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Accueil du site → Doctorat → Chine → 2021 → Water and Fertilizer Response of Forage Crops and Optimal Allocation of Irrigation Water under Different Planting Patterns in Desert Area of Northern Xinjiang

Inner Mongolia Agricultural University (内蒙古农业大学) 2021

Water and Fertilizer Response of Forage Crops and Optimal Allocation of Irrigation Water under Different Planting Patterns in Desert Area of Northern Xinjiang

刘虎

Titre : Water and Fertilizer Response of Forage Crops and Optimal Allocation of Irrigation Water under Different Planting Patterns in Desert Area of Northern Xinjiang

Auteur : 刘虎

Grade : Doctoral Dissertation 2021

Université : Inner Mongolia Agricultural University (内蒙古农业大学)

Résumé partiel
The arid desert area of Northern Xinjiang is located in the pastoral area of Northwest China,which has the characteristics of drought and less rain,shortage of water resources,high pressure of grass and livestock,extensive irrigation water management and lack of research on the response of forage water and fertilizer.In this study,silage corn and alfalfa were used as the main experimental objects to carry out the insufficient irrigation and fertilizer coupling experiment,in order to solve the specific problems in the construction of irrigated forage grassland,such as unclear irrigation water law,lack of forage crop coefficient,lack of irrigation water management strategy,low utilization efficiency of water and fertilizer,incoordination of fertilization and irrigation amount in time and space experiment.Based on the analysis of water requirement law,output effect and irrigation water benefit of irrigated forage crops under the condition of intercropping,the optimal intercropping combination mode of alfalfa and silage maize was put forward,the simplified calculation method of ET0in the area lacking data was optimized,and the forage crop coefficient Kcrecommended by FAO was modified.Based on the least square method,the crop water model of sudangrass,alfalfa and silage corn was determined,and the dynamic programming method was used to optimize the allocation of irrigation water,and the decision-making scheme of irrigation water management for irrigation forage field under different water supply conditions was put forward ;the mathematical model of water and fertilizer coupling yield of irrigation forage under monoculture and mixed intercropping conditions was constructed,and the optimal allocation method was put forward The research results of water and fertilizer response relationship and optimal allocation of irrigation water for forage crops in arid desert area of Northern Xinjiang have been formed.

Mots clés : Inadequate irrigation ;Crop water requirement law ;Crop-water model ;Crop coefficient ;Dynamic programming ;Optimization of irrigation system ;Water and fertilizer coupling ;Single and mixed intercropping of forage ;

Présentation (CNKI)

Page publiée le 16 février 2022