干旱区生态环境知识资源中心(Arid): 黄土高原苹果树叶片气孔导度的环境响应与模拟

Arid

	黄土高原苹果树叶片气孔导度的环境响应与模拟
其他题名	Environmental response and modeling of stomatal conductance of apple trees on the Loess Plateau
	苗玉; 高冠龙; 李伟
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2021
卷号	44 期号:2 页码:1000-6060
中文摘要	气孔导度(g_s)是衡量植物与外界环境中水、CO_2等物质交换速率的重要参数,其观测与模拟可以有效指示物质交换情况及各项生理参数。通过LI-6400便携式光合测定仪对黄土高原苹果树叶片各项生理参数进行观测,分析g_s日变化特征及其与环境因子的响应关系,运用Jarvis模型和Ball-Woodrow-Berry(BWB)模型对g_s进行模拟。研究结果显示:(1)黄土高原苹果树g_s日变化在气温较高、辐射较强的8、9月观测日内呈双峰曲线。上午(8:0012:00)随着太阳辐射逐渐增强,气孔张开,g_s在11:0013:00出现第一次峰值;中午(12:0014:00)由于气温(T_a)升高,为避免细胞散失过多水分,气孔关闭出现短暂的光合午休现象;午后(14:0018:00),随着T_a、光合有效辐射(PAR)下降,g_s逐渐增加并在15:0017:00出现第二次峰值。(2)通过灰色关联度分析,发现g_s与各环境因子的关联程度依次为:PAR(0.731)>CO_2浓度(C_a,0.712)>饱和水汽压差(VPD,0.702)>T_a(0.689)>相对湿度(hs,0.673)。g_s与各环境因子的响应关系表现为:随PAR、T_a、C_a、hs的增大而增大,随VPD的增大而减小。(3)从g_s的模拟结果可以看出,Jarvis模型的决定系数(0.678)、修正效率系数(0.335)和修正一致系数(0.803)均优于BWB模型各值(0.329、-1.630、0.138),而平均绝对误差(0.103)小于BWB模型(0.143),表明Jarvis模型模拟效果较好。通过对黄土高原苹果树叶片g_s环境响应与模拟的分析研究,对于掌握苹果树叶片一天内不同时刻对水分的需求变化,进一步提高该地区苹果树种植的水资源利用效率具有重要意义。
英文摘要	In this study, stomatal conductance (g_s) was used to measure the exchange rate of water, CO_2, and other substances between plants and the external environment. The observation and simulation of g_s effectively indicated the exchange of substances and various physiological parameters. The Loess Plateau is typical of a temperate monsoon climatic zone in China and supports an agricultural area dominated by the cultivation of apple trees. In this study, an LI-6400 portable photosynthesis system was used to observe the physiological parameters of apple trees in situ on the Loess Plateau, the diurnal variation characteristics of their g_s, and the relationships of these variables with environmental factors. The g_s was simulated using the Jarvis model and the Ball-Woodrow- Berry (BWB) model. The results show that (1) the diurnal variation of g_s in apple trees on the Loess Plateau showed a bimodal curve in August and September when temperatures were high and radiation was strong. The solar radiation increased gradually in the morning_s (8:0012:00), the stomata opened, and the first peak of g_s appeared between 11:00 and 13:00. Around the noon hour (12:0014:00), stimulated by the increase in temperature (T_a), the stomata of plants closed for a short period during themidday depression of photosynthesis to reduce water loss from plant cells. In the afternoon (14:0018:00), as T_a and photosynthetically-active radiation (PAR) decreased, g_s gradually increased, and a second peak appeared between 15:00 and 17:00. (2) Using the gray correlation degree, the correlation between g_s and various environmental factors was as follows (in descending order): (PAR, 0.731)>CO_2 concentration (C_a, 0.712)>vapor pressure deficit (VPD, 0.702)>T_a (0.689)> relative humidity (hs, 0.673). The response relationship between g_s and the various environmental factors produced the following results: (1) it increased with increases in PAR, T_a, C_a, and hs and decreased with increases in VPD, and (2) The simulation of g_s showed that the value of the determination coefficient (0.678), the modified coefficient of efficiency (0.335), and the modified index of agreement (0.803) were higher in the Jarvis model than in the BWB model (0.329, -1.630, 0.138), and the mean absolute error (0.103) was smaller than the error in the BWB model (0.143). Comparison of the simulation accuracy of multiple models showed that the Jarvis model had superior simulation accuracy. The results of the analysis of g_s in response to environmental factors and its simulation in apple tree leaves on the Loess Plateau is important to understand how the demand for water by the leaves changes throughout the day. This knowledge can be used to improve the efficiency of water utilization and thus optimize the harvest. In the future, simulation studies of g_s for a variety of crops grown in arid and semi-arid climatic conditions may benefit from the application of the Jarvis model in resource management.
中文关键词	气孔导度 ; 灰色关联度 ; 苹果树 ; 黄土高原
英文关键词	stomatal conductance grey relational degree analysis apple tree Loess Plateau
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6950266
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/365016
作者单位	苗玉, 山西大学环境与资源学院, 太原, 山西 030006, 中国.; 李伟, 山西大学环境与资源学院, 太原, 山西 030006, 中国.; 高冠龙, 山西大学环境与资源学院;;陕西省土地整治重点实验室;;中国科学院西北生态环境资源研究院, ;;陕西省土地整治重点实验室;;, 太原;;西安;;兰州, 山西;;陕西;;甘肃 030006;;710064;;730000, 中国.
推荐引用方式 GB/T 7714	苗玉,高冠龙,李伟. 黄土高原苹果树叶片气孔导度的环境响应与模拟[J],2021,44(2):1000-6060.
APA	苗玉,高冠龙,&李伟.(2021).黄土高原苹果树叶片气孔导度的环境响应与模拟.干旱区地理,44(2),1000-6060.
MLA	苗玉,et al."黄土高原苹果树叶片气孔导度的环境响应与模拟".干旱区地理 44.2(2021):1000-6060.