The Effects Of Four Kinds Of Famland Common Herbicides On The Growth And Physiology Of Zanthoxylum Bungeanum Maxim

Merits of economical,high efficient,betimes and so on, chemical weed control is extensivly applied.The experiment used Four kinds of farmland common herbicides (Fenoxaprop,Clethodim,Glyphosate,Fenoxaprop-p-ethl),MDA content,Leaf cell menbrane permeability,Chlorophyll content were tested under three treaments of different medicaments and combined with the growth index.The results showed:(1) When they were used in normal concentration,growth and the others physiological indexes had obviously different under four kinds of herbicides treatments.According to effects of four herbicides on Zanthoxylum bungeanum Maxim ,the effect of Glyphosate randed first,the rest ones were Clethodim,Fenoxaprop-p-ethl and Fenoxaprop.(2) The influence of Fenoxaprop on the Z.bungeanum.M was little,including Growth,Chlorophyll content,MDA content,Leaf cell membrane.It had evident influences on every indexes about 10 days under three treatments. But influence duration was very short. On the whole,there were not significant difference between three treatments and comparision.(3)the influnces of Z.bungeanum.M growth was obviously different in all treaments.The controlling effect of Sâ…¢(2.5ml/l) was obvious in prophase, they obviously improved,and then it decreased later.At first,Sâ…¡(1.25ml/l) and Sâ… (0.625ml/l) showed influence,then they improved.The effects of three concentrations which had evident influences on different indexes concentrated on 10 days,but at the end of the experiment ,the influences under three concentrations were insignificant.(4) The influences of Feidahong three treatments on all indexes were worse than the others three herbicides.Fâ…¢(6.0g/l),Fâ…¡(3.0g/l)did seriously damage to Z.bungeanum.M and caused its leaves and branches dead.Even destroyment ratio of Fâ… (1.5g/l) on leaf cell membrane was 42.83%.(5) The tendencies of Fenoxaprop and Fenoxaprop-p-ethl on Z.bungeanum.M indexes are similar, but the effects of Fenoxaprop-p-ethl are worse than Fenoxaprop,the probable reason is that the former didn't include a kind of safety agency. The results of experiment indicated Fenoxaprop had small influence on Z.bungeanum.M. we used it safely below 3.0ml/l;Clethodim was used 10 days before when Z.bungeanum.M germinated, concentration was lessen than 1.25ml/l;Fâ…¢,Fâ…¡can greatly inhibit the growth of Z.bungeanum .M ,and we should control concentration below 1.5g/l,at the same time,when using,we should protect seeding;Fenoxaprop-p-ethl should be applied in the normal concentration,and its effect is safe,but the concentration should be below 4.0ml/l.