نتایج جستجو برای: aquacrop model

تعداد نتایج: 2104449  

2014
Xiu-liang Jin Hai-kuan Feng Xin-kai Zhu Zhen-hai Li Sen-nan Song Xiao-yu Song Gui-jun Yang Xin-gang Xu Wen-shan Guo

Improving winter wheat water use efficiency in the North China Plain (NCP), China is essential in light of current irrigation water shortages. In this study, the AquaCrop model was used to calibrate, and validate winter wheat crop performance under various planting dates and irrigation application rates. All experiments were conducted at the Xiaotangshan experimental site in Beijing, China, dur...

Journal: :Environmental science. Processes & impacts 2015
M Shahjahan Mondal Abul Fazal M Saleh Md Abdur Razzaque Akanda Sujit K Biswas Abu Zofar Md Moslehuddin Sinora Zaman Attila N Lazar Derek Clarke

The FAO AquaCrop model has been widely applied throughout the world to simulate crop responses to deficit water applications. However, its application to saline conditions is not yet reported, though saline soils are common in coastal areas. In this study, we parameterized and tested AquaCrop to simulate rice yield under different salinity regimes. The data and information required in the model...

2017
Paolo Cosmo Silvestro Stefano Pignatti Hao Yang Guijun Yang Simone Pascucci Fabio Castaldi Raffaele Casa

Process-based models can be usefully employed for the assessment of field and regional-scale impact of drought on crop yields. However, in many instances, especially when they are used at the regional scale, it is necessary to identify the parameters and input variables that most influence the outputs and to assess how their influence varies when climatic and environmental conditions change. In...

Journal: :تحقیقات آب و خاک ایران 0
غزاله ضیایی کارشناس ارشد آبیاری و زهکشی دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، گروه مهندسی آب حسین بابازاده استادیار دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، گروه مهندسی آب فریبرز عباسی استاد پژوهشی مرکز تحقیقات فنی و مهندسی کشاورزی کرج فریدون کاوه دانشیار دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، گروه مهندسی آب

importance of fresh water in agriculture along with the essential demand of the growing population for food, indicates an extreme necessity of the optimum use of water. to this end, plant growth simulation models have been introduced in agricultural sciences to reach maximum yields in varying climates. variations in the of developed models cause difficulties for the unprofessional users. the aq...

2017
Joanna A Horemans Hanne Van Gaelen Dirk Raes Terenzio Zenone Reinhart Ceulemans

We calibrated and evaluated the agricultural model AquaCrop for the simulation of water use and yield of a short-rotation coppice (SRC) plantation with poplar (Populus) in East Flanders (Belgium) during the second and the third rotation (first 2 years only). Differences in crop development and growth during the course of the rotations were taken into account during the model calibration. Overal...

Journal: :آب و خاک 0
آیدا مهر آذر جابر سلطانی امید رحمتی

introduction: limited water resources and its salinity uptrend has caused reducing water and soil quality and consequently reducing the crop production. thus, use of saline water is the management strategies to decrease drought and water crisis. furthermore, simulation models are valuable tools for improving on-farm water management and study about the effects of water quality and quantity on c...

Journal: :Water science and technology : a journal of the International Association on Water Pollution Research 2013
Wanhong Zhang Wenzhao Liu Qingwu Xue Jie Chen Xiaoyang Han

The objective of this study was to evaluate the performance of the FAO-AquaCrop model in winter wheat in the southern Loess Plateau of China. Multi-year field experimental data from 2004 and 2011 were used to calibrate and validate the model for simulating biomass, canopy cover (CC), soil water content, and grain yield under rainfed conditions. The model performance was evaluated using root mea...

Journal: :تحقیقات مهندسی کشاورزی 0
مهدی اکبری استادیار موسسه تحقیقات فنی و مهندسی کشاورزی

the greatest limitations to agricultural development and production in iran are scarcity of water resources, ineffective irrigation scheduling and wasteful water usage. avenues discussed for optimum water use include improving water productivity by improving irrigation scheduling, farm water management and water profitability. the present study evaluated current water use and ways to improve wi...

Journal: :آب و خاک 0
مسعود محمدی بیژن قهرمان کامران داوری حسین انصاری علی شهیدی

introduction: fao aquacrop model (raes et al., 2009a; steduto et al., 2009) is a user-friendly and practitioner oriented type of model, because it maintains an optimal balance between accuracy, robustness, and simplicity; and it requires a relatively small number of model input parameters. the fao aquacrop model predicts crop productivity, water requirement, and water use efficiency under water...

Journal: :Environmental Modelling and Software 2014
Eline Vanuytrecht Dirk Raes Patrick Willems

This study includes a global sensitivity analysis of the water productivity model AquaCrop. The study rationale consisted in a comprehensive evaluation of the model and the formulation of guidelines for model simplification and efficient calibration. The global analysis comprehended a Morris screening followed by a variance-based Extended Fourier Amplitude Sensitivity Test (EFAST) under diverse...

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