编者按：

(Written by Ming-Han Li)

生活中充满了意外，介绍近年流行的“景观绩效”的本期专题也不例外。撰写这篇编者按让我回想起去年林广思博士出席2014年风景园林教育委员会（CELA）在巴尔地摩年会的情景。当时我身任CELA科研副主席（VPR），负责摘要审查工作。在我副主席任内，推动景观绩效成为CELA标准议题之一，并在该年会首次介绍给与会者。后来我才知道，林博士当时对于景观绩效的课题深感兴趣，听了多场演讲，随而兴起筹划专题的想法，期待《风景园林》景观绩效专题由于其前瞻性和对于学科与专业在中国的潜在影响将吸引中国读者予以关注。

承蒙林博士的邀请让我有此机会组织论文以反映目前美国景观绩效的研究概貌和进展，并邀请在景观绩效科研已经有显著贡献与成果的作者撰文。我初始的想法包含景观绩效系列（LPS）概述和在景观绩效理论框架下3个主要效益的量化，即环境、 经济和社会效益。在阅读过作者群的论文之后，当初的想法已然被大幅超越和提升。在此值得为读者介绍专题特刊的作者阵容如下（以英文姓氏排序）。

芭芭拉·多伊奇是风景园林基金会（LAF）的执行总监，她也是景观绩效系列专题的主要推行者。

克里斯托弗·D·埃利斯是马里兰大学的副教授、风景园林教育委员会景观绩效主题的共同负责人之一，他也是2011年风景园林基金会（LAF）CSI 项目的研究学者。

李明翰（撰文者）是德克萨斯州农工大学的教授、2012年-2014年风景园林教育委员会科研副主席，同时他也是2012年风景园林基金会（LAF）CSI 项目的研究学者。

罗毅是德克萨斯州科技大学助理教授。她也是2012年风景园林基金会（LAF）CSI 项目的研究助理。

福斯特·恩杜比斯是德克萨斯州农工大学的风景园林与城市规划系的教授兼系主任。他主持了风景园林基金会的研究委员会，该委员会正是景观绩效系列专题的发起者。

塔纳尔·奥兹迪尔是德州大学阿灵顿分校的副教授，他也是2013年风景园林基金会CSI项目的研究学者。

希瑟·惠伊洛是风景园林基金会案例分析调查（CSI）项目的经理。

杨波是犹他州立大学风景园林与环境规划学系助理教授。他也是2011年-2013年风景园林基金会CSI项目的研究学者。

数据由SPSS20.0统计软件分析，计量资料用（±s）表示，用t检验，计数资料用率（n）表示，P＜0.05代表差异具有统计学意义。

除此之外，同济大学戴代新副教授和我之前共同提交的《美国景观绩效评价研究进展》论文亦在主编的精心安排下收录于此专题。

景观绩效的研究尚在起步阶段。尽管该绩效的研究已经在2010年开始，但对量化各个效益的经验和方法仍是很有限的。风景园林学科和专业应继续坚持循证设计方法，景观绩效研究有希望带领我们朝这个方向迈进，欢迎您加入一起探索。（李明翰/文）

Life is full of unexpected. The formation of this special issue on the recent popular landscape performance topic is such example. Writing this editorial brings me back to recall the occasion when Dr. Guangsi Lin attended the 2014 Council of Educators in Landscape Architecture (CELA)annual conference in Baltimore. I was the CELA Vice President for Research (VPR) in charge of the abstract review process for the conference. Under my tenure as VPR, “landscape performance”became one of the CELA standard tracks and was introduced the first time at a CELA annual conference. As there were several presentations in the landscape performance track at that conference,Dr. Lin, later I knew, was drawn to sit in several of them and decided that a special issue on landscape performance in the near future issue of “Landscape Architecture” will be appealing to China readers because of its forward-thinking and potential impact on the discipline and profession in China.I was honored to be asked by Dr. Lin to layout the composition of the topics reflecting current status in the US and invite authors who have had signifi cant involvements in landscape performance research. My idea of this special issue was to provide an overview of the Landscape Performance Series and encompass the quantifi cation of all three benefi t aspects under the theoretical framework of landscape performance, including environmental,economic and social. Now reading the published articles, my original idea was surpassed and elevated by the rich and innovative studies contributed by the suite of authors who are worth of mentioning.

Elen Deming is professor at University of Illinois, Urbana-Champaign. She was a renowned editor ofLandscape Journal.

Barbara Deutsch is the Executive Director of Landscape Architecture Foundation (LAF), the major driver of Landscape Performance Series.

Christopher Ellis is associate professor at Maryland University and track co-chair of landscape performance for the Council of Educators in Landscape Architecture. He was a research fellow in 2011 CSI Program by LAF.

Ming-Han Li (myself) is professor at Texas A & M University. He was VPR of CELA from 2012-14 and a research fellow in 2012 CSI Program by LAF.

Yi Luo is assistant professor at Texas Tech University. She was a research assistant in 2012 CSI Program by LAF.

Forster Ndubisi is professor and head of landscape architecture and urban planning department at Texas A & M University who chairs the LAF’s research committee that initiated the Landscape Performance Series.

TanerOzdil is associate professor at University of Texas at Arlington. He was a research fellow in 2013 CSI Program by LAF.

Heather Whitlow is the manager of Case Study Investigation (CSI) Program at LAF.

Bo Yang is assistant professor at Utah State University. He was a research fellow in 2011, 2012 and 2013 CSI Programs by LAF.

Besides, Dr. Daixin Dai, associate professor of Tongji University, China and I submitted a manuscript entitled “Research Development of Landscape Performance Assessment in America.”This paper is included in this special issue as well.

Landscape performance research is still new.Although such research has been initiated since 2010, the experience and method in quantifying performance in the environmental, economic and social aspects are limited. The landscape architecture discipline and profession should continue the path of evidence-based design approach. The direction of what landscape performance research can lead us to appears to be a promising one. I welcome you to join the adventure.