By foliar spraying of “γ-polyglutamic acid” diluted 1:500 times and 1:300 times on ginger, the stem height, branch, leaf length, leaf width, stem and leaf fresh weight, fresh ginger stem tuber weight were measured respectively. comparative analysis, etc.
Foliar spraying of “γ-polyglutamic acid” has different degrees of promoting effect on the growth and development of ginger.
The 1:500 and 1:300 times dilution spraying of γ-polyglutamic acid， fresh ginger stem tubers in the experimental area reached 87 450 kg/hm2 and 97 318 kg/hm2, respectively, an increase of 13.36% and 26.15% compared with the control, both of which were significantly or extremely high，significant level.
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