乌兰布和沙漠中国沙棘果实成熟期茎干液流规律及其与环境因子的关系

生态学杂志

乌兰布和沙漠中国沙棘果实成熟期茎干液流规律及其与环境因子的关系

黄雅茹^1,2,辛智鸣^1,2,罗红梅¹,罗凤敏^1,2,马迎宾^1,2,葛根巴图^1,2,李新乐^1,2,孙非¹,郝玉光^1,2**

（¹中国林业科学研究院沙漠林业实验中心，内蒙古磴口 015200； ²国家林业局内蒙古磴口荒漠生态系统定位研究站，内蒙古磴口 015200）

出版日期:2015-11-10 发布日期:2015-11-10

Stem sap flow dynamics of Hippophae rhamnoides L. subsp. sinensis Rousi in relation to environmental factors in Ulan Buh Desert during fruit stage.

HUANG Ya-ru^1,2, XIN Zhi-ming^1,2, LUO Hong-mei¹, LUO Feng-min^1,2, MA Ying-bin^1,2, GE Gen-batu^1,2, LI Xin-le^1,2, SUN Fei¹, HAO Yu-guang^1,2**

(¹Experimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou 015200, Inner Mongolia, China;²Desert Ecosystem Research Station, Dengkou, Inner Mongolia, State Forestry Administration, Dengkou 015200, Inner Mongolia, China)

Online:2015-11-10 Published:2015-11-10

摘要/Abstract

摘要： 利用TDP液流测量系统和自动气象站对乌兰布和沙漠中国沙棘（Hippophae rhamnoides L. subsp. sinensis Rousi）的液流变化及其环境因子进行观测。结果表明：沙棘的茎干液流速率呈“几”字宽峰曲线，昼夜变化明显，夜间仍有低值液流；液流启动时间为8:00，在10:00左右达到峰值，峰值大小为227.94～307.86 g·h^-1，至21:30基本下降到了极低值(11.04～26.29 g·h^-1)。沙棘液流速率变化趋势与环境因子变化趋势相吻合。晴天液流速率较大，变化幅度也大，变幅在300 g·h^-1以上；阴雨天液流速率变化小。相关性分析表明，影响沙棘液流速率的主要因子为太阳总辐射、空气相对湿度、空气温度以及风速。另外，沙棘液流与蒸腾速率日变化曲线均为单峰曲线，但叶片蒸腾速率峰值出现时间滞后液流峰值出现时间3 h。

关键词: 沙漠化逆转, 土壤有机碳, 固碳, 土壤颗粒

Abstract: In this study, Dynamax sap flow measuring system and automatic meteorological station were used to estimate stem sap flow of Hippophae rhamnoides L. subsp. sinensis Rousi and its relationships with environmental factors during fruit stage in Ulan Buh Desert. The results showed that the stem sap flow of H. rthamnoides fluctuated significantly, with a singlepeak curve from day to night. The sap flow started at 8:00. The peak value of the sap flow appeared at about 10:00, being 227.94-307.86 g·h^-1. The minimum value of the sap flow appeared at about 21:30, being 11.04-26.29 g·h^-1. The sap flow was closely related to environmental factors. The sap flow rate and variation on clear days were generally higher than on cloudy and rainy days. Total radiation, air relative humidity, air temperature and wind speed were the major factors affecting the stem sap flow rate of H. rthamnoides. Moreover, the diurnal variation characteristics of transpiration rate was similar to the sap flow rate, but the peak value of the transpiration rate lagged about 3 hours compared to that of the sap flow.

Key words: soil organic carbon, reversion of desertification, carbon sequestration, soil particle

黄雅茹1,2,辛智鸣1,2,罗红梅1,罗凤敏1,2,马迎宾1,2,葛根巴图1,2,李新乐1,2,孙非1,郝玉光1,2**. 乌兰布和沙漠中国沙棘果实成熟期茎干液流规律及其与环境因子的关系[J]. 生态学杂志.

HUANG Ya-ru1,2, XIN Zhi-ming1,2, LUO Hong-mei1, LUO Feng-min1,2, MA Ying-bin1,2, GE Gen-batu1,2, LI Xin-le1,2, SUN Fei1, HAO Yu-guang1,2**. Stem sap flow dynamics of Hippophae rhamnoides L. subsp. sinensis Rousi in relation to environmental factors in Ulan Buh Desert during fruit stage.[J]. cje.

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