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不同供水条件下侧柏和刺槐幼树蒸腾耗水及其校正函数

[Transpiration water consumption of young Platycladus orientalis and Robinia pseudoacacia trees and their correction functions under different water supply].

作者信息

Wang Jinxin, Huang Baolong, Wang Mingchun, Wang Dihai

机构信息

Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China.

出版信息

Ying Yong Sheng Tai Xue Bao. 2005 Mar;16(3):419-25.

Abstract

Through artificial water control in the shed of rain-free, this paper studied the physiological water requirement patterns of 2-3 years old Platycladus orientalis and Robinia pseudoacacia trees during their growth period, and the relationships between their transpiration water consumption and soil water supply. The results showed that the transpiration water consumption of Robinia pseudoacacia was increased with increasing soil water supply within the range of 40%-100% of field water-holding capacity. Its maximum transpiration water consumption was at the early and accelerating growth stages, accounted for 80.5% of total annual water consumption. The transpiration water consumption of Robinia pseudoacacia was 5.13 times as much as that of Platycladus orientalis. Platycladus orientalis had a peak value of transpiration water consumption when the soil moisture content was 40%-100% of field water-holding capacity. Its transpiration water consumption was the maximum at accelerating growth stage, accounted for 46.27% of total annual water consumption, next at later growth stage, and relatively small at early growth stage. The correction functions of transpiration water consumption to soil water supply and the time-soil moisture functions of practical transpiration water consumption under insufficient water supply for two test species were put forward for the first time.

摘要

通过在无雨棚内进行人工水分控制,研究了2 - 3年生侧柏和刺槐在生长期间的生理需水规律,以及它们蒸腾耗水量与土壤水分供应之间的关系。结果表明,在田间持水量的40% - 100%范围内,刺槐的蒸腾耗水量随土壤水分供应的增加而增加。其最大蒸腾耗水量出现在生长初期和生长加速阶段,占全年总耗水量的80.5%。刺槐的蒸腾耗水量是侧柏的5.13倍。当土壤含水量为田间持水量的40% - 100%时,侧柏的蒸腾耗水量出现峰值。其蒸腾耗水量在生长加速阶段最大,占全年总耗水量的46.27%,其次是生长后期,生长初期相对较小。首次提出了两个试验树种蒸腾耗水量对土壤水分供应的校正函数以及水分供应不足时实际蒸腾耗水量的时间 - 土壤水分函数。

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