Modern biological studies have shown that roots are not only the absorption organs of water nutrients, but also the chemical signals generated by the nutrient status of the soil, and transmit these signals to the aerial parts, thereby controlling the physiological activities of the above-ground organs, such as stomatal opening. Closure, leaf expansion, fruit development, etc. Therefore, establishing and maintaining a healthy root system is very important for the normal development of shoots, leaves and fruits. Although conventional fertilization measures can provide nutrients to plants, only the root system knows what nutrients are needed, how much is needed, when it is needed, and actively assists them. Therefore, promoting root development is the basis for efficient cultivation.
There are three main factors affecting root development:
1. Soil physical factors: Soil moisture, air, temperature, and aggregate structure are all physical factors affecting root growth. For example, soil temperature is a key factor in the growth of winter crops. When the temperature is too low, if the weather is cold and rainy, the physiological activities of the roots will be weakened, and frostbite and death will occur severely.
2. Soil nutrients: The roots are fertile, so under fertile soil or fertilization conditions, the roots are developed, with more capillary roots and longer activity time. Organic fertilizer, NPK, calcium, magnesium, boron and manganese can promote root growth.
3. Soil pH: In acidic soil, heavy metal elements and their organic complexes have an inhibitory effect on roots; too high soil pH will directly inhibit root growth.
Understand the main factors affecting the growth of crop roots, then how to take the right medicine and take effective measures to establish and maintain a healthy environment for crop root growth?
(1) Improved soil: especially in economic crop production areas, due to years of heavy and unscientific water and fertilizer management, soil compaction, soil acidification, and soil salinization are serious, causing serious damage to root growth. By deep-turning the soil, adding organic fertilizer, supplementing beneficial microorganisms, rationally applying soil amendments according to soil acid-base conditions, improving soil structure, improving soil physical and chemical properties, and providing soil conditions with good permeability and buffer capacity for root growth.
(2) Reasonable fertilization: avoid excessive fertilization of large water and large fertilizers, pay attention to the reasonable combination of a large number of elements and medium and trace element fertilizers, such as nitrogen, phosphorus, potassium, calcium, magnesium, boron and manganese to promote root growth. Note that the combination of microbial agents can not only improve the rhizosphere soil, but also promote the growth of roots. At the same time, it can form a beneficial bacteria protection circle in the rhizosphere to prevent the occurrence of crop diseases.
(3) Scientific use of rooting and strong seedling products: low temperature in winter and weak root activity, roots must be combined with rooting products, which have good rooting and rooting effects, and can significantly improve the cold resistance and resistance of crops. Reverse ability.
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