江南暖地草坪冬季交播技术的探讨

对江南城市暖地型草坪草冬季交播技术如草种选择、播种量、播种时间、播种前坪床准备、交播后草坪管理及需注意解决的问题等进行了探讨，并对将来发展趋势进行了展望。     

佛山梁园历史文化街区规划设计

突出梁园作为省级文保单位和岭南四大名园之一的著名古典园林地位。依据史料记载,尽可能原地恢复历史景区。对于不属于文物修复范围的其他景区,尽可能适应旅游开放的需要,增加景点容量,以获得良好的社会经济效益。采用传统岭南古典园林设计手法,合理布置水系,园林绿地,园林小品及其他园林建筑。     

在韩国片断化林区内道路对小型啮齿类种群的影响

The road effect on small rodent population is investigated at 8 fragmented forest areas in the Baekdudaegan moun-tain range, South Korea in September 2001, We especially focused on the distribution and body condition of small rodents near the roads, Korean field mouse (Apodemus peninsulae) seems to be more sensitive to the existence of a road than striped field mouse (Apodemus agradus), Korean field mouse prefers interior forest area to around road. Striped field mouse is a habitat generalist and has wide distributional range around road, but Korean field mouse is forest-inhabiting species and their distribu-tion is limited in forest area. These results suggest the effect of road is different on each small rodent species and their habitat preferences.     

三种薇菜产品营养成分的分析与比较

以南薇菜干、北薇菜干、水煮薇菜为原料,对它们的水分、灰分、粗蛋白、粗纤维、粗脂肪、胡萝卜素、Vc、K、Na、Ca、Mg、Fe、Cu、Se等营养成分进行了分析。结果表明:水煮薇菜含水量最高达到85.7%,两种薇菜干的水分含量差异不显著,但与水煮薇菜水分含量有极显著差异。南北薇菜干灰分和K含量差异显著,水煮薇菜含量最低与两种菜干均有极显著差异;水煮薇菜的粗脂肪和胡萝卜素含量最低与南薇菜干都有极显著差异,南北薇菜干间只有粗脂肪含量差异显著。三种菜样间Ca含量都有极显著差异,但Fe含量差异都不显著。粗蛋白、粗纤维、Vc、Na、Mg、Se、Cu南北薇菜干间无显著差异,水煮薇菜含量最低与两种菜干都有极显著差异。     

The potential of alley farming in humid West Africa — a re-evaluation

Previously published hypothesis concerning the potential impact of alley farming on maize yields are re-examined relative to the humid regions of West Africa. When more realistic assumptions regarding the availability of organic nitrogen are used, it is concluded that alley farming may have potential in a wider range of maize yield environments in West Africa than previously proposed. A pragmatic approach to alley farming research is proposed, and the importance of on-farm research in the development of ‘farmer friendly’ alley farming is stressed. (Former Agronomist, International Livestock Centre for Africa, P.M.B. 5320, Ibadan, Nigeria)     

滇南雨林山区林业持续发展问题探索

从滇南雨林山区的自然与社会经济特点出发，确认林业在区域经济发展中占重要地位，进而对林业持续发展中的自然生态系统脆弱、农林争地、人工林土壤退化、生物物种减少、林业经济效益低等问题进行了分析，提出发展高效林业，建设珍贵用材林、特产经济林、雨林特产品、热带水果生产基地，以及大力营建混交林、农用林业的对策与措施。建议立即开展生物资源本底调查，珍稀濒危生物物种保护，乡土树种栽培驯化、雨林特产品研究等工作。     

The tree tenure factor in agroforestry with particular reference to Africa

Rights over trees are often distinct from rights over land. Tree tenure consists of a bundle of rights over trees and their produce which may be held by different people at different times. These rights include the right to own or inherit trees, the right to plant trees, the right to use trees and tree products, the right to dispose of trees and the right to exclude others from the use of trees and tree products. Factors affecting who had rights include the nature of the tree, the nature of the use and the nature of the person or group. Landowners and tree plants tend to be relatively advantaged in terms of their rights to trees. Those with temporary claims to the land and, in some case, women, tend to be disadvantaged. The implications of tree tenure issues for the design of agroforestry projects are discussed.

