The Preparation Of A Novel Environmentally Friendly Maize Seed Coating Agent

A novel environmental friendly maize seed coating agent is made in this study, combining the carboxymehyl chitosan which is a kind of natural nontoxic polymer and with the traditional chemical fungicides. The toxicity of the novel seed coating agent has been decreased while the drug effect has been kept even and the fertility has been enhanced. Through the laboratory test and field trial, the anti-fungicide ability, the field seed emergence rate and seedling rate, the effect with the growth, development and product of the plant have been studied. And by the study of the effect of different seed coating proportion, the optimal proportion has been determined. Meanwhile, the function mechanisms of the fungicides and anti-fungicide have been analyzed in this study. The results of the study are as follows:1, Through the laboratory test, the best fungicides have been screened out, the triazole alcohol and tebuconzole, and the optimal ratio (G:G) of triazole alcohol and tebuconzole is 6:4. Then compound the carboxymehyl chitosan with the triazole alcohol and the tebuconzole, and the optimal ratio (G:G) is 100:6:4.2, Though the mensuration of the germinate energy (GE) and germinate ratio (GR), the best active ingredients have been screened out: fertilites, microelements and mothproot agent. The optimal ratio of these components (G:G) is: 1% carbamide : 1%K₂HPO₄: tiny fertility G : 2% molybdenumacide sodium : borax : 1%ZnSO₄ : 1%CaCl₂ : BT=10 : 4.0 : 0.6 : 0.8 : 0.6 : 2.0 : 2.0 : 12.0.3, Though the mensuration of the physical performances such as: viscidity, characteristic of shaping into film, evenness of seed coating, ratio of drop, low temperature stability and etc., the addictives have been screened out (thickening agent, film forming agent, antifreezer, acidity regulator and warming coloration). And the optimal ratio (G:G) of all the additives is yellow glue : additiveA : glycol : 2%NaOH : purple liquid=0.1 : 5.6 : 3.0 : 5.0 : 3.3.4, 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..5, Lab. test, field trial effect experiments and security mensuration experiments for maize seedling period are done with test sample of the novel environmental friendly seed coating agent. Security mensuration indicates that the novel seed coating agent is safe for maize seeding and the maize production is increased evidently. Remedy effect test proves that the maize smut can be controlled more preferably than the traditional seed coating agent Jinong 4#. And the optimal ratio of seed to seed coating agent is 1 : 50. This study indicates that the novel environmental friendly seed coating agent is a seed coating agent of new type with better effect, lower toxicity and fewer leftover, which has enriched seed coating agent variety of our country.