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玉米营养钵矮化育苗,是在育苗期间玉米每长2—3片叶挪动营养钵一次,以控制玉米根系生长,降低植株高度,培育矮健壮苗,增加移栽密度,争取农时夺高产。这种育苗方法,开始于辽宁省丹东地区,近几年辽宁南部(春玉米)、北京郊区(夏玉米)和贵州、云南、浙江部分地区有较大面积的试验推广,获得较好的增产效果。例如,北京郊区近两年推广夏玉米营养钵矮化育苗7—10万亩,平均亩产增加15—20%。育苗技术培育理想的玉米矮健壮苗的标准,应该是株型紧凑,叶片密集,颜色浓绿,茎节扁粗。第一层次生根大部分憋在基部“五杈股”处,有1—1.5厘米长。移栽后基本上不缓苗或缓苗期很短,生长旺盛。(一)制做营养钵。营养钵要求含有丰富的氮、磷、钾养分,吸水和通气良好,在移栽过程中不易散
Corn nutrition bowl dwarf nursery, corn growing 2-3 times per acre during the nursery nutrition bowls to control corn root growth, reduce plant height, grow short and strong seedlings, increase transplanting density, strive for high yield when farming. This nursery method began in Dandong, Liaoning Province. In recent years, southern Liaoning (spring maize), Beijing suburbs (summer maize) and parts of Guizhou, Yunnan and Zhejiang have a large area of experimental popularization to obtain better yield increase . For example, the suburbs of Beijing in the past two years to promote summer maize nutrition bowl dwarf nursery 7-10 million mu, an average increase of 15-20% per mu. Nursery techniques to cultivate the ideal corn sturdy seedlings standards should be compact plant type, dense leaves, dark green color, stem flat side. Most of the first level of rooting holds back at the base of the “five branches”, 1-1.5 cm long. After transplanting is basically not slow or Huanmiao very short, vigorous growth. (A) making nutritional bowl. Nutritional bowl requirements are rich in nitrogen, phosphorus and potassium nutrients, good water absorption and ventilation in the transplanting process is not easy to disperse