Effects of Different Cultivation Time of Garden Plants on Soil Chemical Properties and Soil Enzyme Activities

Garden soil test was used to study the effects of different cultivation time of garden plants on soil chemical properties and soil enzyme activities in the garden. The results showed that with the extension of cultivation time,the activity of protease,urease and catalase in Ginkgo biloba soil increased significantly,while the activity of protease in other garden plants showed a certain degree of decline,and the activity of urease increased significantly in the soil cultivated Lagerstroemia indica for over 3 years. However,in the soil cultivated the garden plants for less than 3 years,the difference in the activity of urease was relatively small,and the difference in the activity of catalase was relatively significant.

Significance of Implementing ISO9001 and ISO14001 Standards in Tourism Service Enterprises——the Practice at xin Long Tropical Plants Garden

As a China national comprehensive tropical plants garden, the Xin Long Tropical Plants Garden undertakes multiple tasks of scientific research, species protection, popular science education and tourism reception. Same as a global tropical plants garden, it also faces the strategic tasks of reasonable utilization of biological resources & environmental protection, international exchange & international cooperation and upgrading the level of management. How to upgrade the level of services; how to provide the society with high quality tourism services; how to achieve both resources exploitation and environmental protection; how to match with the international practice; how to eliminate technical barrier of trade and ensure fair competition etc; all these are the problems of common concern of both domestic and foreign enterprises of tourism service. The Xin Long Tropical Plants Garden has taken a trial implementation of ISO9001:2000 and ISO14001:1996 dual standard system since 2001 and passed the certification of CQM (China Certification Center for Quality Mark) in 2002 and gained the certificate of IQNet, so set an example in implementing standardized management for both domestic and foreign enterprises of tourism service.

Thoughts about Plant Landscape Forms of Urban Gardens

Landscape presents nature to us in another way through artificial transformation. At the same time of rapid development,cities should attach great importance to setting of urban green landscape. Plant landscape of urban gardens is an essential part of urban green landscape. To study plant landscape of urban gardens,it is necessary to find out growth habits and characteristics of plants,and ornamental benefits of plants. Different plants can be combined together to produce different space forms and generate different aesthetic effects. Through enriching plant landscape forms of urban gardens,it is feasible to increase the interest of urban landscape.

Occurrence and Prevention of Garden Plant Sunscald

To explore the occurrence laws of garden plant sunscald in summer,the authors investigated occurrence of garden plant sunscald systematically in Suzhou classical gardens and some other gardens in the downtown areas and outskirt of the city,classifi ed the severity of sunscald into"severe","moderate"and"slight".The study aims at offering references for garden landscape planning and management departments.

The future of plant conservation and the role of botanic gardens

1.Introduction The papers included in this special issue are mostly based on presentations made at the IABG international conference held at Shanghai Chenshan Botanical Garden.China,November 2016,which addressed the roles that botanic gardens,both in China and elsewhere,can play in national biodiversity conservation stra-

花楸树——城市绿化的新贵

花楸树为蔷薇科苹果亚科花楸属植物,落叶乔木或灌木,高达8m。具有很高的园林观赏价值。花楸树引种驯化成功并应用于城市园林绿化,将为北方城市增添一道亮丽的风景线,对丰富城市绿化树种特别是首都北京的绿化建设具有重要意义。