共查询到20条相似文献,搜索用时 156 毫秒
1.
2.
3.
香樟在临沂城市绿化中引种栽培的潜力探讨 总被引:4,自引:0,他引:4
香樟Cinnamomum camphora(Linn)Presl,具有较高观赏和经济价值,亦是南方城市园林绿化中广泛应用的常绿树种。为丰富北方园林树种组合,香樟亦在临沂地区开始引种,但由于受引种地温度和土壤条件因素的影响,香樟在临沂地区的栽培受到一定的限制。作者根据香樟在临沂地区引种栽培的实践,深入探讨了临沂地区香樟引种栽培的潜力,影响香樟在临沂地区扩大栽培的主要原因,并提出了香樟在临沂地区扩大栽培应用有关技术措施。 相似文献
4.
香樟是南方城市园林绿化中广泛应用的常绿树种,长江流域是它分布的最北缘。由于近20 a来全球气候变暖,香樟亦在苏中和苏北地区开始大量引种,但由于受引种地温度和土壤条件因素的影响,香樟在盐城地区的栽培受到一定的限制。根据香樟在盐城地区引种栽培的实践,深入探讨了盐城地区香樟引种栽培的潜力,影响香樟在盐城地区扩大栽培的主要原因,并提出了香樟在盐城地区扩大栽培应用有关技术措施。 相似文献
5.
初步调查了淮海经济区香樟引种应用现状,对比分析了香樟自然分布区与淮海经济区气候及土壤条件差异,由此提出了在淮海经济区引种香樟的措施及建议。 相似文献
6.
7.
关中平原区香樟越冬冻害成因研究 总被引:2,自引:0,他引:2
2009-2011年在宁陕县城采集的香樟种子和引进的7年生香樟大苗,播种或栽植于户县、周至两地,观察生长过程及越冬的表现,分析冻害成因.研究发现,香樟引种到关中地区,在未达到致死低温(-10.0~-14.0℃)情况下,越冬发生冻害的成因是:秋季生长延迟,导致抗寒能力较弱.据此,对引种驯化方法提出建议. 相似文献
8.
9.
香樟因其树干舒展、枝叶茂密、冠大荫浓、树姿雄伟、寿命长、四季常绿及材质好等特点,而被广泛应用,随着全球气候变暖、科技进步和植物栽培技术的提高,香樟的栽植范围得到扩展。本文较系统地从香樟生物学特性、在徐州栽植的可行性、栽植和养护管理的关键环节等方面,阐述香樟在徐州地区的引种。
相似文献
10.
11.
林分改造与森林环境优化 总被引:4,自引:1,他引:3
林分改造就是根据当地的地带性森林植被类型,有目的地选择一些适合当地生长的树种,通过人工手段对现有生态功能经济效益较差的森林进行改造,从而促进森林向地带性森林群落演替或按设计目标形成某种植物群落的一种造林方法.林分改造是对于现有林分的结构和功能的优化.文章从林分改造的原则和方法、树种选择、林分改造对土壤理化性质的影响、林分改造与生态系统服务功能等方面论述了林分改造对森林环境的优化作用及林分改造与林业生态建设的关系,综述了林分改造的相关研究,并对林分改造的技术措施做了较全面的概括. 相似文献
12.
13.
Unsuccessful colonization by indigenous tree species into established plantations has retarded the succession of artificial plantations to more natural, secondary forests in South China. To understand how to improve colonization by seedlings of indigenous species, we determined how performance of indigenous seedlings is affected by seedling species (the shade-intolerant Castanopsis chinensis, the moderately shade-intolerant Michelia chapensis, and the shade-tolerant Psychotria rubra), the site into which the seedlings were transplanted (a mixed-legume plantation, a eucalyptus plantation, a mixed-native plantation, a mixed-conifer plantation, and a shrubland), and site preparation (removal or retention of understory vegetation and litter). Seedling survival and growth were generally increased by removal of understory vegetation and litter. C. chinensis and M. chapensis grew better in the mixed-legume and mixed-conifer plantations, while P. rubra grew better in mixed-native and mixed-conifer plantations. Responses of the transplanted seedlings to environmental factors were species specific. The effects of light on seedling survival and growth were correlated with the shade tolerance of the species. Soil moisture was important; it was positively correlated with survival but negatively correlated with growth of C. chinensis seedlings. Growth of C. chinensis and M. chapensis was positively correlated with soil potassium, while growth of P. rubra was positively correlated with soil organic matter but negatively correlated with soil hydrolyzed nitrogen. These findings suggest that we should select suitable native species under the different plantations before improvement of plantations. Light and soil moisture are most important environmental factors for the selection of species specific. Site preparation and fertilizer are needed during the improvement of those plantations. 相似文献
14.
