Effects of leaf sprayed with gibberellin on the vegetable sweetpotato yield and quality
The Ecaishu No.2 was selected as the material to research the effects of leaf sprayed with gibberellin on the yield and quality of vegetable sweetpotato.The results showed that at the early stage of the growth,the spraying of gibberellin on the leaf could increase the number of branches in the upper part of the vegetable sweetpotato,the greater the concentration is,the more obvious the increas is.In the whole growth period of vegetable sweetpotato,foliar spraying gibberellin could decrease the nitrogen content of stem,but could not significantly effect on the nitrogen content of leaf and stem.Foliar spray gibberellin could increase the content sucrose and soluble sugar of stem tip,so that it could make the taste of vegetable sweetpotato become better,and improve the quality of its edible part.In addition,foliar spraying gibberellin could increase stem tip yield.Thus,foliar spraying gibberellin could not only promote the branch and improve the yield,but also improve the quality of edible parts of the vegetable sweetpotato.
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