干旱区生态环境知识资源中心(Arid): A Simple Light-Use-Efficiency Model to Estimate Wheat Yield in the Semi-Arid Areas

Arid

DOI	10.3390/agronomy10101524
	A Simple Light-Use-Efficiency Model to Estimate Wheat Yield in the Semi-Arid Areas
	Khabba, Said; Er-Raki, Salah; Toumi, Jihad; Ezzahar, Jamal; Ait Hssaine, Bouchra; Le Page, Michel; Chehbouni, Abdelghani
通讯作者	Khabba, S
来源期刊	AGRONOMY-BASEL
EISSN	2073-4395
出版年	2020
卷号	10 期号:10
英文摘要	In this study, a simple model, based on a light-use-efficiency model, was developed in order to estimate growth and yield of the irrigated winter wheat under semi-arid conditions. The originality of the proposed method consists in (1) the modifying of the expression of the conversion coefficient (epsilon(conv)) by integrating an appropriate stress threshold (k(sconv)) for triggering irrigation, (2) the substitution of the product of the two maximum coefficients of interception (epsilon(imax)) and conversion (epsilon(conv_max)) by a single parameter epsilon(max), (3) the modeling of epsilon(max) as a function of the Cumulative Growing Degree Days (CGDD) since sowing date, and (4) the dynamic expression of the harvest index (HI) as a function of the CGDD and the final harvest index (HI0) depending on the maximum value of the Normalized Difference Vegetation Index (NDVI). The calibration and validation of the proposed model were performed based on the observations of wheat dry matter (DM) and grain yield (GY) which were collected on the R3 irrigated district of the Haouz plain (center of Morocco), during three agricultural seasons. Further, the outputs of the simple model were also evaluated against the AquaCrop model estimates. The model calibration allowed the parameterization of epsilon(max) in four periods according to the wheat phenological stages. By contrast, a linear evolution was sufficient to represent the relationship between HI and CGDD. For the model validation, the obtained results showed a good agreement between the estimated and observed values with a Root Mean Square Error (RMSE) of about 1.07 and 0.57 t/ha for DM and GY, respectively. These correspond to a relative RMSE of about 19% for DM and 20% for GY. Likewise, although of its simplicity, the accuracy of the proposed model seems to be comparable to that of the AquaCrop model. For GY, R-2, and RMSE values were respectively 0.71 and 0.44 t/ha for the developed approach and 0.88 and 0.37 t/ha for AquaCrop. Thus, the proposed simple light-use-efficiency model can be considered as a useful tool to correctly reproduce DM and GY values.
英文关键词	wheat dry matter grain yield simple model cumulative growing degree days normalized difference vegetation index
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000584210100001
WOS关键词	PHOTOSYNTHETICALLY ACTIVE RADIATION ; ARID TROPICAL ENVIRONMENT ; FAO CROP MODEL ; SOLAR-RADIATION ; WINTER-WHEAT ; GRAIN-YIELD ; TEMPERATURE DATA ; AQUACROP MODEL ; HARVEST INDEX ; CERES-WHEAT
WOS类目	Agronomy ; Plant Sciences
WOS研究方向	Agriculture ; Plant Sciences
来源机构	French National Research Institute for Sustainable Development
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327216
作者单位	[Khabba, Said; Toumi, Jihad] Cadi Ayyad Univ, Fac Sci Semlalia, Dept Phys, LMFE, Marrakech 40000, Morocco; [Khabba, Said; Er-Raki, Salah; Ezzahar, Jamal; Ait Hssaine, Bouchra; Chehbouni, Abdelghani] Mohammed VI Polytech Univ UM6P, Ctr Remote Sensing Applicat CRSA, Benguerir 43150, Morocco; [Er-Raki, Salah] Cadi Ayyad Univ, ProcEDE, Dept Appl Phys, Fac Sci & Tech, Marrakech 40000, Morocco; [Ezzahar, Jamal] Cadi Ayyad Univ, MISCOM, Natl Sch Appl Sci ENSA, Safi 46000, Morocco; [Le Page, Michel; Chehbouni, Abdelghani] UPS, Ctr Space Studies BIOsphere CESBIO, CNES, CNRS,IRD, F-31400 Toulouse, France
推荐引用方式 GB/T 7714	Khabba, Said,Er-Raki, Salah,Toumi, Jihad,et al. A Simple Light-Use-Efficiency Model to Estimate Wheat Yield in the Semi-Arid Areas[J]. French National Research Institute for Sustainable Development,2020,10(10).
APA	Khabba, Said.,Er-Raki, Salah.,Toumi, Jihad.,Ezzahar, Jamal.,Ait Hssaine, Bouchra.,...&Chehbouni, Abdelghani.(2020).A Simple Light-Use-Efficiency Model to Estimate Wheat Yield in the Semi-Arid Areas.AGRONOMY-BASEL,10(10).
MLA	Khabba, Said,et al."A Simple Light-Use-Efficiency Model to Estimate Wheat Yield in the Semi-Arid Areas".AGRONOMY-BASEL 10.10(2020).