Characteristics of Maize Sap Flow in Horqin Sandy Land

TANG Xia; CUI Jian-Yuan; YUE Xiang-Fei; WANG Shao-Kun; YUE Guang-Yang

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Characteristics of Maize Sap Flow in Horqin Sandy Land

- Characteristics of Maize Sap Flow in Horqin Sandy Land
- Bulletin of Soiland Water Conservation Vol. 30, Issue 2, Pages: 31-35(2011)
- 作者机构：
  
  1. 中国科学院寒区旱区环境与工程研究所
  2. 中国科学院研究生院
- 作者简介：
- 基金信息：
- DOI：
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- Published：2011
- 稿件说明：
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TANG Xia, CUI Jian-Yuan, YUE Xiang-Fei, et al. Characteristics of Maize Sap Flow in Horqin Sandy Land[J]. Bulletin of Soiland Water Conservation, 2011, 30(2): 31-35.
DOI：

TANG Xia, CUI Jian-Yuan, YUE Xiang-Fei, et al. Characteristics of Maize Sap Flow in Horqin Sandy Land[J]. Bulletin of Soiland Water Conservation, 2011, 30(2): 31-35. DOI：

摘要

以Dynamax包裹式茎流测量系统对科尔沁沙地玉米的液流变化进行了连续监测

结合实验区自动气象站同步测定的光合有效辐射、气温、相对湿度和风速等气象因子以及人工记录的天气状况

分析了4种典型天气条件下玉米的茎流变化、蒸腾耗水规律及其与气象因子的关系。结果表明

不同天气条件下

玉米液流日变化波动曲线不同

影响液流量的主要气象因子也不同

光合有效辐射始终是液流变化的主导因子。晴天

玉米液流速率的日进程为"几"字型峰或单峰曲线;阴天

玉米的液流曲线通常呈多峰状态;风天和雨天是单峰曲线

或是呈不规则的多峰曲线。玉米茎秆液流通量密度的变化是各种气象因子综合作用的结果。单株日耗水量的总体变化趋势是从晴天、风天、阴天到雨天依次减少

其平均值分别为588

401

399和305g/h。

Abstract

A Dynamax sap flow measuring system consisted of heat balance sensors was used to continuously monitor sap flows of corn(Zea mays) on Horqin sandy land

Northeastern China.The photosynthetic active radiation

air temperature

relative humidity and wind velocity were recorded synchronously by an automatic weather recording system.Based on the manual records of weather conditions

four most representative weather conditions were gathered up to analyze the relationship between sap flow

water consumption and meteorological factors.The results showed that the diurnal variations and affecting factors of sap flows differed with weather conditions.However

the photosynthetically active radiation was always the dominant factor affecting the sap flow.The diurnal sap flow changes of corn showed board peaks or single-peaked curves in sunny days

multiple-peaked curves in cloudy days

and single-peaked or irregular multiple-peaked curves in windy day and rainy day.The diurnal variations of sap flows resulted from comprehensive effects of multiple meteorological factors.The water consumption for an individual corn plant was the highest in sunny days

followed by windy days

cloudy days

and rainy days

with means of 588

401

399

and 305 g/h

respectively.

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