Study On The Improvement Of Typical Tobacco Planting Yellow Soil And UAV Monitoring Tobacco Growth In Guizhou Province

Due to the single cropping pattern,high multiple cropping index,long-term application of chemical fertilizers and lack of appropriate fertility measures,etc.,the soil environment deteriorated,soil quality and agricultural productivity decreased,which seriously affected the development of China's tobacco industry?In recent years,there have been many studies on soil amendments in terms of soil improvement,but mostly on traditional soil amendments such as sand,organic fertilizers,and chemical amendments.Although these amendments can improve soil structure to a certain extent,Each of them has certain problems.In view of this,the study used tobacco-planted yellow soils in Guizhou as the research object.Using a combination of greenhouse simulation experiments and field experiments,different proportions of new porous amendments were studied by adding different proportions of new porous amendments.To improve the effect of planting tobacco yellow soil in Guizhou,and to detect tobacco growth through UAV remote sensing technology,in order to obtain rapid tobacco growth data and provide assistance for the evaluation of tobacco.The main results are as follows:1.In the greenhouse simulation test,the addition of a new type of porous amendment can significantly increase the total pores and aeration pores of the soil and reduce the soil bulk density.Test 4 treatments,respectively,CK,T1,T2 and T3,the addition ratio of new porous amendment 0,7.5%,15.0% and 22.5%,respectively.Among them,the treatment with T3 had the best improvement effect.The soil porosity increased the most,the soil total pores and aeration pores increased by 3.2% and 10.6%,respectively,and the soil bulk density decreased by 7.21%.The addition of a new type of porous amendment could improve the ventilation quickly.Performance,reducing soil flooding time,from the CK 130 h to T2 34 h,can provide sufficient oxygen in a short period of time,will not have an impact on crop production.2.In field trials,the addition of amendments is beneficial to the accumulation of soil nutrients,the adjustment of acidified soil,and the improvement of the quality of tobacco leaves,which will help tobacco farmers increase their production and income.The new porous amendment has a porous surface area,can absorb nutrients,reduce nutrient loss,is conducive to the accumulation of nutrients and promote the growth of crops;after adding amendments can effectively improve the composition of the chemical composition of tobacco leaf,tobacco nitrogen,chlorine,restore The indicators such as sugar and nicotine tend to be reasonable,of which the improvement effect with 2B treatment is most prominent;after adding amendment,the yield of tobacco leaves is increased,and the 2014 kg/hm treated by CK increased to 2044 kg/hm and 2133 kg respectively for 1B and 2B./hm,the output value of tobacco lea ves was increased from 45,028 yuan/hm processed by CK to 46,483 yuan/hm and 48,403 yuan/hm respectively for 1B and 2B,with an increase of 3.22% and 7.50% respectively.3.Based on smart 3D software,the UAV aerial images are well processed to generate high-precision 3D models,and the number of tobacco plants,the top position of the tobacco plants,and the plant height are well extracted by the SVM classification method.Among them,the total number of tobacco plants The average prediction accuracy is 94.27%.The total average prediction accuracy of the top position of the tobacco plant is 86.80%.The average prediction accuracy of the plant height of the tobacco plant is 91.81%.The conclusions suggested that the addition of new porous amendment in typical yellow soils of Guizhou can effectively improve the soil aeration pores and increase crop yields;during the monitoring of tobacco growth by UAV remote sensing,the prediction accuracy of tobacco growth parameters is higher,Well completed the monitoring of tobacco growth.