Agricultural Weather Stations / Ag Weather Station
An agriculture weather station is a meteorological monitoring instrument composed of various sensors, which is used in the field of agriculture.
Agricultural Weather Stations / Ag Weather Station
|Low temperature effect||High temperature hazard|
|● Cool damage|
Cool damage means that during the growing season of crops, the temperature is 0°C.
Above, sometimes even crops at about 20°C Hazard.
● Cold damage
Cold damage refers to crops in tropical and subtropical regions of China.
Winter temperatures above 0°C (sometimes slightly below 0°C)
Frost refers to the short-time low-temperature frost damage that occurs when the temperature of the soil surface or plant surface drops below the freezing point of the plant tissue in the warm season and freezes in the body tissue.
● Freeze damage
Freezing damage refers to a kind of agrometeorological disaster caused by low temperature below 0°C or severe temperature change during overwintering of overwintering crops and fruit trees.
|● Impaired photosynthesis, increased respiration, and reduced net assimilation.|
● Accelerate transpiration and disrupt the water balance in the crop.
● The high temperature hazards encountered during the flowering period of crops will reduce the flowering rate, pollen germination, and the cracking of anthers. The final result is the reduction of seed setting rate.
● When crops encounter high-temperature hazards during grain filling, they will cause premature root failure and decline in leaf function, shorten the grain filling period, and seriously affect the increase in grain weight.
● High temperature directly burns agricultural organisms.
|Hypohydration Hazards||Excessive Water Hazard|
Drought refers to long-term precipitation, resulting in air drying
The lack of water in the soil causes the water in the crops to be deficient and affected.
A crop that grows and develops normally, reduces yield, and even dies
● Dry hot wind
Dry hot air is a kind of agricultural disaster weather that affects wheat in the warm season with high temperature, low humidity and a certain wind force.
|● Flood disaster|
It refers to outbreaks of flash floods caused by heavy rain and heavy rain.
River flooding, flooding large fields of farmland, destroying agriculture
● Waterlogging harm
Waterlogging is caused by excessive or excessive rainfall, or
Poor farmland drainage, resulting in farmland water accumulation, so that dry field crops victimized.
● Wet damage
Wetness is caused by prolonged rain or excessive rain.Or poor drainage of farmland after floods and floods, so that soil moisture long-term saturation, resulting in poor air permeability, temperature too low to damage crop roots and cause crop growth development is blocked or died.
|1. Regulation of winds on the microclimate of farmland|
Wind will affect farmland turbulent exchange intensity, increase the exchange of heat and moisture between the ground and the air, increase soil evaporation and crop transpiration, and also increase the exchange of CO2 and other components in the air, so that the air inside the crop groups is continuously updated, temperature, water vapor, CO2, etc. play an important role in the regulation.
|1. Harm of winds to crops|
Wind power above level 6 can harm crops. Winds with a wind speed of >17m/S (Grade 8 or above) are called strong winds, and they are harmful to agriculture. The strong wind accelerates the transpiration of the plant, causing excessive water consumption, resulting in closed stomata and reduced photosynthetic intensity.
|2. Wind and Photosynthesis|
At low wind speeds, the boundary layer of the blade becomes thinner, the CO2 diffusion resistance decreases, which is beneficial to the transport of CO2, and photosynthetically active radiation can be reasonably distributed to the leaf layer in the form of a flash, thereby increasing the intensity of photosynthesis and improving light. Energy efficiency.
|2. Wind energy aggravates drought and causes soil erosion|
If windy weather occurs in arid regions and dry seasons, not only the consumption of soil moisture increases but also the drought conditions will increase. Gale will also blow away a lot of topsoil and cause wind erosion.
|3. Influence of wind on pollen and seed spread|
Many plants in the natural world are cross-pollinated and spread by the force of the wind. The size of the wind speed will affect the pollination efficiency and the seed propagation distance, thus exerting a great influence on the reproduction and distribution of plants.
|3. Wind energy spreads pests and diseases|
Wind energy spreads pathogens and causes the spread of crop diseases. According to studies, spores of wheat rust spread northwards in the spring and spread northwards into the cool regions, and fall into the winter warmer regions with the northerly airflow, causing damage.
1. Most plants are difficult to grow at pH>9.0 or <2.5. Plants can grow normally over a wide range, but all plants have their own suitable pH. Sour-acid plants: rhododendron, bilberry, camellia, cedar, pine, rubber tree, lithia; Hi-calcium plants: alfalfa, grass rhinoceros, southern sky, cypress, eucalyptus, eucalyptus, etc.; Saline-alkali plants: Tamarix, Elaeagnus, Poria, etc.
2. Plant pests and diseases are directly related to soil acidity and alkalinity:
1) Underground pests often require a range of pH environmental conditions, such as bamboo and earthworms and chafers and alkalis.
2) Some diseases only occur within a certain pH range. For example, damping-off often occurs in alkaline and neutral soils.
3) Soil activated aluminum: exchangeable aluminum adsorbed on soil colloids and aluminum ions in soil solution, it is an important ecological factor, which has a significant impact on the distribution, growth and succession of natural vegetation;
In strong acidic soils containing more aluminum, the plants that live in this type of soil are often resistant to aluminum or even aluminum (dendrobium, tea); but for some plants, such as clover, alfalfa, aluminum is toxic, The growth of aluminum in the soil is inhibited; research shows that aluminum poisoning is an important cause of land degradation of artificial forests.
1. Make the soil more compact.When the granule structure in the soil is reduced, the aeration and water permeability of the soil will be poor, and the soil will become sticky when it comes into contact with water. After the drying, there will be a large number of cracks on the surface. Roots stretch very slowly in such soils, and impervious and impermeable soils are more likely to cause root injury.
2. Inhibition of vegetable root development.Planting vegetables in salt-damaged soils generally shows short stature, poor development, and dense foliage. In severe cases, they start to dry or brown from the leaves, turning inwards or outwards, and the roots turn brown and die.