夏玉米看叶管理法（Summer maize leaf management method）.docVIP

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2017-08-03 发布于河南
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夏玉米看叶管理法（Summer maize leaf management method）.doc

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夏玉米看叶管理法（Summer maize leaf management method） Maize leaf is the main organ of photosynthesis in maize. The biological yield of 90%, 95% is made by photosynthesis of chloroplasts under the action of light. Leaf plays a decisive role in the growth and yield formation of maize, and the quality of leaf growth, the color depth and the size of leaves directly affect the yield of maize. Heiye, a corn leaf color black, shiny, with that, nitrogen supply and soil in corn too much, resulting in excessive nutrition and nitrogen in soil, vigorous vegetative growth, reproductive growth is weak. If the blade is black leaf at seedling stage, seedling growth may occur; if it is late in the leaves of Heiye, will cause the de differentiation of prolonged reproductive growth, heading off delay, Late Maturing Maize easily. The two had effects on yield. Heiye corn management skills: (1) late application of fertilizer and less application of nitrogen fertilizer. Seedling Heiye shiny, topdressing time can be delayed to trumpet a dressing date. When fertilizer less nitrogen, phosphorus and potassium in general, Mu Shi superphosphate potassium sulfate 25 kg, 15 kg, 3 kg of fertilizer was 30 kg or diammonium phosphate, potassium sulfate 20 kg, 3 kg of yuan fertilizer. (2) deep cultivation root cutting, growth control. At the seedling stage with weeding of Heiye corn weeding, deep tillage, root pruning, weeding, reducing root in soil nitrogen absorption quantity control, shoot growth, according to the conditions of deep cultivation, appropriate one to two times. (3) sprayed with Gao zhuang. 200ppm was used to spray corn at seedling stage. (4) water should be less late, with water fertilizer. At the seedling stage, the late Heiye corn take watering, watering less means to control the growth of water, fertilizer, water play in the transport function of corn in the body, let the leaves wilt, but not as long as the sun shaisi. Two, green leaf color is green, glossy leaves and shiny leaves, pretty,