Wang Miao's classification management Fertilizer over-water type. Because of the high foundation of fertility, the sensation is full, resulting in many tillers, large leaves, and severe shading in the fields, forming Wang Miao. These types of wheat seedlings should be dominated by sorghum and repression combined to suppress tillering. When the main stem grows 5 leaves, a secondary root 6-8 cm deep will damage the ability of the seedlings to absorb nutrients, reduce the tillering, and cultivate. Strong seedlings are wintering. Early sowing type. The appearance of this type of wheat seedling with prosperous tendencies is: the black and green leaves of the seedlings are long and narrow, with leaf-shaped drape and lack of tillering. When encountering a temperature of minus 10°C for about 5 hours, wheat seedlings will suffer from freezing injury. This kind of wheat seedlings must be controlled to promote, that is, in the prosperous time for 2 to 3 times in time to suppress, after the suppression of deep squat, combined with pouring winter water, topdressing urea 6 ~ 8 kg per mu, can also spray 15% paclobutrazol 40 Ke 40 kg suppression of water prosperous. Sowing too large. Such wheat seedlings are characterized by crowded populations, individual maldevelopment, thin main stems, yellow leaves, and withered lower leaves, with little tillering and secondary roots. Management should be based on sparse seedlings and strengthen fertilizer and water management. The sparse seedlings should master about 180,000 basic seedlings per acre low-yield field, 15-180000 mid-production lands, and 12-140 thousand high-yield farms. After thinning seedlings, topdressing 15 kg of ternary compound fertilizer in a timely manner and then pouring water into the ploughing to promote individual development. Improper species. In addition to cultivating alfalfa, such wheat fields should focus on pre-winter dung soil to ensure safe winter wheat. Weak seedling classification management The weak seedlings caused by the lack of nitrogen in the soil are erect and thin, and the tillers are reduced, and the leaves are narrow and short. The lower leaves start from the tips of the leaves, gradually turn yellow and dry, and develop towards the upper leaves. Urea can be used 7 to 8 kg per mu, or ammonium bicarbonate 20 to 25 kg. The roots of weak seedlings caused by phosphorus deficiency in soil development are poor, secondary roots are few and weak, leaf color is dull green, leaf tip and leaf sheath are purple, plants are thin, and tillers are reduced. Can use superphosphate 20 to 30 kilograms per acre, the sooner the effect of remedial action, the better. The weak seedlings caused by soil wetting are pale purple in color, the birth is slow, and the tips are white and dry. It can be used for timely ventilation of deep cultivating, and then applying a small amount of quick-acting fertilizer to promote early onset of seedling growth. The seedlings of weak seedlings caused by excessive sowing are overcrowded and the plants are thin and slender. Can first pay close attention to sparse seedlings, especially the head, the edge of the field and the field of "grass seedlings", early sparse, sparse, and then apply a small amount of nitrogen and phosphorus quick-acting fertilizer, to make up for excessive consumption of soil nutrients, to promote the wheat seedlings by the weak strong. The weak seedlings caused by sowing are too close to the surface due to the tiller node, and the water nutrient conditions are poor, so that the growth of the root system and the development of the axillary buds are inhibited. Therefore, the roots and tendons are generally reduced, and the plants are weak in yellow and are easily dies of freezing. Can be applied organic fertilizer, appropriate cover grass, soil around the roots; when the aboveground part of the plant basically stopped growing, the soil was broken. Combined Compressed Air Dryer,Compressed Air Dryer,Compressed Air Dryer System,Air Dryer Systems Hangzhou Zhongju air separation equipment manufacturing Co., Ltd , https://www.hzzjkfzz.com
Weak seedlings caused by soil drought occurred in wheat fields with insufficient soil moisture or run through the wind. They are characterized by slow birth, gray-green leaves, short and short leaves, slow growth or stagnation, and yellow and dry leaves in the middle and lower leaves. And fine. Can be combined with irrigation, topdressing 15 kg of ammonium per acre.
The weak seedlings caused by planting too late were due to the short growing period before winter, and the accumulated temperature was insufficient, which resulted in the growth of wheat seedlings being thin and weak and having fewer tillers. The fertilizer can be used for fertilizer supplementation. In the three-leaf stage, the application of ammonium bicarbonate is 15 to 20 kilograms; in the wheat field with poor soil moisture and fast water seepage, the drip water is poured in time after the three-leaf stage, and the last time it is ploughed before freezing, attention should be paid to the soil-rooting. Protect the seedlings safely for the winter.
Category screened tube good winter wheat weak seedlings
The seedling stage of winter wheat belongs to the vegetative growth stage, and the growth of winter wheat at this stage directly affects the yield. In order to achieve high yields and quality, it is necessary to strengthen the management of winter wheat seedlings. Therefore, the author gives guidance to the majority of growers from the perspective of weak wheat and wheat seedlings.