Behavior and Effect of Quinclorac in Tobacco Soil and Tobacco Leaves
|School||Hunan Agricultural University|
|Keywords||Quinclorac Tobacco crop rotation Enzyme activity Pesticide residues|
With the long - term herbicide use , environmental safety and health hazards. Accumulation of concentrations of herbicides in soil after crop tobacco hazards in recent years more and more serious , more systematic study of this thesis quinclorac residues in tobacco soil degradation in the use of the rice fields and actual soil in detection , as well as their tobacco soil adsorption behavior , migration and transformation process and the impact of the growth of tobacco soil . These studies for future comprehensive and accurate evaluation quinclorac ecological environment security after the smoke of tobacco crop rotation to use to guide farmers scientific and rational use quinclorac important ; effective supervision while tobacco planting , to provide a scientific basis for the purchase of high-quality , high-yielding tobacco and cigarette manufacturer . The main conclusions are as follows , in the field under natural conditions in Qiancha herbicides applied to the soil to the time of the second year of planting tobacco in Hunan Agricultural University experimental field , field degradation experiments . Quinclorac residues detected in the quinclorac the half-life of 43.12 days , slower quinclorac tobacco field soil degradation in the rice fields , and in Hunan multiple impact by injury . Initial found quinclorac there are harmful effects of stubble after tobacco cultivation . Hunan few smoke zone soil adsorption experiments and found that the adsorption medium Hunan soil quinclorac planting tobacco on soil physical and chemical properties affect the the quinclorac adsorption is soil organic matter content . 3 , through the determination of several soil enzymes in tobacco fields , quinclorac on soil enzymes significantly inhibited , so that the soil environment has been destroyed , theoretically proved quinclorac impact on the growth of tobacco tobacco , resulting in abnormalities in the process of growth , yellowing phytotoxicity symptoms .