干旱区生态环境知识资源中心(Arid): 覆膜和水分亏缺对春小麦光合特性影响及模型比较

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	覆膜和水分亏缺对春小麦光合特性影响及模型比较
其他题名	Effects of Water Deficit on Photosynthetic Characteristics of Spring Wheat under Plastic Mulching and Comparison of Light Response Curve Models
	段萌; 杨伟才; 毛晓敏
来源期刊	农业机械学报
ISSN	1000-1298
出版年	2018
卷号	49 期号:1 页码:219-227
中文摘要	为揭示西北干旱地区覆膜条件下水分亏缺对春小麦光合生理特征的影响及光响应模型的适用性,以春小麦为试验材料,分别设置充分灌溉不覆膜(W1M0)、充分灌溉覆膜(W1M1)、亏缺灌溉不覆膜(W2M0)和亏缺灌溉覆膜(W2M1)4个处理,测定春小麦灌浆期的光响应曲线,通过对5种常用的光响应模型进行分析比较,探讨覆膜条件下水分亏缺对春小麦光合特性的影响并对光响应模型的适用性进行评价。结果表明,水分亏缺会降低春小麦叶片的最大净光合速率(P_(max))、表观量子效率(AQY)、暗呼吸速率(R_d),而光补偿点(LCP)升高。而在水分亏缺条件下覆膜处理能够有效减缓春小麦光合速率的下降,同时提高了春小麦叶片的最大净光合速率(P_(max))、表观量子效率(AQY)、暗呼吸速率(R_d)等表征春小麦光合特性的生理指标。其中,5种模型的模拟效果在W2M0处理下具有明显差别,只有叶子飘模型拟合值与实测值最为相符,尤其在高光强条件下拟合效果更为贴切,决定系数(R~2)大于0.9;而直角双曲线模型、非直角双曲线模型、指数模型和动力学模型拟合效果较差,在高光强条件下光合速率仍然是增加的,并未下降,R~2只有0.7左右;叶子飘模型在不覆膜亏水条件下适用性较好。从决定系数的均值比较来看,对于4个处理拟合效果优劣排序为叶子飘模型、指数模型、非直角双曲线模型、直角双曲线模型和动力学模型。
英文摘要	In order to investigate the response of photosynthetic characteristics of spring wheat under water deficit and plastic mulching conditions in Northwest China, field experiment was conducted with four treatments, including full irrigation without mulching (W1M0), full irrigation with mulching (W1M1), deficit irrigation without mulching (W2M0) and deficit irrigation with mulching (W2M1). The light response curves were monitored with five different light response curve models which were compared. The influences of field mulching and water deficit on photosynthesis of spring wheat were discussed and the applicability of the light response models were evaluated. The results showed that water deficit can reduce the main characteristic parameters, including maximum net photosynthesis rate (P_(max)), apparent quantum efficiency (AQY), dark respiration rate (R_d), while light compensation point (LCP) was increased. However, treatments of mulching can slow down the decrease of spring wheat photosynthetic rate effectively. There were obvious differences for treatment W2M0 in the simulation results of the five models, where only Ye ZiPiao model could well fit the actual values, and especially for the high photosynthetic active radiation section, with the coefficient of determination (R~2) greater than 0.9, while the fitting effects of the rectangular hyperbolae model, the non-rectangular hyperbolae model, the exponential model and the kinetics model were poor, which were only about 0.7. Their determination coefficients were in the descending order as Ye ZiPiao model, non-rectangular hyperbolae model, exponential model, rectangular hyperbolae model and kinetics model.
中文关键词	春小麦 ; 覆膜 ; 水分亏缺 ; 光合特征 ; 光响应曲线 ; 光响应模型
英文关键词	spring wheat plastic mulching water deficit photosynthetic characteristics light response curve light response models
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6151878
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378943
作者单位	段萌, 中国农业大学水利与土木工程学院, 北京 100083, 中国.; 杨伟才, 中国农业大学水利与土木工程学院, 北京 100083, 中国.; 毛晓敏, 中国农业大学水利与土木工程学院, 北京 100083, 中国.
推荐引用方式 GB/T 7714	段萌,杨伟才,毛晓敏. 覆膜和水分亏缺对春小麦光合特性影响及模型比较[J],2018,49(1):219-227.
APA	段萌,杨伟才,&毛晓敏.(2018).覆膜和水分亏缺对春小麦光合特性影响及模型比较.农业机械学报,49(1),219-227.
MLA	段萌,et al."覆膜和水分亏缺对春小麦光合特性影响及模型比较".农业机械学报 49.1(2018):219-227.