摘要
介绍了根系观测中的主要方法,侧重介绍目前作物根系研究中较为常用的观测方法——微根管法(Minirhi-zotron),讨论和分析了根系观测方法的优缺点。指出从气象预报业务需要的角度出发,根系观测有助于订正陆面模式中地下基本参数获取不准确给模拟结果带来的误差,提高区域小气候预测的准确率,更加深入地研究地气相互作用,掌握天气变化规律。通过对国内外一些根系研究情况的回顾与分析,指出科研人员在野外试验中选择具体方法时应基于特定的研究目的或者特定的科学条件,需要对各种方法的适用条件有所了解,并在这些条件下进行分析比较,选取适宜的观测方法。最优的根系研究方法要根据研究目的和研究条件来确定,对于具体的研究,往往需要采用不只一种方法。
A review is made of the main methods for observing root systems, with emphasis on the minirhizotron method used widely, and the relative merits are discussed. It is pointed out that from the needs of weather forecasting, root system observation can be used to correct the errors in land surface models resulted from the lack of the essential parameters of land processes, to improve the accuracy of regional microclimate prediction, study air-ground interaction, and grasp the regularity of weather variation. The research achievements at home and abroad are reviewed, and it is pointed that while selecting observation methods, the purposes and scope of a study should be considered fully, and any method has its own limitations. Before making a decision, it is necessary to understand the applicable conditions of a method, and made comparison carefully. Maybe the optimum solution is to use more than one methods.
出处
《气象科技》
2008年第4期429-435,共7页
Meteorological Science and Technology
基金
国家科技部"大型科学仪器协作共用及升级改造"项目和"大型植物根剖面观测系统改造升级"项目联合资助
关键词
根系
观测方法
微根管
root system, observation methods, minirhizotron
