Classified control of yellowing of wheat seedlings in winter

Due to poor sowing moisture, insufficient soil moisture, irregular emergence, poor growth and development, wheat seedlings turn yellow, which should be irrigated reasonably according to local conditions.

If the seedlings are yellow due to lack of fertilizer nutrition, nitrogen, phosphorus and potassium fertilizers must be applied in time, 15 kilograms of urea per mu should be applied to dilute manure water, and 0.5 kilograms of potassium dihydrogen phosphate per mu should be sprayed on the water leaf surface for 1 or 2 times to promote the wheat seedlings to change color in time.

For the yellowing of wheat seedlings caused by clayey and heavily consolidated saline-alkali land, 20,30kg calcium superphosphate per mu was used, soaked in 40kg water for 5 hours, then diluted with 60kg water, and the clear solution was irrigated to the root. It can also be applied with dilute dung water plus vinegar of 2 kg per mu.

The yellow seedlings damaged by leaf rust and stripe rust should be sprayed with water in time. For the yellow seedlings caused by red spiders and wheat aphids, 40% omethoate EC and gray aphid powder can be used for targeted spray control.

For the soiled paddy fields with too high soil water content, the yellow seedlings caused by root dyspnea should be drained by ditch drainage, medium ploughing and loosening soil, combined with 60 kg of plant ash per mu to promote growth and development.

For yellow seedlings caused by acidity and lack of trace elements, 25 kg of quicklime per mu, 1200 kg of water to irrigate roots, and 20 grams of ammonium platinate can also be used to spray 70 kg of water.