The urea ammonium nitrate solution is prepared from urea, ammonium nitrate and water. The three nitrogen sources are combined to exert the advantages of various nitrogen sources. Production practices have also proved that the effect of applying urea ammonium nitrate solution to plant potatoes is significantly better than that of urea alone.
Urea ammonium nitrate solution instead of urea, first of all to adjust the fertilization structure, basic fertilizer as deep as possible, in order to maintain a longer period of fertilizer efficiency, fertilizer to reduce the amount of fertilizer. General cultivation of potatoes needs topdressing about 20 kg of urea, the cost is about 30 yuan. After many years of experiment and demonstration, if the topdressing urea nitrate solution only needs about 5 kilograms, it can meet the potato growth needs, the cost is about 25 yuan, so the planting cost is calculated and increased. In the application of liquid fertilizer must pay attention to a small number of times, more early stage of potato growth to chase nitrogen fertilizer, after budding to reduce the amount of nitrogen fertilizer, increase the supply of potassium fertilizer, boron fertilizer and zinc fertilizer, to achieve nutrient balance, to avoid excessive growth after flowering, Underground section of "potatoes."
Pepper July management needs attention
Timely top dressing: In early July, it was the pepper coloring time. Just 10 days after the completion of the rain, it was possible to spray fertilizer on leaves and add a new high-fat film during spraying, which effectively improved the efficiency of fertilizer use. Stop topdressing nitrogen fertilizer to prevent the post-season madness. At the same time, basal fat should be applied as early as September to October, which will help improve the nutritional level of the tree.
Field management: timely cultivating and weeding in order to promote strong tree growth, pay attention to the timely discharge of water after the rain, to prevent the occurrence of root rot.
Plastic pruning: summer pruning is generally performed 2 or 3 times a year, mainly to remove excessively dense branches, overlapping branches, pests and branches, etc., in order to improve the ventilation and light conditions of pricklyash trees, improve photosynthesis, facilitate nutrient accumulation, and promote the formation of the coming year. Many knot peppers sticks. Trim the mouth to apply anti-corrosion film in time to protect the wound from healing quickly and isolate the bacteria.
Rhodium powder Rh≥99.95% Properties: silver-white metal, extremely hard, wear-resistant, also has considerable ductility Application: It can be used as raw material for electrical instrumentation, chemical industry and manufacture of precision alloys. Rhodium powder is based on the widespread use of ruthenium in the industrial industry. Since rhodium is a rare metal required by the industry, the industry price is slightly higher than that of general non-ferrous metals. Rhodium, one of the rare elements, has various uses. Rhodium can be used to make hydrogenation catalysts, thermocouples, platinum-rhodium alloys, etc. It is also often plated on searchlights and reflectors, and is also used as a polishing agent for gemstones. and electrical contact parts.
precious metal
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