Variation characteristics of chemical properties and enzymatic activities of banana garden soil under different plant cover
[Objective]By analyzing the soil chemical properties and enzyme activities of banana garden under plant cover,the vaiation char-acteristics of soil quality were clarified,which would provide data support for exploring the combination of land use and land cultivation mode of banana garden.[Method]Using the traditional bare planting pattern without any cover plant as control,natural weeds and artificial plant-ing Macroptilium atropurpureum as the cover plant treatments,the variation characteristics of chemical properties and enzymeatic activities of banana garden soil with plant cover were analyzed based on 3-years field plot location trail.[Result]Plant cover significantly improved soil chemical properties and enzymatic activities(P＜0.05).Compared with control,soil organic matter,total nitrogen,total phosphorus,a-vailable nitrogen and available phosphorus content of soil with artificial planting M.atropurpureum treatment were improved by 51.92％,38.00％,41.86％,20.85％and 29.70％,respectively;The activities of soil sucrase,urease,catalase and phosphatase were increased by 34.19％,50.28％,33.41％and 101.54％,respectively.Plant cover could significantly and effectively improve the soil organic matter,alkali hydrolyzable nitrogen and available phosphorus content of banana garden soil within one year,while the effect of plant cover on total ni-trogen and total phosphorus content took more than two years to show significant difference;The results of principal component analysis showed that artificial planting M.atropurpureum treatment had a more significant effect on soil enzyme activity than that of natural weeds treat-ment.[Conclusion]Compared with the traditional bare planting pattten,the two cover plant treatments significantly increased the soil chemi-cal properties and enzymatic activities of banana garden,moreover artificial planting M.atropurpureum treatement had a better effect on soil improvement than natural weeds.The wide-narrow-row planting pattern combined with legume cover treatment could effectively improve the soil quality,which would be a technical model for healthy and sustainable development in banana industry in dry-hot valley region of Yunnan province.
Plant coverBanana gardenSoil chemical propertiesSoil enzymatic activities
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