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通过三年来的试验,已经证明青鲜素(马来酰肼)对秋播甜菜越冬后的抽苔有抑制作用。青鲜素的经济有效浓度是相当于0.3%左右的马来酰肼。适当的施药时期是越冬甜菜开始抽苔前大约7—10天,用这样的措施可以推迟甜菜收获期大约一个月。1976年,秋播甜菜生产田实践表明,用青鲜素推迟抽苔,延长生长期24天后,每亩块根的实收产量及亩总糖都有较大幅度的增加。当然这还有待于今后在生产中进一步肯定。实践还表明,施用相当于0.4%马来酰胼的青鲜素,一个月后测定甜菜块根中,马来酰肼的残留量只有1.7ppm,因此不会影响食用价值。
Through three years of experiments, it has been demonstrated that the greening agent (maleic hydrazide) has an inhibitory effect on the bolting of autumnal beet overwintering. The cost-effective concentration of green is about 0.3% maleic hydrazide. Proper application time is about 7-10 days before the winter beets begin bolting, with such measures can delay the harvest of beet about a month. In 1976, the practice of autumn planting sugar beet production field showed that the yield per mu and the total sugar content increased significantly after 24-day extension of the growing period with boll-germent. Of course, this still needs to be further confirmed in the future. Practice also shows that the application of the equivalent of 0.4% of maleic hydrazide of the green, a month after the determination of beet root, the residual maleic hydrazide only 1.7ppm, it will not affect the value of consumption.