Key points of high quality rice fertilization management technology
Rice fertilization is different from other crops. Generally speaking, organic fertilizer and phosphate fertilizer should be used as base fertilizer. Potassium fertilizer is mainly used as tiller fertilizer. Nitrogen fertilizer should be applied repeatedly. Pay special attention to applying strong and strong seed fertilizer. The following points should be noted. :
First, apply enough organic fertilizer. The addition of organic fertilizer is an important measure in the cultivation of high quality rice and is the basis for achieving high quality and high yield. Organic fertilizer is mainly used as the base fertilizer. Generally, 40-50 tons of succulent mature soil per acre is applied before ploughing, or 40-50 kg of cake fertilizer. In addition, 40-50 of human and animal manure can be applied as a noodle fertilizer before ploughing and watering to ensure the nutrient needs of the seedlings after they are transplanted.
Second, control the amount of nitrogen fertilizer. Excessive application of nitrogen fertilizer will not only cause ineffective tillering, greed, lodging, and intensification of pests and diseases, but also lead to more empty mites and lower seed setting rate, which will affect rice yield. Nitrogen fertilizer is mainly used as top dressing. Generally, 6-7 kg of urea per mu is applied after transplanting rice. The second time is 13-5 days after transplanting, and 4-5 kg ​​of urea per mu is combined with the cultivated field to benefit the hair. Hey. In the medium term, attention should be paid to water control and fertilizer control. Only the second and third types of seedlings with poor growth should be used to supplement some balanced fertilizers. In the later stage, the seedlings should be supplemented with 3-5 kg ​​of grain fertilizer.
Third, increase the application of phosphorus and potassium fertilizer. Phosphate fertilizer is suitable for base fertilizer, and potassium fertilizer is better for topdressing. Generally, 20 kg of phosphate fertilizer per acre is applied to the field with sufficient organic fertilizer, and the potassium fertilizer used as the split fertilizer can be applied with 3.5-5 kg ​​of potassium sulfate per mu. Spraying potassium dihydrogen phosphate in the late stage of rice can promote the grouting and firming. Generally, it is sprayed once in the late stage of flowering and the filling stage. 150 g of potassium dihydrogen phosphate per acre and 50-60 kg of water are sprayed in the evening.
Fourth, the foliage is supplemented with micro-fertilizer. Trace elements such as zinc, manganese and boron can improve the supply of oxygen in rice roots, enhance the resistance of rice plants, improve the disease resistance of plants, promote the development of roots in the later stage, prolong the functional period of leaves, prevent premature aging, and accelerate the development of flowers. Increase the amount of pollen, promote the pollen germination, and help to increase the rate of rice emergence; it can also promote the large number of spikes, increase the seed setting rate and the grain filling degree, thereby increasing rice yield. According to the test, in the case of the same cultivation and management measures, the application of trace element fertilizer can increase the yield by 40-50 kg per mu, and the application of trace elements such as zinc, manganese and boron in rice is generally carried out twice. The first time in the peak period, the second time in the completion of the young spike differentiation. The application rates of zinc, manganese and boron fertilizers are 100-125 grams per mu, and the spraying concentration is: one thousandth of zinc; manganese and boron are each five ten thousandths. The application of foliar fertilizer requires a cloudy or sunny afternoon to be sprayed on the front and back of the blade.
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Roundness Measuring Instruments
Roundness meter is a length measuring tool for measuring roundness using the rotary axis method. The roundness meter is a measuring tool for measuring the roundness error of the workpiece using the rotary axis method. Roundness tester is divided into two types: sensor rotary type and workbench rotary type. During measurement, the measured part is installed concentrically with the precision shaft system, and the precision shaft is attached with an inductive length sensor or a workbench for precise circular motion. It is composed of sensor, amplifier, filter and output device of the instrument. If the instrument is equipped with a computer, the computer is also included in the system.Roundness Tester
The principle of the roundness meter is the same as that of the coordinate measuring machine. In fact, its working principle is very simple. The coordinate measuring machine is a point acquisition tool. Its principle is to collect points first, and then form a line from points, and then form a three-dimensional model from lines. CMM is a kind of measuring equipment that has a guiding mechanism, a length measuring element, a digital display device in three mutually perpendicular directions, and a worktable that can place the workpiece (not necessarily large or huge). The measuring head can be moved to the measured point easily by manual or motorized means, and the coordinate value of the measured point is displayed by the reading device and the digital display device. Obviously, this is the simplest and most primitive measuring machine. With this measuring machine, the coordinate value of any point in the measured volume can be displayed through the reading device and digital display device.
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