Paving Stone,Stone Paver,Stone Slab Brother International Trading Co., Ltd. , http://www.jn-food.com
In the process of growth and development of corn, in addition to nitrogen, phosphorus, potassium, three major nutrients, but also boron, zinc, manganese, molybdenum and Other trace elements. Although these elements are used in small amounts, no matter which one is missing, it will be a limiting factor for the high quality and high yield of corn. Therefore, the application of micronutrients must be emphasized in production. Zinc deficiency symptoms: The plants develop slowly and the internodes become shorter. Zinc deficiency during the seedling and early growth stages. The lower half of the new leaf appears pale yellow or white. After that, yellowish spots or greenish striped spots appear between the veins. White or yellow tissue can be seen between the midrib and the edges. Or necrotic spots. After that, the leaves suddenly turned black and had a special metallic luster. The plants died after 3-5 days. During the late growth period, zinc deficiency occurs, and the silking and tasseling periods of the ear are delayed. The ear is short of seed and bald. Remedy: Foliar spraying 0.1-0.2% of zinc sulfate solution 2-3 times, spray 7-10 days 1, each with a good spray 50 acres with a solution. Symptoms of boron deficiency: Young leaves are weak and do not spread. White tissue appears. Leaves easily wither. White veins between old leaves and veins. Plant growth is thin and short. Ears are malformed. Grains are uneven, shrunken, and the top grains are open. Remedy: Foliage spray 2-3 times, spaced about 10 days to spray 1 time, each mu spray 0.2% of boric acid or borax solution 50 kg. If you choose borax, first use a small amount of warm water to dissolve it, then add fresh water and spray it in time. Symptoms of manganese deficiency: Young leaves turn yellow, and the leaves appear chlorometric yellow stripes parallel to the veins, while veins remain green, yellow stripes can gradually enlarge to form variegated spots, and leaves are soft and sagging. Remedy: foliar spray of 0.05-0.1% manganese sulfate solution, 5-7 days 1, even spray 2 times, each about 50 kg per mu spray fertilizer. Symptoms of molybdenum deficiency: firstly on the old leaves, the chlorosis between leaves and veins, the leaf margins are scorched and curled inward; corn kernels shrink, and the maturity period is delayed. Remedy: Continuously spray 2 times of ammonium molybdate solution, each time using 50 kg of ammonium molybdate per acre. Dissolve it first with a small amount of warm water and then add 50 kg of water and dilute it evenly.