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课题研究北京常用园林乔木的耗水量和耗水变化规律,以及影响其耗水的主要因素。针对筛选出的5种常用园林乔木进行了试验,利用热扩散式液流探针和小型气象站测定乔木边材茎流速率。不同的灌溉处理显示出了不同的水分需求量。试验结果显示了乔木茎流当日变化的一般规律,以及灌溉量对乔木茎流的影响。湿度、降水量、气温以及风速等气象因素对茎流具有较大的影响。植物病虫害对乔木耗水量也有一定的影响。
The subject researches the law of water consumption and water consumption of common garden trees in Beijing, as well as the main factors that affect their water consumption. Five common garden trees were screened out, and the flow rate of arbor sap flow was determined by using thermal diffusive flow probe and small weather station. Different irrigation treatments show different water requirements. The test results show the general rules of the tree stem flow on the day, and the effect of irrigation on the flow of the tree stem. Meteorological factors such as humidity, precipitation, temperature and wind speed have a great influence on the stem flow. Plant pests and diseases on the tree water consumption also has a certain impact.