Recently, many farmers have reported that the wheat seedlings have begun to have a variety of unexplained yellowing phenomena and serious yellow wheat fields have been found. In response to reports from farmers, a few days ago, the reporter had an exclusive interview with the famous wheat breeding expert Wang Mingxuan, a senior agronomist at the Northwest A&F University. He said that in recent years, the phenomenon of yellowing of wheat has frequently appeared. There are five main reasons for this: During the fall of fertilizer and yellowing this year, in the face of over-agricultural expenditure, some farmers have reduced the amount of fertilizers in order to save on inputs. Secondly, they have purchased cheap fertilizers because of cheap plans; Improper fertilizer. In addition, the poor quality of the site preparation, the large size of the rice dumplings, and the poor integration of the soil and fertilizer are often due to the fact that the soil fertilizer has not yet been fused but has lost part of the evaporation with temperature, such as carbon ammonium and other chemically unstable fertilizers. Urea can be applied 10 acres of urea, plus 45% of compound fertilizer 15 to 20 kg, mix evenly è¶ è¶ å¢’ rain applicator. At the same time, combined with top-dressing "mu" high-efficiency foliar fertilizer 4 ml, "Albit" new plant growth regulator 4 ml, mixed into a homogeneous solution with 60 kg of foliar spray fertilizer, can prompt the seedlings quickly turn green. Yellowing of drug injury The current yellowing of wheat drug injury is mainly caused by improper application of herbicides, such as overdosing, or mixed application of several herbicides, or mixed application of herbicides with paclobutrazol, or high concentration use of syrups. Each acre can be used to "powder" leaf fertilizer 6 ml, add "Albit" 6 ml, mixed evenly 60 kg of water spray, or herbicide control agent "naphthalene" 200 grams, watered 60 to 90 Jin spray. The main yellowing of wetness is when the field is too wet at the time of sowing, the soil is too stiff, the root system of wheat is difficult to pull down, nutrient absorption is difficult, and the yellow seedlings are yellow. Each acre can be used "Albit" 8 ml, mixed with foliar fertilizer mixed with water 120 kg spraying the surface of the soil, conditions can also be applied per mu acreage 100 ~ 150 kg. Due to the weather, the wet sowing of the fields in autumn this year has become common. In addition, the rainfall after sowing is high and the temperature is high, which causes wheat sheath blight to be endangered in some fields, especially in wheat fields with heavy wetness. . One hundred milliliters of "Jinggang Cattle Bacteria" can be used per acre, plus 4 ml of "Albit", mixed into 60 kg spray of homogenized solution. At the same time, clean up the "three channels" to reduce the humidity in the fields and create a microclimate in the fields where unfavorable diseases occur. Yellowing of pests Yellow pests that cause yellowing of wheat are mainly underground pests, such as golden needle worms and cockroaches. Underground pests frequently take roots and feed the roots and stems, causing yellowing of the entire wheat seedlings. Each mu can be used to "land tiger lore" 160 ml plus "Albit" 8 ml watered 60 ~ 90 kg in sunny afternoon spray. For fields that have caused serious yellow seedlings, measures such as spraying paclobutrazol fertilizer and applying quick-acting fertilizer should be taken to promote rapid recovery of wheat seedlings.
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