Why are agricultural soil sensors becoming more and more important in agricultural planting?
Soil is the main material basis for plants to survive. It can provide crops with the necessary water, fertilizer, heat, and air for their growth. This is mainly because the composition of soil includes organic matter, minerals, soil air and soil moisture, microorganisms, etc. , Minerals are the most basic substances, which can provide a variety of nutrients to plants. Organic matter can not only provide nutrients to plants, but also play an important role in improving soil aggregate structure and physical and chemical properties, as well as water supply, water retention, temperature stabilization, and ventilation.
With the continuous progress of society and the rapid development of science and technology, scientific soil testing and scientific fertilization have become a method recommended by large-scale agricultural planting. For soil testing, it is not just that it can detect the nutrients of the soil. There are many element indicators. Different soil testing instruments can be used to detect the soil indicators, so as to provide scientific information support for agricultural planting and production. The specific parameters that need to be monitored are: Which ones? What does it do?
1. Monitoring of soil moisture
If soil moisture is less, which will directly (decrease photosynthetic raw materials) or indirectly (stomatal closure, enzyme inactivation, etc.) affect the decline of photosynthesis, becoming the most important limitation of photosynthesis. Lacking of water can also cause the death of crops, because the total volume of the soil gap is constant, and water and air occupy this part of the volume. Then when the water content is too low, the plant roots will not absorb enough water, and the plant's transpiration will cause the plant to lose a lot of water, which will cause the plant to lose wilt. When the soil lacks water, it will cause soil compaction and cracks. The pulling force of the plant will break the root system of the plant, and cause the plant to die in severe cases. When there is too much water, the proportion of air is small, resulting in weakening of aerobic respiration of plant roots, and plant roots are forced to turn to anaerobic respiration. Anaerobic respiration produces alcohol poisoning plant roots, causing root rot, and in severe cases, plant death.
To monitor soil moisture, a soil moisture sensor can be used to determine whether to irrigate or whether to stop irrigation in real time based on information got from soil moisture sensor to ensure that the soil moisture is suitable for crop growth.
2. Monitoring of soil temperature
A suitable soil temperature is conducive to the growth of plants, and a temperature that is too low or too high is not conducive to the growth of plants. Crop seeds must germinate within a suitable soil temperature range. Within a certain temperature range, the higher the soil temperature, the faster the growth and development of the crop, and the growth of different plants has different requirements for temperature.
If a soil temperature monitor is used to monitor the soil temperature to keep the soil temperature within a suitable growth temperature range for crops, which can ensure crop yields or further increase production and income.
3. Monitoring of soil pH
The growth of various plants has its own suitable soil acidity, and most plants are difficult to grow normally when the pH value is too high or too low. Some diseases only occur within a certain range of acid-base pH value. For example, damping-off disease often occurs on alkaline and neutral soils. Suitable soil acidity and alkalinity help the growth of agricultural products and reduce pests and diseases, so the monitoring of soil acidity and alkalinity is very necessary.
4. Monitoring of soil nitrogen and potassium
Nitrogen is the main component of protein, plays an important role in the growth of stems and leaves and the development of fruits, and is the nutrient element most closely related to yield. Before the first ear fruit rapidly expands, the plant's absorption of nitrogen gradually increases.
Burning fertilizer can promote the differentiation of tomato flower buds, early flowering and fruiting, promoting seedling root growth and improving fruit quality. In the absence of burn, the young shoots and roots grow slowly, the plants are short, the leaves are dark green, dull, and the back is purple.
Potassium can promote healthy plant stalks, improve fruit quality, enhance plant cold resistance, increase fruit sugar and vitamin C content, as in the case of nitrogen and smelt, potassium deficiency symptoms first appear in old leaves. When the potassium supply is insufficient, carbohydrate metabolism is disturbed, photosynthesis is inhibited, and respiration is strengthened. Therefore, when potassium is deficient, the plant's resistance to stress is weakened, and the plant is vulnerable to disease, the fruit quality is reduced, and the coloring is poor.
Based on the different needs of different crops, it is important to monitor different nutrient elements in the soil.
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