喷锌对蕹菜锌含量及产量的影响

Influence of Spraying Zn on Yield and Intramatrical Zn Concentration of Water Convolvulus

不同喷施浓度及喷施次数对蕹菜产量及茎叶锌含量的影响结果表明 :喷施 0 0 5%及0 1 %的硫酸锌液均能提高蕹菜的产量 ,但以 0 0 5%的处理对产量的提高作用最明显 ,浓度超过0 1 %时 ,对蕹菜生长有抑制作用 ;提高喷锌浓度 ,蕹菜锌含量的增加为叶片大于茎 ;喷施 1～ 2次 ,有明显的增产效果 ,喷施超过 2次反而减产 ;随着喷施次数的增加 。

Study on influence of application different concentration and times of ZnSO 4·7H 2O on yield and Zn concentration of stems and leaves.Results showed that 0.05% and 0.1% of ZnSO 4 raised yield of water convolvulus.But effect of 0.05% ZnSO 4 was more significant.Concentration of ZnSO 4 more than 0.1% inhibited growth of water convolvulus.Raising Zn concentration,increase of Zn concentration in leaves was more than in stems.Yield increased significantly when spraying Zn 1-2 times,but if more than 2 times,yield decreased.Zn concentration in water convolvulus increased with application times increasing.