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不同时间尺度下黄土塬区 19 年生苹果树干液流速率 与环境因子的关系
张 静1; 王 力1; 韩 雪1; 张林森2
Source Publication中国农业科学

以黄土高原沟壑区的典型代表长武塬为研究区,通过环境因子估算 19 年生苹果树耗水速
措施、增强其生产能力提供理论依据。【方法】选取黄土塬区长武县 19 年生苹果林生态系统为研究对象,应
用热扩散式茎流计(TDP)于 2014 年 5—9 月对苹果林内 8 株标准果树树干液流速率进行连续测定,并通过数
据采集器 CR1000(Campbell Scientific,UN)对数据进行采集分析,用位于距样地 50 m 处的自动气象观测
站连续监测获取气象数据;分析不同时间尺度下 19 年生苹果树干液流速率与环境因子的关系,建立不同时间
归方程为:v=-11.683+2.3VPD+0.009Rs+0.55Ts+0.880Ws,相关系数为 0.779。日尺度下,只有地表温度、水
汽压差与苹果树干液流速率显著相关。逐步回归方程为:v=1.637+0.404Ts-3.097VPD,相关系数为 0.771。
月尺度下,19 年生苹果树干液流速率整体表现为 8 月>7 月>6 月>9 月>5 月,进入逐步回归方程的仅有地
表温度,逐步回归方程为:v=-3.524+0.509Ts,相关系数为 0.981。时间尺度越大,与苹果树干液流速率相
树干液流速率极显著负相关;太阳辐射在 3 种尺度下与树干液流速率的相关关系不明确。3 种尺度下的逐步

Other Abstract

The Changwu Tableland was taken as a study area in consideration of its typical representative of the
Loess Plateau. The purposes of the study were to estimate water consumption rate of 19 a apple trees at different time scales by
environmental factors, and provide a theoretical basis for the scientific distribution, sustainable management and production capacity
of apple trees. 【Method】Thermal dissipation probe (TDP) was used to measure sap flow velocity of 8 standard 19 a apple trees on
the Changwu Tableland located on the Loess Plateau from May to September, 2014, the data collector CR1000 (Campbell Scientific,
UN) was used to collect and analyze the data, and the meteorological data were monitored continuously by automatic weather station
50 m away from the plot. The characteristics of sap flow were analyzed, and the relationship model between the rate of sap flow rate
and environmental factors at different time scales was established.【Result】 The most close correlations between the sap flow
velocity of the 19 a apple tree and various environmental factors at the hour scale was vapor pressure difference (VPD). Radiation
(Rs), wind velocity (Ws) and soil temperature (Ts) also showed significant correlations with the sap flow. The sap flow curve had a
single peak. The empirical model for the hour scale was: v=-11.683+2.3VPD+0.009Rs+0.55Ts+0.880Ws . At the day scale, Ts and
VPD were significantly correlated with the sap flow velocity. The empirical model for the day scale was: v=1.637+0.404Ts-
3.097VPD. The sap flow velocity showed an order of August>July>June>September>May. Only Ts showed a correlation with
the sap flow velocity. The empirical model for the month scale was: v=-3.524+0.509Ts. With the increasing time scales, the number
of environmental factors associated with the sap flow velocity was gradually reduced, but Ts was the dominant factor at every scale
and the correlation coefficients were gradually increased. Wind velocity (Ws) showed a significant correlation at the hour scale. VPD
had a significantly positive correlation with the sap flow velocity at the hour scale and a significant and negative correlation at the
day scale. The correlation between the Rs and sap flow velocity at the three time scales was not found. For the three stepwise
regression equations, the correlation coefficient for the month scale was the largest. 【Conclusion】 At the larger time scale, the
consumption of water can be estimated by monitoring a small number of environmental factors, but at the smaller time scales, most
of the environmental factors will influence the sap flow. Therefore, estimates of the consumption by the environmental factors cannot
be achieved with a great accuracy, and the method of TDP needs to be used to monitor the consumption.

Keyword苹果 热扩散探针法 液流速率 时间尺度 环境因子
Indexed By中文核心期刊要目总览
Document Type期刊论文
Affiliation1.西北农林科技大学资源环境学院/黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌 712100
2.西北农林科技大学园艺学院, 陕西杨凌 712100
Recommended Citation
GB/T 7714
张 静,王 力,韩 雪,等. 不同时间尺度下黄土塬区 19 年生苹果树干液流速率 与环境因子的关系[J]. 中国农业科学,2016,49(13):2583-2592.
APA 张 静,王 力,韩 雪,&张林森.(2016).不同时间尺度下黄土塬区 19 年生苹果树干液流速率 与环境因子的关系.中国农业科学,49(13),2583-2592.
MLA 张 静,et al."不同时间尺度下黄土塬区 19 年生苹果树干液流速率 与环境因子的关系".中国农业科学 49.13(2016):2583-2592.
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