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河北省平泉县农业广播学校学员刘柏,1987年,在自留地上栽培甘蓝,采取“一膜连用加小拱”和“两早、一刀、插空栽”等措施,使甘蓝二次结球,创亩产值3000多元的纪录,给菜农开拓了高产高效益栽培甘蓝的新路子。他选用早熟品种“报春”,于2月28日在温室内育苗。4月1日将育好的甘蓝苗按株距46厘米、行距40厘米定植,床面宽66厘米、高10厘米,并用地膜覆盖畦面,畦上再加扣小拱棚以防早春霜冻危害
Liu Ping, a trainee at the Pingquan Agricultural Broadcasting School in Hebei Province, cultivated cabbage on the reserved plots in 1987 and adopted measures such as “one film plus small arches” and “two early morning, one knife, A record production of more than 3000 yuan mu, to vegetable farmers to open up a new high yield and high efficiency cabbage cultivation. He used the precocious species ”Primula" and nursed it in the greenhouse on February 28. April 1 will be breeding good cabbage seedlings by plant spacing 46 cm, spacing 40 cm colonization, the bed width of 66 cm, 10 cm high, and covered with mulberry noodles, 畦 together with small shed to prevent the early spring frost damage