A Study on the Characteristics of Water Consumption by Transpiration of Four Garden Plants in Linzhi City, Tibet

Characteristics of water consumption by transpiration of the four garden plants in the nursery of Agricultural and Animal Husbandry College of Tibet University has been studied using the 2-year-old potted seedlings. The experiment shows that: All of the four plants had a higher water consumption by transpiration in the full light condition than in the full shade condition. The four plants had a basically same process of water consumption in the two conditions: All of them had a lower value in the morning and evening, and a peak during noon 13:00-15:00. In the full light and shade conditions, the water consumption rate of the four plants represented the same sequencing: Sorbaria sorbifolia> Rosa chinensis Jacq.> Syringa oblata Lindl> Ligustrum quihoui Carr.. In the full light condition, all four plants had the maximal water consumption rate in August and minimal water consumption rate in December. Among them, the water consumption rate of Sorbaria sorbifolia in December accounted for 79.26% that of August, and the water consumption rate of Ligustrum quihoui Carr. in December accounted for 84.22% that of August.