In general, the growth and development of crop roots is shallow and deep, from near to far, and the ability to absorb nutrients is weakened and weakened. Therefore, the fertilization method should be carried out according to this law. The application of the base fertilizer combined with seed fertilizer and topdressing in the practice of fertilization not only meets the nutrient requirements of different growth stages of the crop, but also adapts to the laws of root growth and development.
The depth of roots of different crops is different. Most of the dicotyledonous crops such as cotton, soybean, alfalfa and other straight root crops have deeper root depth than monocotyledonous crops such as gramineous root crops. Deep root crops should be deeper than shallow root crops. Because the root system absorbs nutrients, the seedling stage is weak, the medium-term is strong, and the later stage is weakened. Therefore, the water-soluble fertilizer should be used as the seed fertilizer and the surface fertilizer in the seedling stage, and the water-soluble fertilizer can be used for the foliar spraying in the later stage.
The depth of distribution of plant roots indicates that plants absorb nutrients not only from the topsoil but also from the subsoil. Root density refers to the total length of the roots in a unit of soil volume. It indicates how much soil volume supplies nutrients to the roots. The high density of roots indicates that the effective space for supplying nutrients is large. Different crop roots have different ability to absorb insoluble phosphorus. For example, radish, rapeseed, buckwheat and other crops have strong ability to absorb insoluble phosphorus, and gramineous crops have weak ability to absorb insoluble phosphorus.
In summary, crop fertilization should be principled, can not be blindly fertilized, can not be violated theoretical fertilization, use different fertilization methods and links, so that crops can more effectively absorb nutrients and promote increased production.
Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
what is natural food color?
Natural food coloring refers to pigments extracted or prepared from plants, animals, microorganisms or other natural sources for coloring food. These pigments are naturally produced due to biochemical reactions in living organisms and do not contain synthetic chemical components.
Natural food colors can be divided into the following categories according to their source:
1. Plant pigments: This is the most common source of natural food pigments, including pigments derived from a variety of fruits, vegetables, flowers, and plant roots. For example, red beets can provide red pigments, carrots can provide orange pigments, turmeric can provide yellow pigments, and blueberries and purple potatoes can provide purple and blue pigments.
2. Animal pigments: These pigments are rare and usually come from the tissues or excretions of certain animals. For example, cochineal is a red pigment derived from the cochineal insects that live on certain cacti.
3. Microbial pigments: Some microorganisms, such as monascus, can produce specific pigments, such as monascus red pigments.
4. Mineral pigments: Although less used, certain inorganic minerals can also be used as natural food pigments, such as titanium dioxide (white) and iron oxide (red, yellow and black). However, due to possible toxicity issues with some mineral pigments, their use is often severely restricted or banned.
Natural food colors are generally considered safer and healthier than synthetic colors due to their nature. However, their color stability, heat resistance, light resistance, and interaction with other food ingredients may not be as good as synthetic pigments, so their application in the food industry sometimes presents some challenges. At the same time, the extraction and processing of natural pigments can also affect their cost and sustainability. Nevertheless, as consumer concerns about food safety and health increase, the demand for natural food coloring is growing.
Natural Food Colorants,Natural Food Pigments, natural food color
Xi'an Day Natural Inc. , https://www.dayqc.com