1960s, the United States Department of agriculture, the Northern Research Center CNRRC) Gugliemelli first developed a starch graft polypropylene eye water absorbent resin. The results of their research immediately aroused widespread concern in the world, countries have carried out this study. In 1980s the world has been industrialized production of polymer super absorbent resin, and it has been widely applied in medicine and health, soil moisture conservation, anti leakage, humidity and so on.

At present, there are two main types of water absorbent resin used in agriculture: the graft copolymerization of acrylic acid and acrylic acid, which has the advantages of high water absorption rate and high water absorption rate. Maximum absorption rate of pure water up to 500-1000 times (mass ratio), the service life of 1-2 years. Acrylic amine, its water absorption rate is relatively slow, the highest absorption rate of pure water in about 100-300 times, the service life of 3-4 years.

At present, there are several characteristics in the study of polymer superabsorbent polymer:

C1). The research is focused on the development of new materials and new varieties and the study of chemical properties.

C2). There are a lot of researches on the application of polymer super absorbent resin and other chemical control water saving measures.

C3). The application of fruit trees is mainly focused on the study of transplanting and cultivation of fruit trees, but there is little research on mature fruit trees.