1. Cultivated weeding soil
Salvia miltiorrhiza grows slowly in the early stage, and weeding and weeding should be carried out in time. It is usually carried out 2-3 times before ridge sealing and combined with fertilization. The first time when returning green, the seedling height was 6 cm; the second time was conducted in June; the third time was conducted in July-August. After the ridges are closed, the branches and leaves of Danshen are lush and it is inconvenient to carry out cultivating and weeding. However, it is found that weeds must be removed in time to prevent weeds and plants from competing for water and affecting the growth of Salvia miltiorrhiza. In the period from June to July before the sealing of radices with Salvia miltiorrhiza, it should be combined with cultivator for rooting, insulation and moisturizing, so as to facilitate drainage between the rows and between the strains, and prevent water accumulation in the rainy season.
2, top dressing
Salvia miltiorrhiza is harvested after the spring begins, and it takes a long period of 9 months. During this period, Salvia miltiorrhiza grows vigorously, and the amount of fertilizer needed is significantly increased compared to the seedling stage. Sufficient nutrient supply can guarantee its robust growth. Therefore, during the growth period of Salvia miltiorrhiza, it is necessary to top-fertilize 2-3 times, and it can also be combined with cultivating and weeding. For the first time, when returning green, the seedling fertilizer was mainly used for nitrogen fertilizer, and 400 kilos of cooked manure urine was poured per acre, or 5 kg of urea or 10 kg of ammonium sulfate was applied. The second time, from the middle of April to the beginning of May, the plots that left no seeds could be applied after the inflorescence was cut. Each person had a 500 kilograms of manure and urine per acre, and 50 kilograms of cake. In the 3rd time, after the old pole was cut in June and July, a long root fertilizer should be applied. It should be reused, and 3,000 kg of manure, 20 kg of superphosphate, and 10 kg of potassium chloride should be used per acre. The fertilization method can be applied to the ditch or acupuncture, and the cover soil can be covered with fertilizer after the application to increase the fertilizer efficiency.
3, water management
Danshen avoid water, in the rainy season, pay special attention to drainage and flood control, so as not to rot. Salvia has a large amount of water during the flowering period, and water shortage during this period will seriously affect plant growth. Therefore, in case of drought, it is necessary to water in time to ensure the supply of water. Irrigation methods include furrow irrigation, flood irrigation and sprinkler irrigation. Furrow irrigation is a more practical and good method. In the case of Daejeon's seeding, the ditching between the rows and irrigating Danshui soils serve two purposes. When water is poured, the water in the ditch is drained and penetrates into the root of Salvia miltiorrhiza. This even irrigation can avoid compaction. Before the planting, the plots that have been well-prepared can be used for irrigation. The unevenly-ground fields can be appropriately shortened according to the irrigation conditions to prevent flooding and flooding, and water can damage Salvia miltiorrhiza. It is an advanced irrigation technology that can reduce the amount of water, reduce field work, and prevent surface compaction.
4, picking buds
This is an important cultivation measure for the production of Salvia miltiorrhiza. In addition to planting plants, the calyx should be removed in a timely manner at the bud stage to ensure that the nutrients are concentrated in the roots. It is best to remove it by hand when the inflorescence is just 1-2 cm. The time should be sooner rather than later. If you pick up too late and the flower bud grows old and long, you need to use scissors to cut it off at the base of the inflorescence. It is best to start from mid-April and pick or cut every 10 days. When taking buds, care should be taken to protect the plants, not to damage the stems and leaves, and not to be carried out in rain or dew, so as not to cause wound infection.
After the seeds are harvested, the stems and leaves of plants are gradually senescent or withered, which is detrimental to root growth. Cutting the old stalks will allow the basal leaves to grow back and promote root growth. The cut-off time should be selected from the summer to the summer.
5, disease prevention and pest control
The pests and diseases in this period are more serious and can be summarized as follows:
(1) Prevention and treatment of root rot of Salvia miltiorrhiza: selection of disease-resistant varieties; strengthening of field management, application of organic fertilizer, application of phosphorus and potassium fertilizers to make plants grow robustly, improve plant disease resistance, and prevent waterlogging in low-lying areas; Drainage; at the beginning of the disease, 50% carbendazim WP 1000-fold solution or 50% dexamethasone 500-800 times solution, or 30% phenanthrene quinone 500-800 times solution, every 10-15 days 1 Times, 2-3 times in a row.
(2) Prevention and treatment of root knot nematode disease of Salvia miltiorrhiza: When the high temperature reaches 45°C, the soil moisture content of 20% or less can kill or inhibit its growth.
(3) Control method of Spodoptera exigua: black light lamp is used to trap adult insects or artificially kill larvae; larvae use 90% trichlorfon 1000-1500 times solution or 50% phoxim EC 1500-2000 times solution in 1-3 instar stage. Spray, spray once every 5-7 days, even spray 2-3 times.
Containerized Oxygen Generator
ETR can combine all parts of the oxygen generation system into a customized container, including air compressor, refrigerate air dryer, filters, buffer tanks and Oxygen Generator. Even the optional oxygen booster and cylinder filling station.
Compressed air is purified through the air dryer and filters to a certain level for main plant to work with. Air buffer is incorporated for smooth supply of compressed air thus to reduce fluctuation of compressed air source. The plant produces oxygen with PSA (pressure swing adsorption) technology, which is a time proven oxygen generation method. Oxygen of desired purity at 93%±3% is delivered to oxygen buffer tank for smooth supply of product gas. Oxygen in buffer tank is maintained at 4bar pressure.
Containerized Oxygen Generator
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