Rotation is the best way to prevent continuous obstacles

In recent years, the occurrence of soil continuous cropping obstacles has become more and more serious. A variety of nematode diseases, blight, and stem blight cause more and more pesticides, forming a vicious circle. The soil that continuously grows the same or closely related crops is called Old Soil or Sick Soil or Soil Sickness, which is often referred to as “heavy sputum”; in Japanese, it is called stagnation, suspicion, and disgusting. Continuous cropping of the soil often produces a variety of diseases that lead to continuous cropping obstacles. Linyi Fertilizer Network Copyright

The mechanism of continuous cropping of Linyi fertilizer Copyright

Continuous Cropping Barrier refers to the phenomenon of growth and poor quality yield due to continuous planting of certain (or even the same) crops, commonly known as “heavy disease”. Continuous cropping obstacles must arise from continuous cropping soil, but continuous cropping does not necessarily lead to continuous cropping obstacles. The main cause of continuous cropping obstacles is that many families of vegetables are close to each other, and there are some common diseases, and the spread of germs. The plant factor causing the continuous cropping disorder is the allelopathic effect of plants, that is, the chemistry of a plant or microorganism (donor) releasing certain chemicals into the environment and affecting the growth and development of other organisms including plants, animals, microorganisms (receptors). Ecological phenomena, including promotion and inhibition. The inhibitory phenomenon produced when the receptor and the donor belong to the same plant is called the autotoxicity of the plant. Allelochemicals are mainly secondary metabolites produced by plants in the acetic acid pathway or the shikimate pathway. The mechanism of action of allelochemicals is to inhibit cell division, elongation, damage to cell walls, and changes in cell structure and submicroscopic structure. It affects the levels of auxin, gibberellin and abscisic acid in crops; destroys cell structure, changes the function and activity of enzymes, inhibits the transport of amino acids and the integration of amino acids into proteins, and hinders the conduction of pores. The allelochemicals can be classified into 14 types, such as organic acids, linear alcohols, tannins, alkaloids, anthraquinones, phenols, and terpenoids. Linyi Fertilizer Network Copyright

The cause of the continuous cropping obstacle is the high multiple cropping index and high yield. The close relatives planted continuously and repeatedly planted, and each crop has some special pests and weeds. The continuous cropping can cause these diseases and insects to be infected in a vicious cycle, such as downy mildew, root rot, and mites. Tomato virus disease, late blight, pepper bacterial wilt, blight and so on. The diseased plant residues of vegetables and the diseased bacteria in the soil are not easy to remove, and the soil layer is shallower and shallower, causing the bottom of the plow to rise; the continuous irrigation causes the dry-wet alternation to be inconspicuous, and some aerobic microbial growth is inhibited; Diseases occur frequently, and a large number of pesticides are applied, so that some germs and pests enhance drug resistance; due to improper fertilization, the nutrients in the soil are not balanced, especially those that have not been fully decomposed to cause contamination of the bacteria. Linyi Fertilizer Network Copyright

The main role of rotation of Linyi fertilizer Copyright

Rotation is a method of planting different crops or multiple combinations in the same field in the same season and between years. Rotation is the best way to prevent continuous cropping, and it is a biological measure combining land and land. Rotation is beneficial to the balanced use of soil nutrients and disease, insect and grass damage; it can effectively improve the physical and chemical properties of soil and regulate soil fertility; rotation can balance the use of nutrients in the soil, combining land and land; rotation can be changed Farmland ecological conditions, improve soil physical and chemical properties; rotation can increase biodiversity, avoid and reduce the harm of certain crops and pests. Using the sterilizing hormone secreted from the roots of the former crops, it can inhibit the occurrence of diseases on the crops. For example, root mashes such as sugar beet, carrot, onion and garlic can inhibit the late blight of potato, and the secretion of wheat root can inhibit the thatch. Growing. Due to the deterioration of food conditions and the reduction of hosts, a large number of pests with strong parasitism, single host plant species and small migration ability have died. Pathogens that are not highly virulent, such as Phytophthora infestans, cannot continue to multiply because they do not have host plants. Crop rotation with different nutrients can balance the nutrients of the soil. Rotation between crops with different diseases can alleviate the spread of certain crop diseases. Rotation can promote the activity of microorganisms in the soil that are resistant to pathogens, thereby inhibiting the growth of pathogens. Linyi Fertilizer Network Copyright

Rotation does not affect the cultivation of benefits Linyi fertilizer Copyright

China has a long history of crop rotation. Most of the dry land is dominated by cereal crops or cereal crops, cash crops and beans, green manure crop rotation; paddy rice and dry crop rotation; rotation between various vegetables; rotary planting of deep roots and shallow roots, In order to absorb the nutrients in the soil at different depths, the nutrients in the upper and lower layers of the soil are balanced, such as tomato-cabbage, which has a long growing period and a deep root distribution, while the distribution of short roots in Chinese cabbage is shallow; Alternate planting of small fertilizers can alleviate the pressure of soil fertility, such as: broccoli and green beans; vegetable rotation with high land cover and low coverage, which can protect the soil structure. Linyi Fertilizer Network Copyright

Some people worry that the rotation will affect the income of farmers, but it is not. It takes 9 months to grow a tomato, grow long in a long period of time, earn a few tens of thousands a year in high income, but the investment is also big, and the risk is also great. If you plant a few rapeseed, parsley, and fennel in a row, the investment is small, and the management is labor-saving. The income is also a few thousand dollars, which adds up a lot, and it is of great benefit to the prevention and treatment of diseases. For the long-term benefit, we must vigorously publicize the merits of the rotation and encourage the rotation for the future. Linyi Fertilizer Network Copyright

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