安源林地资源管理现状及发展对策

分析了安源林地资源概况及开发利用现状,针对当前安源林地保护管理中存在的问题及原因,提出了林地资源保护管理工作的发展对策。     

吉祥草的耐阴性试验及在常德地区应用建议

吉祥草是一种优良的地被植物，在常德地区被大量应用，但在很多地方均生长不良，据分析与光照强度有关。选择800盆吉祥草进行遮荫试验，进行常规的养护管理，观察记录吉祥草的生长状况并做比较分析，连续进行2年试验。结果表明，吉祥草在透光率20％-30％状态下生长良好，园林绿化中可应用在疏林底下，或与其他耐阴地被植物和山石搭配为最佳。     

宁夏隆德县林地补充问题探讨

在总结宁夏回族自治区隆德县林地补充现状以及林地补充存在问题的基础上,客观分析了林地补充的必要性和可行性,预测了林地补充的主要途径、区域,并提出了林地补充的保障措施。     

论广州市城市林区建设

以广州市政府提出的建设具有广州特色的"林带+林区+园林"城市森林新模式的总体思路为指导,结合广州城市森林现状,提出了广州市城市林区建设的指导思想和基本原则,把广州市城市林区建设划分为城市生态景观林区、水源涵养林区、商品林区,并阐述了城市林区的建设重点。     

Effects of fallen snow on the voluntary intake and grazing behavior of Hokkaido native horses in winter woodland with underlying Sasa senanensis

The intake, digestibility, and grazing behavior of Hokkaido native horses were investigated in winter woodland with underlying Sasa senanensis. Twenty Hokkaido native horses were grazed in a woodland (8.52 ha) for 14 days in December (snowy; 20 cm of snow fall) and in November (non‐snowy) of the next year. Three mares (360 kg of average bodyweight) were used in each experiment. The fecal collection, used to investigate the intake and digestibility by the double‐indicator method, and behavioral observations were carried out for 24 h on the 6th day in each experiment. During the snowy and non‐snowy periods, the dry matter intakes of sasa foliage were 7.3 and 9.6 kg/d, respectively, which is 2.1 and 2.7% when expressed as a percentage of bodyweight. The apparent digestibility of nutrients and energy released during the snowy and non‐snowy periods were similar. The proportions of digestible energy intakes to maintenance requirement in the mares were 119 and 164% during the snowy and non‐snowy periods, respectively. Their bodyweight remained constant during the non‐snowy period; however, a slight loss in their bodyweight was observed during the snowy period. The duration of grazing on sasa foliage was 416 and 544 min/d during the snowy and non‐snowy periods, respectively, the daily grazing area of the mares during these periods was 2.0 and 5.1 ha, respectively. In other words, the area during the snowy period was smaller than that during the non‐snowy period (P < 0.05). Fallen snow, even with a depth of approximately 20 cm, inhibited the grazing behavior and intake of sasa foliage by Hokkaido native horses grazing in winter woodland pasture.     

生态垫对造林地土壤水分及养分的影响研究

通过对在树苗基部覆盖生态垫与未覆盖生态垫的土壤进行比较,研究生态垫对北京市通州区造林地土壤水分、土壤养分的影响。结果表明:(1)铺设生态垫后,在0～20cm、20～40cm土层全年土壤含水量分别平均提高了25.3%、15.1%。一年四个季节中,0～20cm层土壤水分含量为28.1%(冬季)>25.1%(夏季)>13.9%(春季)>12.1%(秋季),20～40cm层土壤含水量为32.1%(冬季)>30.5%(夏季)>19.9%(秋季)>17.6%(春季)。尤其在冬季和春季,生态垫对土壤水分含量影响显著;(2)铺设生态垫后,土壤有机质含量有增加的趋势,土壤全氮和速效磷含量有减少趋势,但差异不显著。生态垫对土壤速效钾含量影响显著,在四个季节都有提高。     

Designing mimics from incomplete data sets: salmon gum woodland and heathland ecosystems in South West Australia

In this article we assess the potential for developing mimics in situations where detailed data on the ecophysiology and ecosystem function of the native ecosystem are not available. We examine two ecosystems in south western Australia, and draw together available information on these. We discuss woodlands dominated by Eucalyptus salmonophloia, which formerly covered much of the valley bottom land in the Western Australian wheatbelt, and kwongan or heath which occurs on sandplain soils at the top of the landscape. From both of these we derive possible mimics which utilise aspects of the native vegetation which we hypothesise contributed to ecosystem function and resilience, but which still allow the production of a harvestable agricultural product. We conclude that situations for which we have adequate ecological knowledge from which to develop sound mimics are likely to be rare. We hence have to be prepared to make best-bet estimates and use these to develop experimental mimic systems. This revised version was published online in June 2006 with corrections to the Cover Date.     

广东省林地土壤非毛管孔隙度分布规律初探

以2002年全省林地土壤调查样本中的土壤非毛管孔隙度资料为研究对象,讨论了不同的纬度、母岩、海拔、树种、坡度、坡向、坡位和土层厚度等对土壤非毛管孔隙度的影响。结果表明:不同的纬度、母岩、海拔、树种、坡度的土壤非毛管孔隙度分布有明显规律性,而坡向、坡位和土层厚度等对土壤非毛管孔隙度的分布影响不大。     

南方集体林地产权制度的历史变迁

根据制度变迁理论,分5个阶段对新中国成立以来南方集体林地产权制度的历史变迁进行了分析,阐明了各个阶段产权制度的安排特点及产生的绩效和缺点,并总结了经验与启示.     

生态公益林地籍信息系统的应用及完善——以浙江省衢州市为例

从生态公益林地籍信息系统在推广过程中的应用效果、存在问题及林业科学管理的需求出发,分析了该系统的系统结构、应用现状及功能优劣,并提出了进一步完善现行系统的初步建议。