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本文应用蒸腾观测场法对花棒、毛条、沙拐枣、梭梭、沙枣的一年生实生苗;二白杨、新疆杨、沙木蓼一年生扦插苗进行了蒸腾耗水量的研究。各树种单株年耗水量比较,二年生植株以新疆杨最大(220.9公斤),其后是沙枣(207.8公斤)、二白杨(172.8公斤)、沙木蓼(139.7公斤)、沙拐枣、梭梭、花棒、毛条。一个生长季内沙枣、沙木蓼蒸腾峰值在9月,花棒、毛条的蒸腾最大值在7月,而梭梭和沙拐枣的峰值出现在8月。三年生植株蒸腾量远大于二年生植株,并且三年生植株蒸腾强度月变化以5月(沙枣)或6月(沙木蓼)最大,比二年生植株的蒸腾高峰提前1或2个月。
In this paper, the transpiration observation field method was used to study the annual water-saving of annual cuttings of Populus tomentosa, Tops, Caragana angustifolia, Haloxylon ammodendron and Elaeagnus angustifolia. The annual water consumption per plant of each species was compared with that of the biennial plant, which was the largest in Xinjiang (220.9 kg), followed by jujube (207.8 kg), poplar (172.8 kg), Polygonum viviparum (139.7 kg) Shuttle, Hualian, tops. In one growth season, the highest transpiration rate of stems and leaves of Polygonum amygdaloidum in September was in September, the maximum of transpiration in flower stems and tops was in July, and the peak of Haloxylon ammodendron and Calligonum in August. The transpiration of three-year-old plants was much larger than that of biennial plants, and the monthly variation of transpiration of three-year-old plants was the highest in May (jujube or June) (Polygonum molitor L.), one or two months earlier than that of biennial plants.