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Resumen Los derechos sobre los arboles muchas veces son distintos a los derechos sobre la tierra. La propiedad del arbol consiste en un lote o derechos sobre arboles y sus productos que pueden ser mantenidos por distintas personas en distintos tiempos. Estos derechos incluyen el derecho a poseer o heredar arboles, el derecho a plantar arboles, el derecho a usar arboles y los productos arboreos, el derecho a disponer de los arboles y el derecho a excluir a otros del uso de los arboles y los productos arboreos. Se incluyen en los factores que afectan quienes tienen determinados derechos la naturaleza de los arboles, la naturaleza de su uso y la naturaleza dela persona o grupo. Terratenientes y plantadores de arboles tienden a tener ventajas en terminos de sus derechos sobre los arboles. Aquellos con derechos temporales y en algunos casos las mujeres tienden a estar en desventaja. Aqui se discute la problematica de las implicancias de la tenencia de los arboles para el diseno de proyectos silvo-agropecuarios.

     

南洞庭湖湿地生态系统结构、功能与可持续研究

洞庭湖是我国著名的淡水湖泊湿地，也是世界上唯一的由3个国际重要湿地组成的湖泊。文章分析了南洞庭湖湿地的形成原因及演替规律，研究了其生态系统结构特征，评价了动物栖息地、植物基因库、生态改善、湿地生产、科教基地、旅游度假等湿地功能，指出其面临的主要问题是湖泊面积缩小、湿地功能衰退、动物种群衰减、资源利用率低、环境污染加剧，提出扩大湖泊面积、重视湿地资源保护、加强自然保护区建设、发展湿地生态农业、加快湿地污染治理的南洞庭湖湿地生态系统可持续发展途径。     

A Biophysical and Economic Assessment of a Community‐based Rehabilitated Gully in the Ethiopian Highlands

Gully erosion reduces agricultural productivity by destroying valuable land resources, increases sediment concentrations, reduces water quality, and fills up reservoirs. Gully rehabilitation has proven to be challenging especially in the high‐rainfall areas of the Ethiopian Highlands and has therefore had limited success. This paper describes a successful low‐cost gully rehabilitation effort with community participation in the Birr watershed in the Blue Nile basin that begun in early 2013. Initially, farmers were reluctant to participate for religious reasons, but with the aid of local priests and respected elders, community discussions, and a visit to a rehabilitated gully, a consensus was reached to rehabilitate a 0·71‐ha upland gully. The rehabilitation measures consisted of regrading the gully head at a 45° slope, constructing low‐cost check dams from locally available materials, and planting Pennisetum purpureum grass and Sesbania sesban. At the end of the first post‐implementation rainy season, 2,200 tons of soil was conserved by the constructed check dams and newly planted vegetation, compared with soil losses of 680 and 560 tons in two untreated, nearby gullies. In 2014, an additional 3,100 tons of soil was conserved. In 2013, the marginal rate of return (MRR) on the gully rehabilitation investment was 2·6 based on the value of increased forage production alone. When we include trapped soil nutrient values, the rehabilitation MRR was increased to 10. Although these numbers are impressive, the best proof of the success was that farmers on their own initiative rehabilitated an additional five gullies in 2014. Copyright © 2015 John Wiley & Sons, Ltd.     

华南蕨类植物区系新资料

报道了产自赣州市的2种江西省新记录蕨类植物:西南凤尾蕨(Pteris wallichiana J.Agardh)、岭南凤尾蕨(Pteris maclurioides Ching);广东省首次详实记录的蕨类植物:台湾毛蕨(Cyclosorus taiwanensis(C.Christensen)H.It)。标本存放于韩山师范学院生物系植物标本室(CZH)。