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Frontiers of Agricultural Science and Engineering doi: 10.15302/J-FASE-2023521
● Score index methods readily discriminate genotypes adapted to a target environment.
Keywords： Aerobic rice breeding selection drought resilience production capacity index resilience capacity index stress score index upland
Zhenling CUI, Zhengxia DOU, Hao YING, Fusuo ZHANG
Frontiers of Agricultural Science and Engineering 2020, Volume 7, Issue 1, Pages 14-20 doi: 10.15302/J-FASE-2019295
Balancing crop productivity with resource use efficiency and beneficial environmental consequences is essential for sustainable agricultural development worldwide. Various strategies and approaches have been proposed and debated, but turning the concept into management practices in the field with measurable outcomes over several scales remains a challenge. An innovative approach, Integrated Soil-Crop System Management (ISSM), for producing more grain with greater nutrient use efficiencies and less environmental pollution is presented. The ISSM approach has been used in China, in field experiments as well as in thousands of farmer fields, to substantially increase the yields of maize, rice and wheat while simultaneously increasing nitrogen use efficiency and reducing environmental footprints. The scientific principle, implementation strategy and procedures of ISSM are discussed and examples of its demonstrated successes at local and regional levels across China are given. Perspectives for further development of ISSM and expanding its potential impact are also proposed and discussed.
Keywords： China environmental protection food security high-yielding nitrogen management
Material Mechanical Properties Necessary for the Structural Intervention of Concrete Structures Article
Tamon Ueda
Engineering 2019, Volume 5, Issue 6, Pages 1131-1138 doi: 10.1016/j.eng.2019.02.012
Structural intervention involves the restoration and/or upgrading of the mechanical performances of structures. In addition to concrete and steel, which are typical materials for concrete structures, various fiber-reinforced polymers (FRP), cementitious materials with fibers, polymers, and adhesives are often applied for structural intervention. In order to predict structural performance, it is necessary to develop a generic method that is applicable to not only to steel, but also to other materials. Such a generic model could provide information on the mechanical properties required to improve the structural performance. External bonding, which is a typical scheme for structural intervention, is not applied for new structures. It is necessary to clarify material properties and structural details in order to achieve better bonding strength at the interface between the substrate concrete and an externally bonded material. This paper presents the mechanical properties of substrate concrete and relevant intervention material for the following purposes: ① to achieve better shear strength and ultimate deformation of a member after structural intervention; and ② to achieve better debonding strength for external bonding. This paper concludes that some of the mechanical properties and structural details for intervention materials that are necessary for improvement in mechanical performance in structures with structural intervention are new, and differ from those of structures without intervention. For example, high strength and stiffness are important properties for materials in structures without structural intervention, whereas high fracturing strain and low stiffness are important properties for structural intervention materials.
Keywords： Structural intervention High fracturing strain No yielding Low stiffness Roughness fiber-reinforced
Title Author Date Type Operation
Isolating higher yielding and more stable rice genotypes in stress environments: fine-tuning a selection
Journal Article
Producing more with less: reducing environmental impacts through an integrated soil-crop system management approach
Zhenling CUI, Zhengxia DOU, Hao YING, Fusuo ZHANG
Journal Article
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