Preparation And Application Of A Novel Environmentally Friendly Wheat Seed Coating Agent

Seed coating agent is made up of pesticides,fungicides,micro-fertilizer,plant growth regulators,film-agent,antifreeze and other additives,which can form a protective layer of membrane on the surface of seed.It can prevent and control soil pests,seedling diseases and improve seed germination rate,and promote the healthy growth of buds,increase crop yields and improve crop quality.However,the major components of traditional seed coating agent are the original drugs partly which are highly toxic pesticides.Although these seed coating agent have played a role on the improvement of food production in some degree,human beings and environment are faced with harms and pollution.In this study,the main active ingredient of seed coating agent is a non-toxic natural polymer carboxymethyl chitosan,which can reduce the toxicity of traditional seed coating agent and maintain the same effect and improve the fertility. Through laboratory and field tests,to validate the germination tendency,the germination rate,the rate of inhibition,as well as field production,at last,we set the best formulations of wheat seed coating agent.At the same time,make analysis of the main mechanism of carboxymethyl chitosan and so on.The results of the study are as follows:1.Through set outing the physical properties of film-agent,viscosity,coating uniformity, the solid rate of seed coating and so on,make the determination of the type of assist-agent and content:CMC-Na 4.0%,amino acid 4.0%,thickener Huang Yuanjiao 2.0%,TX-10 1.0%, CMC 2.0%,antifreeze ethylene glycol 2.0%,acidity regulator 1.0%NaOH 5.0%,purple pulp 3.0%.2.According to the standard of the pesticide line of our country,combining with the characteristic of this seed coating agent,all the indexes of quality have been determined such as: appearance,pH value,viscidity,film forming agent,antifreezer,acidity regulator and warming coloration and etc.3.Making a field experiment of seed coating agent,it had showed that the product could effectively control sheath blight of wheat and advance wheat facilitate the tiller greatly,raise the ear of wheat,it increase by about 48%than the blank production,enhance by about 40%than the tradition ones lastly.4.Through summing up indoor and field experiments,make out analysis mechanism of natural polymeric amylase in disease prevention and high-yield increasing of crops.And discuss specific functions of a wide range of fertilizers and trace elements in enhancing the resistance of crops and promoting the growth of crops.5.The innovation and the characteristics of this thesis are:first,because of using the natural non-toxic polymeric amylase which instead of toxic components of sterilization in traditional seed coating agent,thus reduce the dangers of humans and animals and the environment greatly. Second,adding other active ingredients in environmentally seed coating agent,that can contribute the wheat tiller significantly and increase the final production of wheat,which is unmatched by the traditional seed coating agent.