【摘 要】
：
1991-1993年,栾城县连续在夏玉米上大面积示范推广涂层尿素,获得比施用普通尿素平均亩增产10%左右的良好效果,受到广大农民的欢迎。连续三年的示范结果表明:在当地夏玉米常
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1991-1993年,栾城县连续在夏玉米上大面积示范推广涂层尿素,获得比施用普通尿素平均亩增产10%左右的良好效果,受到广大农民的欢迎。连续三年的示范结果表明:在当地夏玉米常年亩产500公斤的条件下,涂层尿素一般的适宜用量为25～35公斤,超过这一界限,
From 1991 to 1993, Luancheng County continued to demonstrate and popularize coated urea over a large area on summer maize, obtaining a good result of about 10% increase over the average mu of ordinary urea, which was well received by farmers. Three consecutive years of demonstration results show that: in the local annual summer corn 500 kg per mu yield conditions, the appropriate amount of coated urea generally 25 to 35 kg, beyond this limit,
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