将草原产量和营养状况与管理实践联系起来:朝着大规模的草原使用强度评估
Mathilde De Vroey1, Julien Radoux1, Arnaud Farinelle2
1Earth and Life Institute, Université catholique de Louvain, 2 Croix du Sud bte L7.05.16, 1348 Louvain-la-Neuve, Belgium.
概括
监测草原使用强度对于可持续农业至关重要. 本研究使用卫星数据来估计草原产量和含量,将它们与管理和环境因素联系起来.
科学领域:
- 农业科学 农业科学
- 遥感 遥感 遥感 遥感
- 生态生态学 生态生态学
背景情况:
- 将增加的粮食生产需求与草原生态保护之间的平衡是一个重大挑战.
- 有效监测草原使用强度对于制定可持续农业政策至关重要.
研究的目的:
- 使用卫星图像检索草原干物产量 (DM),度 (NC) 和树冠含量 (CNC).
- 为了将这些检索的参数与农业管理实践和农业气候条件相关联.
- 计算营养指数 (NNI) 来评估草原状态.
主要方法:
- 利用了Sentinel-2反射率和指数,在七个测试中应用渐进线性回归作为最佳方法.
- 校准了采用三个生长季节的现场测量的检索模型,并在一个独立的数据集上验证了它们.
- 综合采集模型,包括草地分类和割草检测,用于区域规模的植被状况和料产量评估.
主要成果:
- 实现了DM的9.5%,NC的15.6%,CNC的6.7%的正常化RMSE值.
- 成功计算了NNI来评估草原的营养状况.
- 管理实践和农业气候条件对草原生产力和大规模含量的持续影响.
结论:
- 基于卫星的草原DM,NC和CNC的检索是可行的和准确的.
- 开发的模型为监测草原状况和为可持续农业管理提供信息提供了有价值的工具.
- 了解管理,环境和草原生产率之间的相互作用是优化土地利用的关键.
更多相关视频
相关概念视频
Key Elements for Plant Nutrition
23.9K
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...
23.9K
Overview of Nitrogen Metabolism
10.9K
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
10.9K
Inorganic Nitrogen Assimilation
428
Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme...
428
The Roles of Bacteria and Fungi in Plant Nutrition
46.5K
Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
46.5K
The Nitrogen Cycle
59.3K
Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
59.3K


