中国P站

water use efficiency; drought stress; crop resilience; sustainable agriculture; irrigation strategies; molecular breeding; genetic manipulation; arid regions; climate change; precision farming

Introduction

The imperative to enhance water use efficiency (WUE) in agriculture stands as a cornerstone for achieving sustainable global food security. This collection of research deeply explores the myriad strategies and intrinsic mechanisms that plants and agricultural systems employ to manage water scarcity effectively. At a foundational level, reviews delve into the intricate physiological and molecular mechanisms plants utilize to bolster WUE, particularly under drought conditions. These mechanisms range from precise stomatal regulation to efficient root architecture, extending into complex molecular pathways. Such insights are crucial for guiding the development of new drought-resilient crop varieties, ensuring future agricultural stability.[1] Addressing specific geographical challenges, detailed discussions cover various strategies for improving WUE within arid and semi-arid regions. This body of work critically examines both long-standing traditional methods and cutting-edge modern approaches, consistently highlighting the undeniable importance of integrated management systems. These systems are key to effectively confronting the pervasive water scarcity issues that characterize these highly vulnerable environments.[2] Furthermore, a significant portion of research concentrates on cereal crops, which are fundamental to global food supply. These studies meticulously synthesize findings on integrated approaches that combine improved agronomic practices, advanced genetic enhancements, and sophisticated precision technologies. The ultimate goal is to secure sustainable production amidst a changing climate, making the most of limited water resources.[3] Within horticulture, a sector vital for fruit and vegetable supply, diverse strategies are actively explored to boost WUE. These range from highly sophisticated genetic manipulation techniques to the practical implementation of advanced precision irrigation systems. This broad and comprehensive overview offers invaluable insights into the optimal allocation and use of water resources, aiming to maximize productivity in fruit and vegetable cultivation.[4] Understanding how multiple environmental factors interact is also critical. A meta-analysis, for instance, precisely quantifies the interactive effects of combined stress factors, specifically elevated Carbon Dioxide (CO2) levels and drought, on the water-use efficiency of key agricultural crops. This analytical approach yields crucial predictive data concerning future crop performance and aids in the development of agricultural systems inherently resilient to complex environmental pressures.[5] Beyond genetic and environmental considerations, irrigation practices are central to water management in agriculture. A global review comprehensively assesses the multifaceted impacts of different irrigation strategies on both crop water use efficiency and overall yield. By synthesizing findings from diverse agricultural contexts worldwide, this review offers practical, actionable insights for refining irrigation practices, thereby fostering sustainable water management and enhancing global food production.[6] In parallel, the frontier of molecular breeding is rapidly advancing. Papers explore the current status and future trajectory of molecular breeding techniques specifically aimed at improving crop water use efficiency. They detail genetic approaches designed to enhance plant resilience and productivity under water-limited conditions, pointing towards transformative and innovative solutions for sustainable agriculture in the coming decades.[7] Technological innovations, particularly in micro-irrigation systems, are also transforming modern agriculture. Recent advancements in these systems are critically reviewed for their pivotal role in improving WUE. These technologies enable remarkably precise water delivery, which significantly minimizes waste and optimizes resource allocation across a wide array of crops, representing a paradigm shift in efficient agricultural water use.[8] Applied research further delves into the specific physiological responses and water use efficiency of various fruit trees when subjected to different irrigation regimes. This work provides granular insights into precisely how specific watering strategies directly influence growth, yield, and the overall water productivity of horticultural crops, offering guidance for practitioners.[9] Lastly, the significant challenges and burgeoning opportunities inherent in enhancing crop water use efficiency within dryland farming systems are rigorously addressed. This area is crucial for sustainable agriculture, highlighting innovative practices and technologies that can effectively maximize productivity even in the most water-scarce environments, reinforcing the collective global effort towards agricultural sustainability.[10]

Description

The field of agricultural water use efficiency (WUE) is a dynamic and essential area of research, driven by the critical need to address global food security amidst escalating water scarcity and the pervasive impacts of climate change. Studies within this domain illuminate the multifaceted physiological and molecular mechanisms that plants adeptly employ to optimize their water usage, particularly when subjected to the stress of drought conditions. These intricate mechanisms span a broad spectrum, from the precise regulation of stomatal openings and the strategic development of root architecture to the activation of complex molecular pathways. Such detailed understanding offers invaluable insights crucial for breeding more robust, drought-resilient crop varieties, thereby securing future agricultural stability [1]. Beyond the inherent biology of the plant, the specific challenges presented by arid and semi-arid regions demand specialized and targeted interventions. Research in this area comprehensively discusses various strategies meticulously tailored for these vulnerable environments, thoughtfully integrating both time-tested traditional approaches and innovative modern technologies to enhance WUE through holistic, integrated management practices [2]. Furthermore, the broader challenges and burgeoning opportunities associated with improving crop water use efficiency in dryland farming systems are also thoroughly explored, highlighting the innovative practices that hold significant promise for maximizing agricultural productivity even in the most water-scarce settings [10].

Specific crop types receive intensive focused attention due to their paramount importance in the global food supply chain. Cereal crops, for instance, are the direct subject of extensive research that explores integrated approaches. These approaches judiciously combine advanced agronomic practices, sophisticated genetic improvements, and cutting-edge precision technologies. The overarching goal here is to ensure resilient and sustainable production with finite water resources, particularly under the increasing pressures of a dynamically changing climate [3]. Similarly, the horticulture sector, vital for global fruit and vegetable production, features prominently in these studies, which highlight diverse and inventive strategies aimed at significantly boosting WUE. These strategies span an impressive range, from highly advanced genetic manipulation techniques to the practical and efficient implementation of state-of-the-art precision irrigation systems. This provides a broad and comprehensive overview of the latest advancements dedicated to optimizing water resources within this crucial agricultural sector [4].

