Effct Of Different Herbicides On Weeds In Millet Field And Their Effects On Growth And Development Of Broomcorn Millet

Broomcorn millet is one of the minor grains.The seed of broomcorn millet is rich in starch,protein,fat,cellulose,minerals,and nutrition.With the improvement of people’s dietary structure,special nutrition such as broomcorn millet and grains has become the focus of attention,and the market has a promising outlook for consumption.However,at present,the degree of mechanization of planting on gardenia is low,and the production efficiency is low when the planting time and the fee for weeding are reduced.In order to better serve the industry development of weeds and reduce the damage of weeds in the field,we selected 22herbicides commonly used in cereal crops to investigate the effects of different herbicides on field weed control and their effects on growth and development of broomcorn millet.The main findings are as follows:(1)Herbicides have different effects on seed germination and seedling growth of broomcorn millet,of which the effect of soil-closed herbicide Butachlor and stem and leaf herbicide Two nail and four sodium chloride is relatively small.The growth of the main root and the growth of the seedlings were significantly inhibited by the closure treatment of the soil.The elongation of the main root of the broomcorn millet and the formation of the secondary root were significantly inhibited after the spraying of isopropane.(2)Butachlor,bimoximine,atrazine,and valleys in the soil-closed herbicide were sprayed on the broom corn millet after spraying with Tau,Gimi,kuomanfei,broadma,benzazole and two methyl sodium in the stem and leaf herbicides.The other herbicides show different degree of drug damage.(3)All the herbicides have a certain control effect on the weed in the field.The herbicidal effect of soil-closed herbicide is better than that of the stem and leaf herbicide,but the herbicide has a different degree of inhibition on the height of the plant,the number of tillers,the SPAD value of the functional leaves and the ear weight per plant,and the leaf area and seed of the functional leaves.The effect of 1000 grain weight is relatively small.Compared with the artificial weed control,all the herbicides in the experiment resulted in a decrease in the yield of the millet,but compared with the control of no weed control,some herbicides had an increase in yield.Among them,the weed control effect of atrazine,Gu You,Butachlor and bimazolamine was better in soil-closed herbicide,and the yield increased by 60%more than that of no weed control and less than 10%by artificial weed control,and the weed control effect was better in stem and leaf herbicides.The weed control effect of all growth stages reached over 80%,and the yield of broomcorn millet increased by more than 50%compared with that without weed control,and the rate of artificial weeding reduction was less than 15%.(4)Compared with manual weeding,spraying different dosages of different herbicides resulted in different yield reduction of broomcorn millet but increased significantly compared with no weeding.Compared with no weed control,the yield increased obviously when the concentration of soil-closed herbicide Atrazine was 3.3-3.7 L/hm~2 and the concentration of Guyou was 2.0-2.4 kg/hm~2 and the application concentration of the stem and leaf herbicide Kuoshima was 0.225-0.450 kg/hm~2,and the spraying concentration of Benzazole two a sodium was 0.150-0.600 kg/hm~2.The effect of different herbicides on weeds at different spraying concentrations had a certain effect on weeds.When the spraying concentration of soil-closed herbicide Guyou was 2.4 kg/hm~2 and Atrazine was 3.5 kg/hm~2,the control efficiency of weeds was more than 90%.The spraying concentration of the stem and leaf herbicide in the spraying concentration of Kuoshima(0.450 kg/hm~2)and Benzazole two a sodium was 70%Weeds control effect was relatively good when 0.15 kg/hm~2 was used,and the control effect was over 70%.In the comprehensive analysis of the yield of broom corn millet and the effect of weeding,Atrazine(atrazine,38%atrazine)or Guyou 2.4 kg/hm~2(mono pyrimonon)is recommended,and the soil sealing treatment is done before the seed is seeded after the seed is seeded.It was possible to spray the Kuoshima(3.6%two sulfonated methiodion 0.450 kg/hm~2)or Benzazole two a sodium(55%benzazole two a sodium 0.150 kg/hm~2)before and after the leaf three leaf period.