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相关概念视频

What is Climate?01:16

What is Climate?

18.4K
Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
18.4K
Responses to Drought and Flooding02:41

Responses to Drought and Flooding

10.6K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
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Adaptations that Reduce Water Loss01:57

Adaptations that Reduce Water Loss

25.2K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.2K
Responses to Salt Stress02:02

Responses to Salt Stress

13.1K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
13.1K
Key Elements for Plant Nutrition02:35

Key Elements for Plant Nutrition

18.7K
Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
18.7K
Responses to Heat and Cold Stress02:45

Responses to Heat and Cold Stress

13.4K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.4K

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相关实验视频

Updated: Jun 15, 2025

Author Spotlight: Unraveling Plant Responses to Abiotic Stresses Using the PlantScreen Robotic Platform
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Author Spotlight: Unraveling Plant Responses to Abiotic Stresses Using the PlantScreen Robotic Platform

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考虑降雨量变化的粮食安全问题研究.

SiMan Jiang1, Shuyue Chen2, Qiqi Xiao2

  • 1School of Marxism of Fujian Police College, Fuzhou, Fujian, 350007, People's Republic of China.

Scientific reports
|August 24, 2024
PubMed
概括
此摘要是机器生成的。

中国中国中国中国.

关键词:
二阶段的DDF是DDF的两个阶段.粮食安全 粮食安全改善营养 改善营养

更多相关视频

Semi-High Throughput Screening for Potential Drought-tolerance in Lettuce Lactuca sativa Germplasm Collections
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Semi-High Throughput Screening for Potential Drought-tolerance in Lettuce Lactuca sativa Germplasm Collections

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A Protocol for Conducting Rainfall Simulation to Study Soil Runoff
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A Protocol for Conducting Rainfall Simulation to Study Soil Runoff

Published on: April 3, 2014

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06:28

Author Spotlight: Unraveling Plant Responses to Abiotic Stresses Using the PlantScreen Robotic Platform

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Semi-High Throughput Screening for Potential Drought-tolerance in Lettuce Lactuca sativa Germplasm Collections
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Semi-High Throughput Screening for Potential Drought-tolerance in Lettuce Lactuca sativa Germplasm Collections

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A Protocol for Conducting Rainfall Simulation to Study Soil Runoff
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A Protocol for Conducting Rainfall Simulation to Study Soil Runoff

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科学领域:

  • 农业经济学 农业经济学
  • 公共卫生 公共卫生
  • 食品安全研究 食品安全研究

背景情况:

  • 粮食安全对于全球经济发展和社会稳定至关重要.
  • 中国的农业部门在确保足够的粮食供应和营养方面面临着挑战.
  • 衡量消除饥饿和改善营养方面的进展至关重要.

研究的目的:

  • 测量中国消除饥饿,粮食安全和营养改善的效率.
  • 分析降雨作为外部变量对这些效率的影响.
  • 确定中国粮食安全努力中的区域差异和特定阶段需求.

主要方法:

  • 利用来自中国29个省份 (2016-2020) 的面板数据.
  • 在外源数据包围分析 (DEA) 模型下使用了元透两阶段动态定向距离函数 (DDF).
  • 选择的指标包括食源性疾病和缺疾病,儿童发育迟缓,营养不良,肥胖率和新生儿访问率.

主要成果:

  • 目前,中国农业经济的可持续性还不够.
  • 消除饥饿,粮食安全和营养改善的平均效率在东部,西部和中部地区呈现下降趋势.
  • 这些措施的有效性在不同发展阶段有所不同.

结论:

  • 对农业基础设施的持续投资是必要的.
  • 建议增加对绿色农业生产的政策支持.
  • 促进农业生产多样化和农产品的多样化消费可以提高粮食安全.