Polymalic acid and / or salt thereof in the manufacture of products and methods of preparation and application of the fertilizer prepared

The present invention discloses a malic acid and / or its products and applications and a process for preparing polyethylene in the manufacture of fertilizer salts prepared, poly-malic acid, and salts for the production of fertilizer, to broaden the use of poly-malic acid and salts thereof, malic acid and salts thereof produced by the polymerization can be absorbed by plants, will not cause secondary contamination of soil, malic acid, and salts and polyethylene have a greater affinity for a number of fertilizer nutrients, can accelerate the formation of root crops, reduce the amount of fertilizer, increase production and fertilizer use efficiency and crop performance, with a wide range of applications.