Copper oxide and cuprous oxide are traditional mineral source pesticides, which have insecticidal, bactericidal, fertilizer, wood preservative and plant growth effects in the field of pesticides. Although copper has a long history as a fungicide and insecticide in the field of pesticides, traditional inorganic copper oxide has a series of problems such as slow absorption and poor effect. At present, copper research mainly focuses on nano copper and photodegradation. Pesticide, organic copper and other aspects.
Technological evolution in the field of fertilizers
Copper is an indispensable trace element for plant growth. Although it is rarely needed, it plays a decisive role. As early as 1931, GB356195A proposed the combination of copper oxide with other compounds to provide fertilizers, insecticides or herbicides. In the following years, copper oxide was also used as a copper fertilizer in the whole nutrient medium. By 1991, CN1053051A proposed the compounding of various nutrients and rare earths to form rare earth fertilizers, which can be used as both a culture medium and a variety of nutrients. In 1997, CN1165802A proposed a multi-functional compound fertilizer technology, which combines fertilizer components such as copper oxide with other preparations (such as fungicides, herbicides, soil amendments, etc.) to obtain different functions. One year, CN1196345A proposed an organic-inorganic formula fertilizer, which is based on soil determination results and the types and requirements of nutrients required to prepare the corresponding fertilizer. This is a fertilizer for soil demand and has epoch-making significance. In 2010, CN101671207A proposed the combination of photosynthetic accelerators, growth regulators, fungicides and micro-fertilizers to promote plant photosynthesis while promoting plant growth, and to promote plant growth and increase yield. In 2015 CN105061084A, a controlled release fertilizer is proposed, which applies controlled release technology to the combination of fertilizer and fungicide/biocide, which can delay the release of active ingredients and play a long-term effect, and can improve the utilization rate of the medicament to a certain extent. Reduce the amount of application.