宁南黄土丘陵区山桃树干液流速率及其与气象因子的关系  

Relationships Between Sap Flow Velocity in Tree Trunks of Amygdalus davidiana and Meteorological Factors in Loess Hilly Regions of Southern Ningxia

作　　者：温淑红 韩新生 蔡进军[3,4] 许浩 马璠 万海霞 WEN Shu-hong;HAN Xin-sheng;CAI Jin-jun;XU Hao;MA Fan;WAN Hai-xia(Institute of Desertification Control,Ningxia Academy of Agriculture and Forestry Sciences,Key Laboratory of Desertification Control and Soil and Water Conservation of Ningxia,Ningxia Yinchuan 750002,China;Institute of Forest Ecology,Environment and Protection,Chinese Academy of Forestry,Key Laboratory of Forestry Ecology and Environment of National Forestry and Grassland Administration,Beijing 100091,China;Institute of Agricultural Resources and Environment,Ningxia Academy of Agriculture and Forestry,Ningxia Yinchuan 750002,China;College of Resources and Environment,Northwest A&F University,Shanxi Yangling 712100,China)

机构地区：[1]宁夏农林科学院荒漠化治理研究所,宁夏防沙治沙与水土保持重点实验室,宁夏银川750002 [2]中国林业科学研究院森林生态环境与保护研究所,国家林业和草原局森林生态环境重点实验室,北京100091 [3]宁夏农林科学院农业资源与环境研究所,宁夏银川750002 [4]西北农林科技大学资源与环境学院,陕西杨凌712100

出　　处：《西南农业学报》2020年第6期1301-1308,共8页Southwest China Journal of Agricultural Sciences

基　　金：宁夏回族自治区全产业链创新示范项目(QCYL-2018-12);国家重点研发计划(2016YFC0501702);宁夏回族自治区自然科学基金项目(2019AAC03148);宁夏农林科学院荒漠化治理研究所自主研发项目(HMS1901);国家林业和草原局宁夏六盘山森林生态定位站和宁夏回族自治区生态修复与多功能林业综合研究中心。

摘　　要：【目的】本文揭示了干旱缺水区林木的树干液流变化特征及其与主要气象因素的相关性。【方法】以宁南黄土丘陵区商讨人工林为研究对象,在2018年6-10月份,利用热扩散插针法对树干液流进行连续观测,同时结合HOB全自动气象站同步观测的气象因子,分析树干液流速率及其影响因素。【结果】①树干液流速率日变化特征在晴天呈单峰型曲线,阴雨天呈双峰或多峰型变化;日均树干液流速率的季节变化呈波浪状,但整体上有一个先升高后降低的变化趋势;液流启动时间在6月份为6:30,7-10月份为8:30。②各气象因子中太阳辐射和气温的日变化与树干液流相似,其他因子的相似度较低。③在生长季尺度上,太阳辐射和温度与液流速率呈极显著正相关(P<0.01),风速与液流速率呈极显著负相关(P<0.01),空气相对湿度不相关,不同月份影响树干液流的气象因子存在差异。④建立树干液流速率与主要气象因子的回归模型,预测山桃树干液流速率。【结论】本研究结果为宁南黄土丘陵区林木的生态水文过程和水资源综合管理提供科技支撑。【Objective】This paper aimed to reveal the characteristics of sap flow and its correlation with major meteorological factors in the dry and water-deficient areas.【Method】The plantation forests in the loess hilly region of southern Ningxia were used as research objects.In June and October 2018,thermal diffusion needles were used.The sap flow,combined with the meteorological factors of the HOB automatic meteorological station,were continuously investigated to analyze the sap flow rate and its influencing factors.【Result】(i)The daily variation of sap flow rate was unimodal on sunny days,and the curve showed a bimodal or multi-peak change in rainy days;The seasonal variation of daily average sap flow rate was wavy,but there was a trend of increasing first and then decreasing;The starting time of liquid flow in June was 6:30,7-10 months was 8:30.(ii)The daily variation of solar radiation and temperature in each meteorological factor was similar to that of sap flow,and the similarity of other factors was low.(iii)At the growing season scale,solar radiation and temperature were significantly positively correlated with liquid flow rate(P<0.01),and wind speed and liquid flow rate were significantly negatively correlated(P<0.01),and air relative humidity was not correlated.There were differences in meteorological factors affecting sap flow in different months.(iv)A regression model of sap flow rate and main meteorological factors were established to predict the sap flow rate of the mountain sap.【Conclusion】The research results would provide a scientific and technological support for the ecological hydrological process and integrated water resources management of forest trees in the loess hilly area of southern Ningxia.

关 键 词：液流速率 气象条件 山桃 黄土丘陵区 

分 类 号：S162[农业科学—农业气象学]