Can we really understand our grasslands with short‐term experiments ?

摘要：

Grasslands are complex ecosystems comprising natural,exotic and imposed elements over many scales.The behaviour of these components can appear chaotic but when investigated in detail,a deeper order often emerges with time along with a clearer understanding of the mechanisms driving production and ecosystem outcomes e.g.the Park Grass Experiment at Rothamsted.Too often interpretations from grassland studies are based on guessing likely longer‐term trends derived from only a few years of observation as funders are reluctant to make long‐term commitments.This often leads to erroneous conclusions because the behavior of the system has not had time to express itself.Grasslands research,of necessity large scale and expensive in terms of land,labour and capital,is faced with a dilemma.Yet the longer better designed and resourced experiments are monitored the greater the return in information gained.

关键词： grazing research grazing systems long‐term experiments

作者: V.Allen D.Kemp D.Michalk

作者单位: Department of Plant and Soil Science,Texas Tech University,Lubbock,TX,79409-2122,USA School of Agriculture and W ine Science,Charles Sturt University,Orange,NSW,Australia 2800 Orange Agricultural Institute,NSW Department of Primary Industries,Orange,NSW Australia 2800

会议类型: 国际会议

会议名称: 2008世界草地与草原大会

会议地点: 呼和浩特

会议语种:英文

在线出版日期: 2008-06-29（万方平台首次上网日期，不代表论文的发表时间）