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本研究以柑橘为研究对象,对柑橘土壤pH、电导率、有机质含量、铵态氮含量、速效磷含量、速效钾含量、葡聚糖苷酶活性和多酚氧化酶活性进行了测定与分析,阐述了以耐盐性芽孢杆菌制作的菌肥对盐胁迫下柑橘土壤理化性质和酶活的影响,分析了土壤理化性质与酶活的相关关系.结果表明:在盐胁迫下,当菌肥和复合肥配合施加时,土壤铵态氮、速效磷和有机质的含量以及葡聚糖苷酶的活性较高,而土壤的电导率较低,有利于柑橘的生长.主成分分析表明:配合施加菌肥和复合肥的处理其效果较好,效果持续时间较长.从不同时间采集的土壤的综合评价来看,7月22日单独施加复合肥的处理,其综合得分最高为1.31.其他三个采样时间的菌肥和复合肥配合施加的处理的综合得分最高;复合肥单独施加的处理其综合得分持续下降.Spearman相关性分析和回归分析表明,在盐胁迫下,土壤电导率与速效磷含量呈极显著正相关;电导率与速效钾含量呈极显著正相关.
Abstract：In the report, citrus were used as research objects to determine the pH, conductivity, organic substances content, ammonium nitrogen, available phosphorus, available potassium and polyphenol oxidase of citrus soil. The effects of application of microbial fertilizer from salt tolerant bacillus on physicochemical properties and enzyme activities in citrus soil under salt stress were determined. The correlation between soil physical and chemical properties and enzyme activity was analyzed. The results showed that under salt stress, the contents of ammonium nitrogen, available phosphorus, organic matter and glucosidase in soil were higher, and the soil conductivity was lower. And the principal component analysis results showed that the combined treatment effect of bacterial fertilizer and compound fertilizer was better and the lasting effect was longer. From the comprehensive evaluation of soil collected at different time points, the highest comprehensive score of compound fertilizer treatment was 1.31 on July 22. The combined scores of the fertilizer and compound fertilizer at the other three sampling times were the highest, while the combined scores of compound fertilizer alone continued to decrease. The results of Spearman correlation analysis and regression analysis showed that under salt stress, the soil conductivity was significantly positively correlated with available phosphorus content. The conductivity was positively correlated with the content of available potassium.
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基本信息:
DOI：10.15886/j.cnki.hdxbzkb.2020.0031
中图分类号:S666;S153
引用信息:
[1]邓大豪,李得铭,翟子翔等.盐胁迫下菌肥对柑橘土壤理化性质和酶活的影响[J].海南大学学报(自然科学版),2020,38(03):226-232.DOI:10.15886/j.cnki.hdxbzkb.2020.0031.
基金信息:
海南省自然科学基金创新研究团队项目(2017YFD020060206);; 2019年海南省基础与应用基础研究计划(自然科学领域)高层次人才项目(2019RC283);; 国家重点研发计划(2017YFD020060206)