Screening Of Suitable Soil Amendments To Alleviate The Obstacle Of Atractylodes Macrocephala Continuous Cropping

From 2018 to 2019,the experiment was carried out on the land with continuous cropping one year of Atractylodes macrocephala of Dafang County,Guizhou Province.The quicklime,humic acid granule fertilizer and Loosening soil essence were selected as soil amendments.Analyse effects of Add different soil amendments to linked soils in continuous cropping soi on plant height,stem diameter,leaf SPAD value,soil enzyme activity,soil chemical properties,soil microorganism,rate of occurrence of southern blight and root rot,accumulation of dry matter and nutrient,yield and quality.Inquire into the mitigation effects of three soil amendments on Atractylodes macrocephala continuous cropping obstacle,and screening suitable soil amendment to relieve the obstacle of Atractylodes macrocephala continuous cropping.The following main results were obtained:?1?Adding soil amendment can increase the root soil S-ACP activity of Atractylodes macrocephala.And,adding quicklime or humic acid particle fertilizer alone can making soil S-UE activity reduce first and then increase.The contents of total phosphorus,available phosphorus and available potassium in the root soil of Atractylodes macrocephala could be increased by adding quicklime,humic acid granule fertilizer or Loosening soil essence alone.Adding quicklime or humic acid particle fertilizer alone can increase soil p H.Mixed and addition three kinds of soil amendments can increase the total phosphorus content of soil.After continuous cropping Atractylodes macrocephala,the number of soil fungi increased significantly,and the number of actinomycetes and bacteria decreased.The addition of soil modifier can significantly reduce the number of soil fungi and increase the number of soil actinomycetes and bacteria in the root of Atractylodes macrocephala.It can alleviate the continuous cropping obstacle of Atractylodes macrocephala.Adding quicklime or humic acid granule fertilizer alone can relieve the obstacle of Atractylodes macrocephala continuous cropping at 300 kg/ha.The mitigation effect of the A₂B₂C₃treatment?Quicklime 300 kg/ha,Humic acid granular fertilizer 300 kg/ha,Loosening soil essence 18 kg/ha?is better when the soil modifier is mixed and added.?2?Adding the Loosening soil essence alone can raise the stem coarseness of Atractylodes macrocephala.of which,60 days after transplanting of Atractylodes macrocephala.The ratio of stem diameter of T₃treatment?18 kg/ha?was significantly increased by 29.80%than CK.The application of quicklime or humic acid granule fertilizer alone can raise the plant height.Mixed and addition three kinds of soil amendments could improve the stem diameter of Atractylodes macrocephala.?3?The rate of occurrence of southern blight of continuous cropping Atractylodes macrocephala was increased with the increase of time after transplanting,while the rate of occurrence of root rot was increased first and then decreased with the increase of time after transplanting.Adding soil modifier can significantly reducerate of occurrence of southern blight and root rot of Atractylodes macrocephala.The best treated is T₂?Loosening soil essence 9 kg/ha?in Loosening soil essence which effect on the occurrence of southern blight and root rot of Atractylodes macrocephala.The best addition is 300kg/ha in quicklime or humic acid granule fertilizer.The best treated is A₂B₂?Quicklime 300 kg/ha,Humic acid granular fertilizer 300 kg/ha?when mixture adding of quicklime and humic acid granular fertilizer.At after stranplanting of 120 and 150 days,compared with CK,the southern blight reduced respectively by46.42%,61.97%,and root rot reduced respectively by 97.62%,91.67%.Mixture adding of quicklime,humic acid granule fertilizer and Loosening soil essence,At after stranplanting of 180 and 210 days.The best treated is A₂B₂C₃?Quicklime 300 kg/ha,Humic acid granular fertilizer 300 kg/ha,Loosening soil essence 18 kg/ha?which effect on the occurrence of southern blight and root rot of Atractylodes macrocephala.Compared with CK,its southern blight reduced respectively by 46.56%,49.57%,and root rot reduced respectively by 61.33%,50.72%.?4?Adding soil modifier can increase the amount of dry matter accumulation of Atractylodes macrocephala.It can also increase the accumulation of nutrients in continuous cropping Atractylodes macrocephala.When 9 kg/ha of application amount,the amount of dry matter accumulated in Atractylodes macrocephala was the highest,19.95%higher than CK.And when the application amount of humic acid granule fertilizer was 600 kg/ha,the amount of dry matter accumulation was the highest.30.88%higher than CK.However,there was no significant effect on the nutrient accumulation of Atractylodes macrocephala.At suitable application is 600 kg/ha,the highest accumulation of nutrients of continuous cropping Atractylodes macrocephala.Under the condition of mixed addition of three kinds of soil amendments,the amount of dry matter accumulated in A₃B₁C₃treatment?Quicklime 600 kg/ha,Humic acid granular fertilizer 0 kg/ha,Loosening soil essence 18 kg/ha?was the highest,which was 44.80%higher than that in CK.The highest total accumulation of nitrogen,phosphorus and potassium was A₃B₂C₁treatment?Quicklime 600 kg/ha,Humic acid granular fertilizer 300 kg/ha,Loosening soil essence 0 kg/ha?,and the value was0.334 g/plants,which was 72.16%higher than the CK.?5?Adding quicklime or pine soil essence alone can significantly increase the fresh weight,seedling rate and yield of single plant of Atractylodes macrocephala.Adding humic acid granule fertilizer alone can significantly increase the seedling rate and yield of Atractylodes macrocephala.Application quantity of quicklime and humic acid particle fertilizer is 300 kg/ha,Atractylodes macrocephala had the highest yield.The yield was the highest of quicklime and humic acid granule fertilizer with the application amount of 300 kg/ha,which significantly increased by 291.04%and96.39%respectively compared with CK.The yield of Atractylodes macrocephala was the highest,when the application rates is 9 kg/ha of loose soil essence,which significantly increased by 128.93%compared with CK.The yield of quicklime and humic acid particle fertilizer combined with A₂B₂treatment?Quicklime 300 kg/ha,Humic acid granular fertilizer 300 kg/ha?was the highest,361.33%higher than that of CK,When quicklime,humic acid granular fertilizer and Loosening soil essence were mixed,the yield of A₂B₂C₃treatment?Quicklime 300 kg/ha,Humic acid granular fertilizer 300 kg/ha,Loosening soil essence 18 kg/ha?was the highest,which was124.31%higher than CK.Single application of quicklime,humic acid granule fertilizer and Loosening soil essence can increase the leaching substance content of Atractylodes macrocephala.The mixed application of quicklime,humic acid granule fertilizer and turpentine essence can reduce the water content of Atractylodes macrocephala,and increase the leaching substance content from Atractylodes macrocephala.Single or mixed,the quality of Atractylodes macrocephala was the best.when the application rates is 300 kg/ha of quicklime and humic acid particle fertilizer.?6?The results show that,in this test area,when soil amendments were added alone,the best soil amendment for relieving Atractylodes macrocephala is quicklime,and the suitable application is 300 kg/ha.Under the condition of mixed addition of quicklime and humic acid granular fertilizer,A₂B₂treatment?Quicklime 300 kg/ha,Humic acid granular fertilizer 300 kg/ha?was the best to relieve the continuous cropping obstacle of Atractylodes macrocephala.The best mitigation effect is A₂B₂C₃treatment?Quicklime 300 kg/ha,Humic acid granular fertilizer 300 kg/ha,Loosening soil essence 18 kg/ha?when three kinds of soil amendments were added in combination.