Study On The Application Of Ecologically-based Weeds Control Model In Tea Plantation

Weeds control is a difficult problem in the management of young tea plantation and unsealed tea plantation.Traditional manual weeding can not meet the needs of modern agricultural production due to time-consuming,laborious and labor-intensive.Although chemical weeding has the characteristics of good control effect,low cost and high efficiency,there are some problems such as pesticide residue,environmental pollution and food safety.It is of great significance to explore the effects of different agricultural measures on weeds control and ecological effects by using ecological principles.In this experiment,plastic film,horticultural fabric,straw and Vulpia myuros C.Gmelin were used as experimental materials to explore the control effect of mulching and intercropping on weeds in tea plantations,and to evaluate the ecological effects of different materials.The conclusions were as follows:1.Mulching and intercropping can effectively control weeds.Mulching horticultural fabric and intercropping Vulpia myuros were the best for weed control after one year of treatment,the plant control effects were 92.1%and 88.7%,respectively,and the biomass control effects were 92.3%and 89.3%,respectively.2.In the summer high temperature weather,plastic film,horticultural fabric covering have a heating effect.Especially plastic film,in the 10 cm soil layer,the average soil temperature is 4.4 ℃ higher than the control treatment,which may cause the tea tree roots to be damaged by high temperature.Mulching rice straw and intercropping Vulpia myuros had a good cooling effect,especially for the 10 cm soil layer,and the average temperature is 3.4℃ and 2.2℃ lower than the control treatment.In the winter low temperature weather,plastic film,horticultural fabric,rice straw and Vulpia myuros have a heat preservation effect on the soil,especially for the 5 cm soil layer,the soil temperature is 3.4 ℃,3.5 ℃,2.4 ℃ higher than the control treatment.3.Covering plastic film,horticultural fabric,rice straw and intercropping Vulpia myuros can increase the water content of the surface soil of tea plantation.The average water content in 0-20 cm soil layer is 15.2%,13.2%,12.7%,12.7%higher than that of control treatment,respectively..4.Covering plastic film and horticultural fabric can increase the soil bulk density and soil compaction of 0-10 cm soil layer.Covering straw and intercropping Vulpia myuros can reduce the soil bulk density and compactness of tea garden,especially 0-10 cm soil layer.Mulching and intercropping can improve the soil fertility,especially mulching straw and intercropping Vulpia myuros.Covering straw and intercropping Vulpia myuros can significantly increase soil urease,catalase and invertase activities.Intercropping Vulpia myuros is the best for improving the physical and chemical properties of tea plantation soil.5.Mulching and intercropping can promote the germination and growth of tea plants.Covering straw and intercropping Vulpia myuros can significantly increase tea yield and quality(P<0.05).The budding density increased by 33.3%and 29.5%,respectively,and the amino acid content was 25.3%and 10.2%higher than that of control treatment,respectively.Covering horticultural fabric could increase the yield of tea,but for tea the quality effect is not significant;Covering plastic film does not increase the yield,and even reduces the quality of the tea.