In spring, the weather gets warmer, and wheat enters the growing season, especially the jointing and booting stage. It is the fastest growing period of wheat, the most growing amount, the most fertilizer and the most water-requiring period, which determines the number of spikes and the number of grains per spike. Critical period. Therefore, two things must be done in the spring management of wheat:
1. Do a good job in preventing and controlling diseases, pests and weeds in spring
For plots where there is no weeding before winter, we must seize the best time for the temperature rise in spring to prevent weeds and do a good job in weed control. According to different types of weeds, chemical weeding should choose high-efficiency, low-toxicity, and low-residue pesticides for comprehensive pest control.
Control method: the spring control of broad-leaved weeds is carried out before the jointing of wheat, generally in mid-to-late March, choose to spray in windless weather. The main control agent is tribenuron-methyl, and the wheat field is mainly sowing artemisia and shepherd's purse. Use 10-12 grams of tribenuron-methyl per mu and spray 30 kg of water evenly. For wheat fields with a lot of wheat stalks, pig seedlings, and sleyballs, a ********* compound preparation should be used, such as 40% quinsulfuron 2 g + 10% tribenuron-methyl 8 per mu 7-10 grams per mu or 36% Pentium per mu, spray 30-40 kilograms of water evenly. It should be reminded that it is not advisable to apply herbicides to wheat fields that have been jointed, and herbicides containing 2,4D butyl esters are prohibited in high-quality wheat fields.
Control of gramineous weeds: For wheat fields with brome as the dominant species, use 3 grams of 70% tiger per acre plus 10 grams of special additives, and spray 30-40 kg of water evenly; mainly candle grass and mai Niang For wheat fields, use 15% wheat pole 15-20 grams per mu to spray evenly; wheat fields dominated by Jiejie wheat have poor effect in spring, and manual extraction is generally adopted, and the time is controlled in late April to early to mid-May.
Combining with spring weeding and adding corresponding insecticides and fungicides, it can also cure diseases and insects, and achieve the purpose of one spray and multiple prevention.
2. Promote the weakness and control prosperity, skillfully apply jointing booting fertilizer
First of all, according to different fields and different seedling conditions, classify and guide, grasp the best period of application of jointing booting fertilizer, master it when the leaf color fades, the first internode length of the base is fixed, and the peak seedling begins to fall, topdressing per mu 4-5 kilograms of urea is used for strong stalks and prevention of falling, and 5-8 kilograms of potassium chloride per mu is used at the same time. If the colony is too large or has grown in the field, it is necessary to control it, do not fertilize, or delay fertilization by watching the seedlings, and spray fertilizer outside the roots. For fields that are under-grown and de-fertilized, apply early and appropriately increase the amount of fertilizer.
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Urinalysis test strips refer to test strips that test for bilirubin, urobilinogen, ketone bodies, ascorbic acid, glucose, protein (albumin), blood cells, PH, etc. in urine.
Detection principle
1. pH: The pH value in the range of 5-9 is measured by the pH indicator, and the pH value of the fresh urine of a normal person is between 5-7.
2. Nitrite: The reaction is based on the reduction of nitrate to nitrite by Gram-positive bacteria in the urine. The nitrite reacts with p-aminobenzenesulfonic acid to form diazonium compounds, which are then combined with N-(1-naphthalene) )-3 aminopropanesulfonate combined with a pink color.
3. Glucose: According to the reaction principle of glucose oxidase, glucose oxidase specifically oxidizes glucose to generate glucuronic acid and hydrogen peroxide. Under the action of hydrogen peroxide, hydrogen peroxide oxidizes the indicator and turns color. .
Classification
Urinalysis test strips are divided into visual series and machine series. The visual inspection series is divided into several models according to different inspection items; the machine inspection series is divided into several models according to different applicable instruments.
1. Classification by measurement method
1) Visual inspection series
When observing the result, compare the color with the standard color code within the time specified on the color code, judge and read the result.
2) Machine test series.
For instrument operation, refer to the instruction manual of the Urine Analyzer used.
2. According to the number of measurement items
There are single-item, 2-item, 4-item and multiple test strips. Currently, 10-item or 11-item multiple test strips are most commonly used in hospitals.
3. Classification by structure
Urinalysis test strips with single-layer membrane structure and multi-layer membrane structure.
Urine Reagent Strips,Urine Test Strip,Urine Sugar Strip Test,Visual Urine Analysis Strips
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