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| Effects of Biological Fertilizer Applications on Banana Wilt Disease and Soil Microorganisms |
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| KeyWord:biological fertilizer; banana wilt disease; soil microorganism; soil enzymes |
| Author Name | Affiliation | | DING Wen-juan | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China | | CAO Qun | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China | | ZHAO Lan-feng | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China | | LIU Xiao-feng | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China | | LIU Ying | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China | | YANG Pan-pan | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China | | LI Hua-xing | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China |
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| Abstract: |
| Banana Fusarium Wilt, a soil borne diseases caused by a fungus, has severely affected banana production. Under field conditions, the effects of biological fertilizer on Banana Fusarium Wilt and soil microorganisms were studied using a completely randomized block design. At basal and vegetative stages, applying biological fertilizer combined with chemical fertilizer obviously promoted banana growth, leading to greater stem diameter, blade width and yields of banana after 270 d of transplanting than at other growth stages. When processed in BOF2, the average output of banana per district was up to 288 kg, significantly higher than the rest treatments. Applying biological fertilizer during vegetative period significantly reduced the occurrence of banana wilt and delayed the onset of banana wilt. Compared with the chemical fertilizer control, the disease index was decreased by 54% by biological fertilizer applied at vegetative growth stage. Application of biological fertilizer at the basal stage improved the population of soil bacteria and actinomycetes, but reduced that of fungi. Soil catalase, invertase, urease and acid phosphatase activities were all improved by biological fertilizer. The disease index was significantly negatively correlated with the number of both bacteria and actinomycetes in soil, but significantly positively with the number of fungi in soil. The findings suggest that application of biological fertilizer at banana vegetative period could improve soil microorganism structure, promote soil enzyme activities, and reduce and/or delay banana wilt disease occurrence. |
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