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近年来,玉米氮素化肥的用量有所增加,但在施用期及分配比例上,各地出入很大。为了使有限的化肥在生产上充分发挥作用,我们于1978—80年进行了有关试验。一、试验简况试验地设于高陵县崇皇公社绳刘大队科研站,前茬小麦,渠井双灌,地力中等。1978年和1980年用陕单7号,1979年用黄白单交,小区面积0.1亩,每区4行、行距2尺、株距1.5尺,播期6月10日。
In recent years, the amount of corn nitrogen fertilizer has increased, but in the application period and distribution ratio, all over a great deal. In order to make full use of limited fertilizers in production, we carried out the tests in 1978-80. First, the experimental profile Experimental ground located in Gaoling County Chonghuang commune Rope Liu research station, the former crop of wheat, irrigation well irrigation, medium force. In 1978 and 1980 with Shandan 7, 1979, with yellow and white single pay, the plot area of 0.1 acres, 4 per district, spacing 2 feet, spacing 1.5 feet, sowing on June 10.