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通过盆栽试验和田间小区试验比较了叶施翠竹牌植物生长剂、丰收宝和三十烷醇对紫花苜蓿生长和产草量的影响。两年的试验结果表明,植物生长剂对苜蓿生长的促进作用和增产效果最显著,各茬苜蓿分枝初期叶施1:8000植物生长剂水液(操作液40～50公斤/亩),处理一次苜蓿产草量增加12.8～22.4％,处理二次(间隔10天)产量增加20.8～34.1％。1990年在天津宁河示范施用,110亩紫花苜蓿地平均每茬增产鲜草220.5公斤/亩,比对照地增产22.9～47.8％。
The effects of Phyllostachys praecox plant growing agent, Feng-bao Bao and triacontanol on the growth and yield of alfalfa were compared by pot experiment and field plot test. Two years of experimental results show that plant growth enhancers alfalfa growth promotion and yield the most significant effect, each crop alfalfa early leaf application of 1: 8000 aqueous solution of plant growth agent (40 to 50 kg of operating fluid), treatment The yield of alfalfa increased by 12.8% ~ 22.4% and the yield of secondary treatment (interval 10 days) increased by 20.8% ~ 34.1%. Demonstration in Ninghe, Tianjin in 1990, an average of 110 acres of alfalfa yield per plant fresh grass 220.5 kg / mu, 22.9 ~ 47.8% increase compared with the control.