The one-year plan is spring. China's winter wheat has entered the critical period of spring field comprehensive management. Here we will focus on rational fertilization and talk about how to comprehensively manage winter wheat based on soil fertility, lyrics, and seedling conditions.

Winter wheat is a tiller crop. The total number of stems per acre is an important factor in the yield, and it is also an important indicator to reflect the condition of the seedlings and fertilization. If the total number of stems is too low, the yield potential of fertilizers cannot be fully utilized. However, if the total number of stems is too high or the density is too large, the percentage of spikes, grains per panicle and grain weight will be reduced and the risk of lodging will be increased. In spring, the winter wheat ear is also determined. The critical period of grain number, if combined with water and fertilizer, and suitable supply in appropriate periods, will also significantly increase wheat yield. Therefore, the key technology for rational fertilization in the spring is to adopt different management measures according to the soil fertility, lyrics, seedlings, and previous fertilization of different plots when not farming.

Three types of seedlings, wheat fields and wheat fields with less than 450,000 total stems per acre before returning green, with lighter leaf color and poorer growing conditions, shall be subject to fertilizer and water management in a timely manner. Spring top dressing may be performed in two stages. The first time in the returning green period, topdressing 5-8 kg of urea per acre with watering; the second time during the jointing period, 10-15 kg of urea was topdressed with watering.

The second type of seedlings and wheat fields have a total number of stems per acre between 45-60,000 tons before returning green. The second type of seedlings and wheat fields with a small population have a 10 to 15 kilograms of urea per acre combined with watering during the wheat season. Wheat fields with weak wheat populations can be top-dressed and watered in the early stages of getting up. The suitable wheat fields should be top-dressed and watered later.

One type of seedlings and wheat fields have a total number of stems per acre between 600,000 and 800,000 before the returning green season. A group of seedlings with suitable wheat seedlings and strong wheat seedlings can be used to combine urea 12-15 kg per acre after standing up to the jointing stage. .

The seedlings in Wangmiao wheat field must have cultivator and repression to reduce the use of nitrogen fertilizer, control the population growth, prevent lodging and greediness and late maturity. Generally, 8-10 kilograms of urea can be applied per acre in the later jointing period.

Severe drought-afflicted wheat fields For wheat fields that are severely affected by drought, yellow spots and dead seedlings, they should be watered immediately after soil thawing in early spring, and 7-10 kg of urea should be applied per acre to promote seedling growth and return to early green age. After returning to the green stage, the jointing period of 10 to 15 kg of urea per acre was combined with watering.

Waterless wheat fields should be combined with retrieving and cutting in the dry-land wheat fields that are not water-irrigated, so as to improve the drought resistance of wheat itself. In early spring, the soil returns to the soil or rainfall, and 5-7 kilograms of urea can be applied with chemical fertilizer or ditching. If there is rain in the middle and later stages of fertility, 5-10 kilograms of urea can be applied per acre.

Late sowing of wheat in late sowing wheat fields generally occurs in the northern winter wheat area, due to the late harvest of late crops, can not be released, or delayed due to lack of soil moisture, rain and other reasons. The total number of stems of late-seeding wheat is often low and the seedlings are weak. Therefore, fertilization should be appropriately increased to promote tillering and robust plants. Late-seeding wheat is more vulnerable to dry-hot wind hazards, and spraying 2-3 times with 0.3% potassium dihydrogen phosphate and 0.5% urea solution can be used for prevention and control.

In addition, the application of phosphate fertilizer or phosphorus-deficient field plots to the base fertilizer is accompanied by the application of diammonium phosphate; the spraying of urea and potassium dihydrogen phosphate on the plots without irrigation conditions or lack of effective precipitation can play a role as fertilizer and water. . It is also possible to apply organic fertilizers to cover the insulation, preserve the crop, and improve crop nutrition to promote water and fertilizer coordination. For those fields that do not apply organic fertilizer for a long time, microelement fertilizers such as molybdenum, boron, and zinc fertilizers may be added appropriately.

Our country is very big. The above fertilization techniques are mainly aimed at North China. Although the basic principles are universally applicable, specific practices must be adapted to local conditions. For example, the climate in the northwest is arid and the area of ​​saline-alkali soil is large. Reasonable fertilization must be combined with measures for drought resistance and salinization; the “three channels” (Seowou, Yaogou, Weigou) should be excavated in the middle and lower reaches of the Yangtze River. ), Drainage, flood control, prevention of frost damage and attention to the lack of elements such as manganese; southern spring more rain but joint drought period in areas, not only to prevent flooding but also pay attention to flood irrigation.

FRESH WAXY CORN

YELLOW COLOR VACUMMN FRESH WAXY CORN FOR HUMAN EATTING , SWEET CORN PLANTED IN INNER MONGOLIA CHINA.

VACUMMN FRESH WAXY CORN FOR HUMAN EATTING

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