Composite foliage Si fertilizer for lowering contents of heavy metals and nitrate in vegetable, and preparation method thereof

US9017444B2 · kind B2 · utility

Assignee

• GUANGDONG INSTITUTE OF ECO-ENVIRONMENT AND SOIL SCIENCES · CN

Inventors

• Chuanping Liu · Tangxia, CN
• Qing Li · Shanghai, CN
• Fangbai Li · Tangxia, CN
• Tongxu Liu · 流花街道, CN
• Xianghua Xu · Basingstoke, GB
• Huimin Li · Longbeilingcun, CN

Key dates

• Filing date: Aug 3, 2010
• Grant date: Apr 28, 2015
• Expiry date: Apr 20, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C05G5/27
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention is related to the field of environmental protection, more specifically, to a foliage silicon fertilizer and a method for production of the fertilizer, which is a molybdenum-silica compound sol used for reducing heavy metal and nitrates in vegetables. The fertilizer, which is a molybdenum-silica compound sol, comprises 10-25 wt % silica, 0.05-5.5 wt % molybdenum ions. More preferably, the fertilize, which is a rare earth-molybdenum-silica compound sol, comprises 10-25 wt % silica, 0.05-5.5 wt % molybdenum ions and 0.1-7.5 wt % rare earth ions. By the combination of silica with molybdenum in the present invention, it is effective for preventing the absorption/accumulation of nitrates in vegetables. In addition, by the further combination with rare earth element, the prevention ability of the fertilizer from absorbing heavy metal and nitrates into vegetables is even enhanced. With a preparation method with normal pressure and relatively, low temperature, that is, with mild condition, simple process and high operability, large scale production of the present invention may be readily executed.