Rumeng Sun

Hubei Polytechnic University

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Ying Zhang

Nanjing University of Science and Technology

Jianhua Zhang

Hong Kong Baptist University

Feng He

Chinese Academy of Agricultural Sciences

Wenjiang Jing

Yangzhou University

Hongxia Zhang

Third Affiliated Hospital of Harbin Medical University

J. K. Shi

National Space Science Center

Huiyi Fei

Hubei Polytechnic University

Xiaodong Ming

Hubei Polytechnic University

Qinghao Meng

Yangzhou University

Hao Zhang

National University of Defense Technology

Cooperative Institutions

Yangzhou University

Chinese Academy of Sciences

Hubei Polytechnic University

Chinese Academy of Agricultural Sciences

Harbin Medical University

Tianjin University

Ministry of Education of the People's Republic of China

University of Chinese Academy of Sciences

Nanjing University of Science and Technology

Xidian University

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Cooperative Effect of Alternate Wetting and Drying Irrigation and Rice Variety Improvement on Increasing Yield and Water Use Efficiency

Qinghao Meng Wenjiang Jing Nan Zhang Rumeng Sun Yin Jia

Enhancing rice (Oryza sativa L.) productivity and optimizing water use efficiency (WUE) are critical for advancing sustainable agricultural practices. This study selected six mid-season indica rice varieties to investigate the impacts of alternate wetting and drying irrigation (AWD) and conventional irrigation (CI) on grain yield, WUE, grain filling, and root traits. A two-year field experiment demonstrated that AWD significantly enhanced grain yield and WUE. Flag leaf photosynthetic rate and root characteristics, including root weight, root length, root absorbing surface area, root oxidation activity, and zeatin (Z) + zeatin riboside (ZR) contents in panicles, roots, and root bleeding, were superior under AWD across early, mid, and late grain filling stages. The flag leaf photosynthetic rate and root traits, such as root weight, root length, root absorbing surface area, root oxidation activity, and zeatin (Z) + zeatin riboside (ZR) contents in panicles, roots, and root exudates, were found to be superior under AWD during the early, mid, and late grain filling stages. Notably, AWD delayed root senescence during the grain filling stage, which sustained root activity and promoted grain filling, particularly in inferior spikelets. These results indicate that AWD is a promising irrigation regime to improve rice yield and WUE by optimizing grain filling and root traits.

Water use

10.20944/preprints202502.0005.v1

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Fabrication of Self-Aggregated Wires-on-Pores Hierarchical Nanostructures Aluminum Oxide Films by Anodization and Chemical Etching Method

Chao Fu Xiaodong Ming Huiyi Fei Rumeng Sun Hongxia Zhang

Anodization increases the hardness and corrosion resistance of aluminum through the formation of a porous-structured anodic aluminum oxide (AAO) film on the surface. In comparison to the discontinuous 3D structures of AAO wires, the superhydrophobic properties of this planar two-dimensional porous structure are not particularly pronounced after hydrophobic modification. In this study, we adjusted the parameters of the anodization process to achieve milder oxidation and chemical etching conditions, resulting in the formation of hierarchical nanostructures with self-aggregated wires-on-pores features in the AAO structure. This structure exhibited superhydrophilicity, and after modification with myristic acid, the hierarchical nanostructure demonstrated even more outstanding superhydrophobic properties than the nanoporous structures formed under traditional anodization conditions, with a contact angle reaching 155.96±4.6°. Characterization of the hierarchical nanostructures using scanning electron microscopy (SEM) and energy dispersive spectrometer elucidated that these structures were formed by the self-aggregation of nanowires resulting from the etching of the thicker porous AAO film due to surface tension. Electrochemical workstation tests confirmed that the wires-on-pores nanostructures possessed a certain corrosion resistance.

Anodizing

Isotropic etching

Aluminum Oxide

10.2139/ssrn.4641668

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