首页|The principles and guidelines for designing long-term agronomic experiments

The principles and guidelines for designing long-term agronomic experiments

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Many of the important questions facing farming systems in the world today require long-term studies to provide meaningful information and answers.A long-term agronomic experiment (LTAE) should (1) have long-term objectives;(2) study important soil processes or ecological processes;and (3) be related to the productivity and sustainability of systems.A well established LTAE can provide both insights into how the system operates and foresight into where the system goes.The prerequisites for setting up a LTAE are the secured land,continuous funding and dedicated scientists.A number of principles must be considered carefully when establishing a LTAE,(1) the site must be representative of large areas;(2) the treatments should be simple,but focusing on the big questions;(3) the plots should be large enough to allow subsequent modification of the experiment if this becomes necessary;(4) crop rotations should minimise,wherever possible,the risk of build-up of pests and diseases,and rotational phase should be considered in a rotational experiment;(5) a clearly defined experimental protocol should be developed to ensure data collected is scientifically valid and statistically analysable,but with flexibility to allow essential changes;(6) soil samples,possibly plant samples,should be achieved to provide better answer to the original questions when new,perhaps more accurate analytical techniques are developed,or answer new research questions that were not considered in the original design.The MASTER experiment in Australia was used as a case study to demonstrate how these principles are implemented in practice.

long-term experimentsustainabilitycrop rotationsoil processing

GuangDi Li、FengRui Li、Mark Conyers

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E H Graham Centre for Agricultural Innovation (Alliance between NSW Department of Primary Industries and Charles Sturt University),Wagga Wagga Agricultural Institute,PMB,Wagga Wagga,NSW 2650,Australia

Linze Inland River Basin Research Station,Cold and Arid Regions Environmental and Engineering Research Institute,the Chinese Academy of Sciences,320 Donggang West Road,Lanzhou Gansu 730000,China.

E H Graham Centre for Agricultural Innovation (Alliance between NSW Department of Primary Industries and Charles Sturt University),Wagga Wagga Agricultural Institute,PMB,Wagga Wagga,NSW 2650,Australia.

CAS/SAFEA International Partnership Program for Creative Research Teams

CXTD-Z2005-2-4

2009

寒旱区科学(英文版)
中国科学院寒区旱区环境与工程研究所,科学出版社有限责任公司

寒旱区科学(英文版)

影响因子：0.237
ISSN：1674-3822
年,卷(期)：2009.1(1)
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