从广东、广西引进国内近年选育的18个荔枝新品种,在广西灵山县“灵山香荔”大树上高接换种进行集中引种对比试验.参照《荔枝种质资源描述规范和数据标准》制订果实性状评价标准,依据果皮颜色等10个果实性状的重要程度分别赋予不同分值,总分100分.于2018-2020年连续3年分别对引进品种果实性状测评评分,按3年平均得分对果实综合性状进行排名筛选.结果 表明,糯桂、仙进奉、红绣球、红珍珠排在前四位,在当地荔枝主产区品种结构调整可以优先考虑选用.有些品种虽然综合评分不高,但是具有某个特异性状或某些特殊优良性状,如马贵荔单果质量最大,是平均值的166％,穗大、特迟熟,果肉内膜褐色少;范焦1号、井岗红糯、岭丰糯和凤山红灯笼的焦核率均为90％以上且稳定,这些性状在种质资源创新及育种利用中很有价值.

In this study, the data of detailed land survey and statistical yearbook of Nandan County as the studied area were used as data source to ascertain the major driving factor affecting land use in the county with principle component analysis and to analyze the other driving factors therein with quantitative analysis and qualitative analysis. The results indicated that(1) its forest land, garden land and traffic land were significantly increased with grassland and unused land relatively decreasing from 1991 to 2009;(2) there were very great differences of land use degree change among its different towns at different levels of economy development; and(3) at present, the major driving factors affecting land use were population growth, economic development and industrial structure readjustment in the county. It has been necessary to further explore the land use pattern of sustainable development to ultimately achieve a win-win regional sustainable development of social economy and ecological environment in the future.

The influence of land use change on ecosystem research is currently one of the hot topics in the study of sustainable development and ecology. Based on land use planning data,change data and the second data of Guiping City during 1996- 2008,the characteristics of regional land use change were analyzed,combined with ecosystem service function and the change in different time dimensions,the effects of land use change in Guiping City on ecosystem service function were explored. The results showed that in Guiping City during 1996- 2008,the most obvious change of land use structure is garden plot,followed by grassland. The total value of ecosystem services increased by about90 430 500 yuan,and the total value of forest ecosystem services was the largest,and the value of each individual service was also obvious.

针对我国南方旅游景区植物造景存在的问题,提出了应用科学发展观理论、节约型园林理论、生态经济理论、景观生态学理论,适地适树理论、生态位理论、美学理论、植物群落顶极理论等理论来指导旅游景区植物造景,因地制宜,精心设计,营造出高水平、高档次、高效益的旅游景观等对策,指明了我国南方旅游景区植物造景的发展方向.

Based on MAPGIS software,the suitability for reclamation of temporary-using land of freeway was evaluated.The information inquiring was realized through spatial summation analysis,buffer zone analysis and establishing attribute database.This supplied scientific basis for reasonable reclamation and available utilization of land resources.

There is a large lake and original primitive mountain in Tianchi Hill in Nanning of Guangxi Province,its design and planning are according to the original topography,and the landscape design is harmonized with natural eco-environment.There are five greening landscape groups equipped with stilt floor greenbelt,garden greenbelt,offshore water greenbelt,and water system,which enable the general planning to embody the characteristics of restoration nature,unanimity of heaven and men,fusion of modern and classical.

Land reclamation is an important part of the land development and consolidation,and is an important way to implement the total arable land of China at present.Based on MAPGIS software,the reclamation lands of the temporary in the expressway are evaluated.Through the spatial overlay and buffer space analyzing,and the attribute database for the information query are established,so as to provide the scientific basis for reasonable reclamation and the effective utilization land resources,and avoide blindness and destructive,strengthen the scientific and reality,the limited land of resources achieve sustainable utilization,and keep the coordination development for the expressway construction,sustainable utilization and the ecological environment.

There existed a large area of lakes and original ecological mountain in "Tianchi Hill" in Nanning of Guangxi Province due to geographic advantage. Its design and planning should be in accordance with original topography, and landscape design was in harmonious integration with original ecological environment. There were five greening landscape groups in the residential area, which were equipped with stilt space greenbelt, garden feature greenbelt, water-front greenbelt and waterscape system, lending the whole planning the characteristics of "restoration of nature, unity of heaven and human, integration of modernity and classics".