In recent years, due to the expansion of the city and the occupation of new development areas, many old vegetable fields in the suburbs have been occupied, and some grain fields in the outer suburbs have been changed to vegetable fields. In these new vegetable lands in the outer suburbs, there are shallow soil layers, poor permeability, difficulty in cultivation, low soil organic matter content, low soil quality, lack of nutrients, and lack of irrigation and drainage. Therefore, it is necessary to speed up fertilization in order to ensure soil nutrient balance. Accelerate soil maturation and create good soil conditions for high yields of vegetables. The method of fertilizing fertilizer is as follows: The grain quality of the grain fields in the deep suburbs is generally poor. The farming layer is only about 15 centimeters in size and is changed to vegetable soil. Since the number of planting ridges increases and the nutrient consumption is large, the cultivating layer should be deepened gradually to improve its physical properties. Deep plowing time can be arranged in the summer and autumn when the vegetables are out of the garden, each deep-dip twice, so that the tillage layer of 25 cm to 40 cm. To increase organic fertilizers to improve soil structure, there must be materials that can stabilize the structure, such as modifiers, urban organic waste, and organic fertilizers. The application of organic fertilizer can not only supply the needs of vegetables for nitrogen, phosphorus and potassium, but also promote the formation of soil aggregate structure, improve the ability to retain water and fertilizer, and increase the buffer capacity of soil. It is a material guarantee for fertilizing new vegetable fields and should be highly valued. Planting green legume legumes of legume green legumes fix nitrogen in the atmosphere. After picking up the edible parts of the beans, the returning of the crops to the field, especially the fresh stems and leaves of peas, broad beans, etc., can increase soil organic matter and nitrogen content. Rational crop rotation of vegetables will lead to soil acidification, salinization and disease spread. In the grain reform area, special emphasis should be placed on rational rotation, making use of differences in the absorption of different varieties of vegetables, slowing down the excessive consumption of certain nutrients, and avoiding or alleviating the above-mentioned problems, so as to give full play to the potential of new vegetable fields. If some mustard, peas, etc. are arranged in the rotation, they can absorb phosphorus and potassium which cannot be used by ordinary vegetables, and 14% to 34% are re-used in the soil in the available state to improve the phosphorus and potassium for the lower quail vegetables. Nutritional status. There are a variety of rotations, but one-quarter legumes should be arranged in the rotation. In addition, according to the specific conditions of each piece of land, it is necessary to take appropriate measures for the treatment of “diseaseâ€. For example, for a low-lying land that often encounters internal hail, the problem of too much must be solved: For acidic soils, calcareous fertilizer must be applied. Fertilizing new vegetable fields is a long-term task, not a short-term one. As long as various measures are properly implemented, the effect is very obvious. Localities can conduct fertilization according to local conditions. (Li Dezhi)
To cause a temporary loss of sensation with medicine or acupuncture.
Figurative use of some means to make people vague, depressed
Professional Anesthesia manufacturer is located in China, including Full Anesthesia,
Local Anesthesia,General Anesthesia, etc.
Anesthesia Anesthesia,Full Anesthesia,Local Anesthesia,General Anesthesia Zhejiang Hisern Medical Device Co., Ltd , https://www.hisernmedical.com