes. Orange orchard contained lower mean soil organic matter than forest on 55% slope, while it contained higher values on 35% slope compared to forest. The highest value of the above two properties was found at surface soil in both the land uses on both the slopes, decreasing with the increase of soil depth. On both the slopes maximum water holding capacity and porosity of surface soil and particle density at all soil depths were lower in orange orchard compared to those in forest. Field capacity values of surface soil did not show consistency in trend for the differences between the two land uses on both the slopes. Bulk density value of moist and dry surface soil was higher in orange orchard than in forest on both the hill slopes. 相似文献
14.
为进一步改善旬阳县狮头柑产量、质量,笔者总结了狮头柑建园管理及病虫害防治技术,为实现该产业在旬阳县稳步发展提供参考。 相似文献
15.
脐橙炭疽病发生及其与环境因子关系调查初探 总被引：2，自引：0，他引：2
脐橙炭疽病首次在吉州区林业局果木试验场和兴桥镇长岭果园发现,对脐橙危害极大。该病主要危害脐橙的花、叶、枝、果。脐橙受害后,会引起落叶,枝梢枯死,枝干开裂,树势衰退,蒂枯落果,轻则影响果株生长发育,重则会造成秃株,甚至整株死亡。本文报道该病的症状、生物学特性、发生及其与气候、土壤、肥料、林龄及栽植方法等环境因子的关系,并提出对该病的防治意见和技术措施。 相似文献
16.
根据马家河乡2005年和2010年的土地开发利用数据,采用Costanza提出的生态系统服务功能价值(ESV)计算方法,对其不同利用类型土地的森林生态系统服务功能及森林生态系统单项服务功能的价值进行评估。结果表明:马家河乡土地利用类型变化中,以林地、居住及建设用地等类型变化为主。其中,林地面积减少的最多,其所占国土总面积的比例减少幅度达到11.94%;其次为耕地面积,减少了3.02%;果园、草地水域的面积基本保持不变;而居住及建设用地增幅最大,达到了8.14%。马家河乡土地的森林生态系统的服务功能价值以林地价值减少最多,达到664.5元;果园价值减少459.77元;耕地价值减少188.97元;草地价值减少了64.39元;水域、居住及建设用地和未利用地的价值有不同程度的上升。马家河乡森林生态系统单项服务功能价值中除了森林游憩保健服务功能的价值有所上升,其余各项服务功能的价值均有不同程度地下降。 相似文献
17.
广西荔浦县林下经济发展模式与评价 总被引：1，自引：0，他引：1
荔浦县林下经济发展取得了较好成绩,保护了生态环境,开发了林下资源,提高了林地综合效益。经济总量前5名的模式是：果园红薯藤养猪、林下岩溶及生态旅游、林下反季节香菇、芒编工艺品、森林水资源利用。经济总量虽小但最具地方特色的模式是：林下培植葛麻藤,林间种罗汉果,林间种广西甜茶,林下种石崖茶,林下种灵香草,杂竹养竹鼠等。 相似文献
18.
Cixiang Chen Jihuan Zheng Jinzhao Xie Xiuting Xie Runqian Mao 《Journal of pest science》2009,82(2):155-162
Comparisons between petroleum spray oil (PSO)-based pest management (pest management based on petroleum spray oil) and conventional
pest management were made in a navel orange orchard from 2004 to 2005 in Ganzhou, Jiangxi province, South China. PSO-based
management reduced chemical pesticide use and increased the species richness of natural enemies. To control the key pests
below the economic threshold, PSO use, compared with chemical pesticide, reduced the cost of pest management. PSO had no negative
effects on fruit yield and quality, and could form the basis of a practical and sustainable pest management program in navel
orange.
C. Chen and J. Zheng contributed equally to this work. 相似文献
19.
为了解枣园与大气之间净生态系统碳交换(NEE)特征,运用涡度相关系统、小型自动气象站及HemiView冠层分析系统分别对2017年阿克苏市郊区灰枣园CO2通量、气象因子及叶面积指数进行观测,研究了枣园NEE变化特征、NEE和叶面积指数及气象因子之间的日动态相关性。结果表明:NEE日动态为“U”形曲线。白天NEE为负值,表现为碳吸收,夜间NEE为正值,表现为碳排放。枣园各生育期的晴天与阴天NEE变化特征基本一致。枣园各生育期按照NEE及阶段NEE强度由高到低排序依次为果实发育期、果实成熟期、花期、萌芽期。枣园全生育期叶面积指数和气象因子按照与枣园NEE的相关性由高到低排序依次为叶面积指数、相对湿度、空气温度、光合有效辐射、饱和水汽压差。果实发育期碳交换速率和NEE最大,因此在枣树果实发育期应保证水分和无机盐的供应,对枣园NEE影响最大的因素是叶面积指数。 相似文献
20.