First, strengthen fertilizer and water management, and scientifically manage fertilizer.
It is necessary to firmly seize the limited season of about half an month in mid-February and timely watering to ensure that before February 15th, three types of seedlings will be subjected to “fighting with water and fertilizer, and using two fertilizers (returning green manure and jointing fertilizer)â€. Mu topdressing 7-8 kilograms of urea, two types of seedlings and wheat fields per acre topdressing 4-5 kilograms of urea, to promote the development of tillers and secondary roots, promote tillering into panicles, increase the number of mu spikes. For wheat fields that have been irrigated with water, but have not followed up with fertilized materials, seedlings of the first and second crops should be applied as early as possible. The fertilizer can be advanced as early as the end of February to the beginning of March. 10 kg. The first and second types of seedlings and wheat fields that have not been poured into the water should be watered early, combined with watering, and 10 kg of fertilizer (two fertilizers) should be applied at once to promote balanced development of the seedlings. For the three types of seed and wheat fields that have been replanted with green manure, the jointing fertilizer should be postponed to mid-to-late March, with 5 kilograms of urea applied per acre, in order to consolidate the tillers to form a panicle, promote floret differentiation, and strive for large spikes and grains. For drought-resisting and cold-frozen wheat fields, combined with pest control, amino acid foliar fertilizers can be used to spray fertilizer and regulate plant growth.
Second, scientific regulation, promotion and control combined.
For wheat fields with individual high stalks, large populations, overgrowth, and lodging habits (such as Yannong 19, etc.), it is possible to suppress or spray Maiyefeng (Zhuangfengan) and paclobutrazol before the wheat rise-jointing stage. Plant growth regulators, such as controlling the growth of plants, promoting root bar, prevent late lodging. For irrigated wheat fields, especially silty wheat fields, as far as possible, plowing should be carried out in order to loosen the soil and protect soil to prevent soil compaction and improve the effect of drought resistance. For the three types of weak seedlings, the wheat field can be used in shallow cultivating to raise the ground temperature and maintain moisture. Promote the early growth of wheat and promote the transformation of the seedlings. For the individual fields with prosperous growth, they can damage part of the root system, inhibit the ineffective delivery, and control the wheat growth.
Third, comprehensive prevention and control of diseases, insects, weeds.
The focus is on the prevention and control of wheat sheath blight, spider mites, aphids, powdery mildew and other major pests and weeds in spring.
1, wheat sheath blight. 10% to 15% of the wheat field strains are sprayed in time, 25 grams of active ingredients for the wells and wax buds, or 6-7 grams of active ingredients of triadimefon, or 9 grams of active ingredients of Jinggangmycin, or C rings. 9 grams of active ingredient azole, water spray control 50 kg. The spray of medicament is selected to be carried out in the morning when there is dew, so that the liquid can flow to the base of the wheat plant. After spraying for the first time in the severe ward area, it was sprayed once more every 10 days.
2, wheat aphids. When the amount of wheat bran in the field exceeds 250/100 plants, 6 g of active ingredient of pymetrozine or 2 g of active ingredient of acetamiprid, or 4 g of active ingredient of imidacloprid, or 3.6-4.8 g of active ingredient of imidacloprid are used. , Spray control, water spray control 50 kg.
3, wheat spiders. For 250 to 100 plant plots, 20% WP can be used as 1000-1500 times solution or 50% Malathion EC 2,000 times or avermectin (such as 1.8% avermectin) Emulsion 2000 times) pesticides to prevent and control. After 5 o'clock in the afternoon, the effect of spraying is good.
4, wheat powdery mildew. For a field with a diseased leaf rate of 5%, the effective amount of triadimefon is 6-7 grams per mu, or 8 grams of the effective amount of fenzoyl alcohol, or 9 grams of the active ingredient of propiconazole, and 50 kg of watered spray.
5, wheat rust. When the wheat stripe rust monolithic disease leaf is found in the field, the diseased leaves should be immediately taken out of the field and burned or buried deeply. For early-onset disease centers, cofferdams should be immediately controlled to effectively control its spread. When Daejeon's leaf rust disease rate reaches 0.5% to 1%, it should be treated immediately. When the leaf rust disease rate reaches 10%, it should be treated with drugs. The variety and dosage of the control agent were the same as wheat powdery mildew. Severe disease plots were sprayed 10 days after the first spraying.
6, weed control. The first is to combine manual cultivator weeding; the second is to take the opportunity to implement chemical control depending on the temperature conditions. When the minimum temperature reaches 5°C or above, chemical prevention can be carried out. In the case of heavy hayfields such as sow wormwood, leeks, clams, and swine crickets, tribenuron-methyl (such as superstars, broad-leaved leaves, and 1 g of active ingredients per mu) can be used; for hardgrass, acorns, wild Oats and other grass and broad-leaved weeds can be mixed with 36% geranium 145-160 ml or 6.9% humic oil 50 ml + 20% bromobenzene benzoate 100 ml, and sprayed with 40 kg of uniform spray. Spraying should pay attention to spray, prevent heavy spray, spray, rainy weather, windy or dew should not be sprayed, chemical weeding to end before the jointing of wheat.
Fourth, to prevent late spring and cold temperature hazards.
At present, it is the transition period from winter to spring. Cold air activity is frequent, and the temperature varies greatly. All regions must take measures against the characteristics of the situation of the crop and climate change, take measures as soon as possible before the occurrence of frost damage, control the growth of the weak, cultivate strong seedlings, and improve the wheat seedlings. Quality, enhance the ability to resist disasters. Especially after the jointing of wheat, we must pay close attention to the changes in the weather. Where conditions permit, we can carry out irrigation and antifreeze before the cold current. After the cold has passed, the seedlings should be checked in time. If the leaves are found to be severely dry or the leaves and young ears are immersed in water, measures such as nitrogen fertilizer application and foliar fertilizer spraying should be taken in time to promote the early birth of the new childbirth so as to minimize Freezing damage.
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