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| Effects of Soil Fumigation，Microbial Agents and Combined Application of Different Fertilizers on Pepper Continuous Cropping Obstacle in Greenhouse |
| WANG Jinming1，DONG Kongjun2* |
| 1Jingyuan County Agricultural Technology Extension Center of Gansu，Baiyin 730699，Gansu，China；2Crop Research Institute，Gansu Academy of Agricultural Sciences，Lanzhou 730070，Gansu，China |
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Abstract Through setting up 7 treatments on soil in solar greenhouse with continuous cropping obstacles including high potassium compound fertilizer + organic fertilizer + EM（FYEM），soil fumigation + EM（XEM），soil fumigation + organic fertilizer + EM（XYEM），soil fumigation + farm manure + EM（XNEM），soil fumigation + straw + EM（XJEM），blank contrast（CK1）and local traditional fertilization（CK2），this study evaluated their effects on pepper biological characters，biomass，yield，soil pH and soil-borne diseases occurrence．The results showed that FYEM treatment had better performance in pepper plant height，stem diameter and biomass，etc.，but in yield formation aspect FXEM treatment reached the highest 91 585.5 kg · hm-2，followed by FYEM treatment 88 428.0 kg · hm-2．Their yields were increased by 11.8% and 8.0% comparing with CK2，and increased by 43.8% and 38.9% comparing with CK1，respectively．The soil pH value of each treatment ranged from 8.28-8.35．The combined application of soil fumigation and microbial agents had obvious inhibitory effect on the occurrence of pepper blight．At fruit-setting stage the control efficiency of XYEM was the highest，reaching 65.17%．Comprehensive analysis indicated that adopting metham-sodium to conduct soil fumigation treatment combined applying organic fertilizer and EM agent could promote pepper growth and increase its yield．The occurrence of blight could be effectively reduced，and pepper continuous cropping barrier in greenhouse was relieved．
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Received: 17 March 2022
Published: 11 April 2022
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