Research on the Construction of Water-Saving Planting Systems and Supporting Technology

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Water Use and Irrigation".

Deadline for manuscript submissions: closed (25 July 2024) | Viewed by 3227

Special Issue Editor


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Guest Editor
College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
Interests: crop high-yield and quality irrigation technology and application; mechanisms of soil–microbe–plant interactions; functional irrigation theory, equipment and technology

Special Issue Information

Dear Colleagues,

Due to the escalating impact of global climate change and the persistent growth of population, water scarcity has become an increasingly critical issue. The inefficient use of water resources has hindered the sustainable development of agriculture. Consequently, conserving water and enhancing irrigation efficiency have become imperative issues in contemporary agricultural development. Water-saving technology and its accompanying tools represent a novel approach to agricultural production. Several urgent issues need to be solved: firstly, an improvement in irrigation technology, which involves the use of advanced moisture sensors and automated control systems to enable precise measurement and accurate water supply; and secondly, enhancing soil water retention capacity through measures like soil improvement and cover protection, reducing water evaporation and seepage. Additionally, research on the selection and cultivation of plant varieties is necessary to adapt to growth requirements in arid conditions. Finally, research on agricultural management techniques, including appropriate fertilization, pest and disease control, and soil conservation, should also be conducted.

In this Special Issue, we aim to present the current knowledge on reducing agricultural water usage and minimizing the wastefulness of water resources while simultaneously ensuring crop yield and quality through the application of advanced technological approaches.

Dr. Yunpeng Zhou
Guest Editor

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Keywords

  • water-saving planting systems
  • sustainable agriculture
  • irrigation technology
  • decision support system
  • irrigation scheduling
  • nutrient management

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Published Papers (2 papers)

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Research

17 pages, 1960 KiB  
Article
Optimizing Spring Maize Growth and Yield through Balanced Irrigation and Nitrogen Application: A TOPSIS Method Approach
by Yongqi Liu, Jian Gu, Ningning Ma, Xue Li, Guanghua Yin and Shijun Sun
Agronomy 2024, 14(8), 1825; https://doi.org/10.3390/agronomy14081825 - 19 Aug 2024
Cited by 2 | Viewed by 1799
Abstract
Water and nitrogen are crucial for producing spring maize. Currently, irrigation and fertilization systems often rely on a single indicator, resulting in inefficient practices. This study aims to determine an optimal nitrogen application rate for shallow buried drip irrigation (SBDI) to balance growth [...] Read more.
Water and nitrogen are crucial for producing spring maize. Currently, irrigation and fertilization systems often rely on a single indicator, resulting in inefficient practices. This study aims to determine an optimal nitrogen application rate for shallow buried drip irrigation (SBDI) to balance growth characteristics, yield (Y), water use efficiency (WUE), and soil nitrogen levels. In a typical semi-arid region of Northeast China, we conducted controlled experiments from 2022 to 2023, adopting a two-factor quadratic saturation D-optimal design method to study the effects of different irrigation amounts (145.40, 271.70, 348.20, and 436.20 mm) and nitrogen fertilizer application amounts (34.80, 185.90, 277.40, and 382.80 kg·hm−2) on spring maize. The results indicate that increasing both irrigation and nitrogen application rates can enhance dry matter accumulation (DMA) from 15.17% to 32.70%. The impact of irrigation and fertilization on the net photosynthetic rate (Pn) of spring maize was greater for the irrigation applications than the nitrogen applications, particularly at 9:00 a.m. and 13:00 p.m. and slightly less so at 11:00 a.m. and 15:00 p.m. Concurrently, there were significant increases in total nitrogen (TN1 by 20.85% in the 0–20 cm soil layer; TN2 by 33.33% in the 20–40 cm soil layer) and alkali-hydrolyzed nitrogen (AHN1 by 14.65% at 0–20 cm; AHN2 by 28.86% at 20–40 cm). Y improved from 12.02% to 44.09%, and WUE increased from 20.08% to 140.07%. The optimal water and fertilizer management mode for spring maize SBDI in semi-arid areas was determined through comprehensive analysis using the TOPSIS entropy weight method. When the irrigation amount is 436.20 mm, and the nitrogen fertilizer application amount is 277.40 kg·hm−2, it can significantly promote the DMA, Y, WUE, photosynthetic characteristics, and soil nitrogen content of spring maize. This study provides a theoretical basis for the practical application of SBDI water–fertilizer coupling for spring maize. Full article
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21 pages, 4337 KiB  
Article
Optimizing Crop Spatial Structure to Improve Water Use Efficiency and Ecological Sustainability in Inland River Basin
by Zihan Wu, Sunxun Zhang, Baoying Shan, Fan Zhang and Xi Chen
Agronomy 2024, 14(8), 1645; https://doi.org/10.3390/agronomy14081645 - 27 Jul 2024
Cited by 2 | Viewed by 1093
Abstract
Inland arid basins face the challenge of ecological deterioration due to insufficient water availability. The irrigation water consumption depletes the water flowing into the downstream tailrace ecological wetland, leading to increasing ecological deterioration. It is urgent to optimize the management of irrigation water [...] Read more.
Inland arid basins face the challenge of ecological deterioration due to insufficient water availability. The irrigation water consumption depletes the water flowing into the downstream tailrace ecological wetland, leading to increasing ecological deterioration. It is urgent to optimize the management of irrigation water resources in the middle reaches and improve the ecological sustainability of the lower reaches. To ensure sustainable development, improving water use efficiency and preserving the health of basin ecosystems should be simultaneously considered in the agricultural water management of these regions. Therefore, a 0–1 integer multi-objective programming approach was proposed to optimize midstream crop planting. This method has advantages in (1) effectively balancing ecological sustainability, agricultural production, and water-saving goals; (2) linking irrigation district management with grid geographic information to develop land use strategies; and (3) obtaining optimal solutions for multi-objective synergies. The proposed approach is applied to a typical inland river basin in China, the Heihe River Basin in Gansu Province. Results indicate that the optimization schemes can increase agricultural benefits, crop suitability, water use efficiency, and ecological quality by 12.37%, 6.82%, 13.00%, and 8.04% (compared to 2022), respectively, while irrigation water can be saved about 7.53%. The optimization results and proposed approach can help decision-makers manage water resources in the Heihe River Basin and similar regions. Full article
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