The topdressing of nitrogen fertilizer in wheat field is to shift the topdressing time from early spring to jointing stage. This technology can effectively promote the tillering of wheat and increase the number of grains per panicle. It can also effectively increase the content of wheat grain protein and achieve the effect of double increase in yield and quality.
The timing of dressing is generally reduced in the wheat population, the leaf color is lighter, and it is advisable to top-dress regularly during the first internode of the stem base. For the wheat fields with prosperous growth and large groups, it is better to apply them at the late jointing stage to the tip of flag leaves.
The amount of topdressing depends on soil fertility, base fertilizer conditions and seedling quality. Generally, 40%-50% of the total amount of nitrogen applied to the wheat production target plan can be applied. For wheat fields that are not topped with wax fertilizer (Winter Fertilizer), Mushi urea is 10-15 kg or ammonium bicarbonate is 25-30 kg; for wheat fields that have been applied with wax fertilizer (Winter Fertilizer), the amount of topdressing fertilizer may be reduced.
Fertilizer application method using urea fertilizer, can be applied after the rain or sprinkle water. With ammonium bicarbonate top dressing, you can make a hole in the ridge between the ridge or use hoe ditch to spread the fertilizer along the ditch immediately after the cover soil practical, to prevent the naked nitrogen volatile, watering after fertilization is better.
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