Wheat fertilization "four look and four set"

A look at the fertility basis of the wheat field, set fertilization varieties. Where the level of soil fertility in wheat is higher, if a sufficient amount of organic fertilizer is applied before sowing, or if soil fertilization and fertilizer application are conducted, spring shall be applied with little or no nitrogen fertilizer and only phosphorus and potassium fertilizers shall be used. Where fertility of the soil is poor, fertilization due to rain will affect fertilization before sowing, resulting in a shortage of wheat in the field should be given more nitrogen fertilizer, combined with the application of phosphorus and potassium fertilizers. Fully meet the fertility requirements of wheat heading and heading. Second, look at the development stage of wheat seedlings and set the fertilization time. According to the growth and development stage of wheat in the Yellow River Basin, it is generally the best time to apply joint fertilizer in late February to early March. At this time, fertilization can promote the formation of large pods and improve the rate of success. Promote the differentiation of spikelets and florets, and strive for more grains and spikes. At the same time promote the growth of the top three leaves. Therefore, fertilization at this stage is the maximum effect period of winter wheat fertilization. At this stage, the first internode length of the main stem of the wheat plant is already stable, and the second internode is elongating. After fertilization, it will not cause too long stretching between the base internodes, weakening the lodging resistance of wheat, and only promoting the healthy growth of wheat. Facilitate the jointing of heading and increase the number of mu ears. Three to see the growth of wheat seedlings, determine the amount of fertilizer. According to the growing trend of wheat seedlings in spring, determine a reasonable amount of fertilizer. Where wheat young leaves with green leaves, drape, no defertilizer, large populations of wheat, generally do not apply nitrogen fertilizer or less nitrogen fertilizer, can topdressing phosphorus, potassium fertilizer 10-12 kg; where poor soil fertility, affected by the rain Delayed sowing, poor seedling growth, low yield per plant, small number of wheat fields, should be topdressing 6-8 kg of urea per mu, or 15-18 kg of ammonium bicarbonate, combined with topdressing of superphosphate and chlorination 5-6 kg of potassium, or 1000-2000 kg of biogas fertilizer per acre. Promote the rapid growth of wheat seedlings and improve the rate of tillering and spike formation. Fourth, look at the climate and soil business conditions, and set fertilization methods. One is to select the fine weather at noon for topdressing; the second is that wheat fields with irrigated conditions can be used immediately after the application of fertilizer to water, and can also be applied with water; third, the fields with no irrigation conditions must be applied deep into the field. The depth of fertilization should reach 5-8 cm or more. Immediately after application, buckwheat should be used to prevent the volatilization of fertilizer efficiency and increase the utilization rate of fertilizer. Fourth, it is possible to withdraw fertilizer directly into the wheat field before raining; Can be applied with water, dry land can be directly poured McDull, then covered with a little cover; six is ​​forced outside the roots, in the jointing stage spraying 0.2% -0.3% of potassium dihydrogen phosphate solution, the amount of spray per acre 40-50 kg.

Intramedullary Nail

Intramedullary nails are orthopedic internal fixation devices in medical devices. Intramedullary nails consists of main nail,locking screws,cannulated locking screws,blade screws,lag screws and end cap.

The proximal end of the main nail is provided with a proximal locking screw holes, and the surface of the intramedullary nail is provided with more than one long decompression plane, which can be from the proximal end of the intramedullary nail to the distal end.It is one of the most important orthopedic implants.

Intramedullary Nail,Interlocking Nail,Tibia Intramedullary Nail,Femoral Nail

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