Although the late sowing wheat has the disadvantages of small pre-winter seedling age and fewer tillers, it is generally good at the bottom of the field and the fertilizer is sufficient, and there is basically no shortage of fertilizer during the jointing period of the green period. If it can be pressed early in the spring, it can be controlled carefully before jointing and after jointing. With the management of the four key points such as rush, disease prevention and weed control, it is still possible to achieve a yield of about 500 kilograms per mu.
First, spring is early.
When wheat fields are thawed during the spring season, they can breathe twice, increase the temperature of the soil, maintain the soil moisture content, promote the development of the root system, and make the young wheat sprouts grow quickly. According to a survey conducted in late March, the temperature of the wheat field in the crop plots was increased by 1Â°C to 2Â°C, and the secondary roots were increased by 2 to 3 lines.
Second, before the jointing control.
The outstanding characteristic of late-season wheat fields in general is that the total number of stems per mu is insufficient before winter. Therefore, the use of greenish-fungi water can effectively expand the population and strive to produce more spikes. However, it is not advisable to top-fend the fertilizer and water before jointing so as to control ineffective spring floods and promote winters. Before the glutinous spike, achieve the best yield.
Third, after the jointing rush.
Practice has shown that the jointing stage of late-seeding wheat field water and fertilizer onslaught not only effectively improve the spike rate of wheat, increase the number of grains per panicle, but also promote the growth of flag leaves, its leaves and panicle stem sections, improve the photosynthetic efficiency in the middle and later stages, increase wheat The weight of one thousand grains and the amount of topdressing fertilizer are appropriate, and on the basis of applying basic fertilizers before the year before, Mu recovers urea from 20 to 25 kilograms or topdresses from 50 to 75 kilograms of ammonium bicarbonate. And combined with good pouring ear water, flowering grouting water.
Fourth, integrated pest control.
Grass damage should be removed before the jointing of the wheat, that is, weed 2 leaves 1 heart. The wheat pests are mainly aphids, and the disease is mainly powdery mildew. Based on accurate prediction and prediction, comprehensive prevention and control can be performed with dimethoate, triadimefon or thiophanate-methyl during the best drug application period (mid-May). 2 times, in order to meet the demand for nutrients in the late growth stage of late-seeding wheat, it can be combined with spraying aqueous solution of potassium sulfate, potassium dihydrogen phosphate and other aqueous solutions for pest control to increase the grain weight.
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