Nitrogen deficiency symptoms: The main performance of the plant is short and thin, with few and weak tillers, and the leaves are small and erect. The leaves are yellow-green and the old leaves are dry. The base leaves gradually become yellow and the stems are sometimes lavender. Phosphorus deficiency: The leaves have dark purple in the green, dull, small plants, few tillers, very few secondary roots, and the base of the stem is purple. Growth stagnated in the early stages and shrinkage occurred. The tip of the leaf is reddish purple in the green period, and the ripening of heading is delayed. Potassium Deficiency: mainly in the lower leaves appear yellow spots first, starting from the tip of the old leaves, and then extending inward along the veins, the macula and the healthy part of the sector is obvious, severe when the old leaf tip and leaf margin coke-like, thin stalks, roots Poor development, premature aging. Zinc deficiency: The main manifestation is that the total color of the leaf is reduced, the tip of the leaf is stopped growing, the leaves are chlorotic, the internodes are shortened, and the plants are dwarfed. Manganese deficiency: yellow seedlings are mainly characterized by soft under the leaves, stripped chlorosis between the new veins, from yellow-green to yellow, veins are still green; sometimes the leaves are light green, the yellow stripes expand into brown spots, the tip appears Jiao dry. Deficiency of molybdenum: mainly manifested as chlorotic chlorosis of leaves, starting from the tip of the old leaf to the edge of the leaf, and then spreading inward by the leaf margin, first the spots, then the lines and slices, and the yellowing part becomes brown. Finally died. Boron deficiency: Abnormal childbirth, severe head failure. Even if you pull out wheat ears, they do not bloom and become strong.
Prevention and control methods Nitrogen deficiency: First, apply a compost that has been thoroughly decomposed organic fertilizer or fermented bacteria. Secondly, according to the general survey of the soil, using formula fertilization technology, the preparation of special wheat fertilizer. When responding to an emergency, 700 to 1,000 kilograms of urine or 15 to 20 kilograms of ammonium sulfate per acre may be applied, and urea solution of 1.5% to 2% may be sprayed for 2 to 3 times, each time between 7 and 10 days. Phosphorus deficiency: 30-50 kg per mu of topdressing calcium. You can also spray 1%~2% Pu-calcium clarified solution or 0.3% potassium dihydrogen phosphate solution 2~3 times. Potassium deficiency: topdressing potassium sulfate or potassium chloride 7 to 10 kg per mu or 200 kg of plant ash, can also be sprayed with 1% potassium or potassium chloride solution or 0.3% of potassium dihydrogen phosphate solution 2 to 3 times. Zinc deficiency: 1 kg of zinc sulfate per acre or spraying 0.2% of zinc sulfate solution 2 ~ 3 times. Manganese deficiency: 1 kg per gram of manganese sulfate or 0.1% manganese sulfate spray applied 2 to 3 times per acre. Deficient molybdenum: can be sprayed 0.05% ammonium molybdate solution 1 ~ 2 times, interval 7 ~ 10 days. Boron deficiency: Foliar spraying with 0.1%~0.2% borax solution, once every 7~10 days, spray 2~3 times.
Drum Separator
HEBEI PINGLE FLOUR MACHINERY GROUP CO., LTD , https://www.plrollermill.com