Further complicating the intricate picture of water management are combined environmental stressors, which often interact in complex ways. A notable meta-analysis critically examines the water-use efficiency of key agricultural crops specifically under the dual pressures of elevated Carbon Dioxide (CO2) levels and chronic drought. This rigorous work precisely quantifies their interactive effects, thereby offering crucial predictive data for anticipating future crop performance and, more broadly, informing the intelligent development of agricultural systems that are inherently resilient to multifaceted environmental pressures [5]. Parallel investigations delve into the specific physiological responses and overall water use efficiency of various fruit trees when cultivated under different irrigation regimes. This provides granular, actionable insights into precisely how specific watering strategies directly impact not only growth and yield but also the overall water productivity within horticultural crops, offering practical guidance for cultivators [9].

Technological solutions, particularly those involving advanced irrigation methodologies, represent a significant and evolving focus for dramatically improving WUE across agricultural landscapes. A comprehensive global review systematically assesses the far-reaching impacts of various irrigation strategies on both crop water use efficiency and overall yield. By meticulously synthesizing findings from a wide array of diverse agricultural contexts across the globe, this research provides invaluable insights into optimizing current irrigation practices for robust, sustainable water management and enhanced global food production [6]. Further specializing this approach, recent and rapid advancements in micro-irrigation systems are meticulously reviewed for their pivotal and transformative role in modern agriculture. These sophisticated technologies enable remarkably precise water delivery, a feature that not only significantly minimizes water waste but also critically optimizes the allocation of scarce resources for an extensive range of crops, thereby representing a major leap forward in efficient agricultural water utilization [8].

On the genetic front, molecular breeding techniques are rapidly emerging as powerful and indispensable tools for future agricultural resilience. The current status and promising future directions of molecular breeding for significantly enhanced water use efficiency in crops are thoroughly discussed within this body of work. This discussion includes an in-depth exploration of cutting-edge genetic approaches specifically designed to substantially boost plant resilience and maximize productivity even under severe water-limited conditions. This collective research undeniably points towards innovative and truly sustainable agricultural solutions that will be vital for feeding a growing global population in the decades to come [7]. The overarching and unifying theme across these diverse but interconnected studies is the critical and undeniable need for a sophisticated, multi-pronged approach. Such an approach must skillfully integrate a deep genetic understanding, advanced agronomic practices, and precise technological applications to holistically secure agricultural productivity in an era increasingly defined by heightened water scarcity.

Conclusion

This collection of research underscores a critical global imperative: enhancing water use efficiency (WUE) in agriculture, a necessity driven by the twin pressures of climate change and escalating water scarcity. The studies comprehensively explore diverse strategies, beginning with an in-depth understanding of the intricate physiological and molecular mechanisms plants employ to develop drought resilience. This includes detailed investigations into aspects like stomatal regulation, optimized root architecture, and the manipulation of specific molecular pathways, all of which inform advanced genetic improvements and molecular breeding techniques for developing more robust crops [1, 7]. The research also adeptly addresses significant regional and crop-specific challenges. There is a clear focus on implementing effective strategies in arid and semi-arid regions, as well as tailoring approaches for key agricultural commodities such as cereal crops, various fruit trees, and broader horticultural produce [2, 3, 4, 9, 10]. A substantial portion of the work is dedicated to optimizing irrigation practices. This ranges from global assessments of the impacts of various irrigation strategies on crop WUE and yield to detailed examinations of advancements in precision and micro-irrigation systems. These technological innovations are shown to be crucial for minimizing water waste and maximizing efficient water delivery across diverse agricultural settings [6, 8]. Furthermore, the research delves into complex environmental interactions, notably a meta-analysis quantifying the combined effects of elevated Carbon Dioxide (CO2) levels and drought stress on crop water-use efficiency [5]. Collectively, these studies powerfully advocate for and demonstrate the efficacy of integrated, multi-pronged approaches—skillfully combining advanced agronomy, cutting-edge genetics, and precise technological applications—to foster sustainable agricultural systems capable of thriving under limited water resources and ensuring global food security.

References

1. Shubham S, Aman S, Vishal K (2021) Environ Exp Bot 188 104473.

   , ,

2. H. MA, M. TA, K. AA (2022) Saudi J Biol Sci 29 197-206.

   , ,

3. Rahul K, Pawan S, Amit K (2023) J Environ Manage 334 118776.

   , ,

4. Huijuan S, Xiaohui W, Yan L (2022) Front Plant Sci 13 909063.

   , ,

5. Jianhua W, Jinsong L, Guohong L (2020) Global Change Biol 26 3871-3887.

   , ,

6. Yuqi L, Shengjie R, Hongjun L (2021) Agric Water Manage 255 106880.

   , ,

7. Deepa S, Anil K, Rakesh K (2023) Planta 258 104.

   , ,

8. Nitesh P, Sanjay K, Vinod S (2024) Irrig Sci 42 235-250.

   , ,

9. Lihua C, Yuqi L, Qing Z (2021) Sci Hortic 284 110515.

   , ,

10. B. G, A. HK, V. PS (2020) Field Crops Res 255 107871.

    , ,