15.
分析盐碱地对树木的危害,阐述通过物理、水利和化学土壤改良的措施;在造林树种选择中以耐盐能力强、抗旱耐涝能力强、易繁殖、生长快、经济价值高为原则,选择了国槐、剌槐等11种乔木和灌木树种,并提出进行高标准、长周期的后期养护. 相似文献
16.
沙地杨树刺槐人工混交林的改良土壤功能及养分互补关系 总被引:12,自引:1,他引:11
杨树刺槐混交林是我国北方地区沿河及滨海沙地上成功的固氮树种和非固氮树种人工混交林。本文在简单介绍混交林生长情况的基础上,主要对林地土壤养分改良及其种间N、P养分互补关系进行了阐述。指出杨树刺槐混交林生产力提高主要是因为林地土壤养分(特别是N素养分)的极大改善及树种间N、P养分的互补。混交林土壤N素养分水平提高的根本原因是林地土壤微生物活性高,加快了含N较高枯落物分解速度,增强了土壤氨化及硝化强度。而杨树刺槐种间的N、P养分互补则主要表现在混交林中杨树可将吸收入体内的P素通过根系接触转移给相邻的刺槐,而刺槐则可将固定的N素通过根系接触转移给杨树,而且N、P转移的强度很大。这种奇妙的树种间养分互补机制对杨树刺槐混交林幼林期生产力提高是有重大意义的。 相似文献
17.
18.
A. Pérez-Bejarano J. Mataix-Solera R. Zornoza C. Guerrero V. Arcenegui J. Mataix-Beneyto S. Cano-Amat 《European Journal of Forest Research》2010,129(1):15-24
In semiarid ecosystems plant cover plays an important role in the improvement of physical, chemical and biochemical soil properties.
With the aim of studying the influence of different plant species on soil properties, and establishing the relationships between
them, 160 soil samples from under four different plant species (Pinus halepensis, Quercus coccifera, Juniperus oxycedrus and Rosmarinus officinalis) were taken in a forest area of the province of Alicante (SE Spain). The following soil properties were analyzed in all soil
samples: organic carbon content, microbial biomass, soluble organic carbon, aggregate stability, basal respiration, and some
eco-physiological ratios. In addition, the near infrared spectra (NIR) of all soil samples were obtained to verify the similarities
or differences between soil samples under the four species. Some differences in parameters such as organic carbon content
or basal respiration were found mainly between the group of P. halepensis and Q. coccifera with respect to J. oxycedrus and R. officinalis. Despite this, the high organic carbon content found under the four plant species showed an influence on the rest of soil
properties. Moreover, using a discriminant analysis with factorial scores from NIR absorbance data did not result in a good
classification of samples in terms of the species, reflecting some similarities between them. Our results show that the high
contents observed in some parameters under the four species, and the lack of significant differences in most of them, prove
the important role of shrubland in semiarid conditions, it being capable of promoting good soil conditions. 相似文献
19.
11种乡土阔叶树在广州南沙的早期生长表现 总被引:2,自引:0,他引:2
于2008—2011年连续监测了广州南沙黄山鲁森林公园11种乡土阔叶树种的高生长、胸径生长及冠幅生长,及与邻近白楸次生林的根区土肥力比较研究,探讨这些树种的生长特点及改良土壤的潜力。结果表明,千果榄仁和白锥生长不适,死亡率较高,其他树种大都生长良好。其中,楝叶吴茱萸、西南桦、米老排和山杜英等表现出较快的树高、胸径和冠幅生长。与邻近的白楸次生林相比,3年生试验林林木根区土的有机质较低;不同树种的根区土肥力比较结果表明,火力楠和米老排的根区土肥力较高,生长快速的西南桦和楝叶吴茱萸次之,生长缓慢的白锥的根区土肥力较低,反映了不同树种改良土壤的潜力有较大差异。初步研究结果表明,火力楠和米老排等树种有利于土壤肥力的改良,西南桦和楝叶吴茱萸等速生树种有利于快速提高植被的覆盖率。 相似文献