Countermeasures to control the prosperity of wheat before winter

(agricultural get Rich Network) as the saying goes, "there is no wheat." The vigorous growth of wheat seedlings before winter can advance the growth period, reduce the accumulation of nutrients and reduce the cold resistance, which is not conducive to safe overwintering.

1. Sow weak seedlings formed prematurely

This kind of prosperous seedlings often flourish at first and then weak, and freeze injury will occur when they encounter a low temperature of minus 10 ℃ in winter and last for about 5 hours. It is recommended to opt for sunny day suppression. Timely paddling and watering after suppression, 15 kg ammonium bicarbonate per mu; if necessary, foliar spraying with 0.2-0.3% dwarf solution can also restrain growth and resist frost damage.

two。 Strong seedlings formed by excessive sowing quantity

It is suggested that the seedlings should be thinned in time, a suitable population structure should be established to promote individual development, and combined with watering, an appropriate amount of nitrogen and phosphorus fertilizer should be added to make up for the excessive consumption of soil nutrients.

3. Strong seedlings formed by excessive fertilizer and water

It is recommended to cut off the roots with a deep hoe. When the main stem of wheat seedlings grows 5 leaves, hoe 5 cm deep between wheat rows, cut off part of the secondary roots, control nutrient absorption, reduce tillers and cultivate strong seedlings.

4. Strong seedlings formed by improper selection of varieties

Some spring and weak winter varieties sowed too early will also lead to prosperity before winter; this kind of seedlings are most vulnerable to freezing in winter. It is suggested that on the basis of early hoeing and suppression, the roots should be surrounded by soil before winter, or covered with "masked dung" to protect wheat seedlings safely through the winter.