摘要
2009年10月在冀蒙农牧交错带选取3个样地,从柠条(Caragana korshinskii Kom.)根围0～10 cm、10～20 cm、20～30 cm、30～40 cm和40～50 cm 5个土层分别采集土壤样品,研究了丛枝菌根真菌的空间分布及其与土壤酶活性和土壤养分的关系。结果表明,不同样地和土层深度对丛枝菌根各结构真菌定殖率和孢子密度有显著影响。菌丝、泡囊、丛枝定殖率和孢子密度最大值均出现在0～20 cm土层。菌丝定殖率和脲酶活性呈极显著正相关,泡囊定殖率和孢子密度与脲酶、碱性磷酸酶、酸性磷酸酶活性呈极显著正相关。孢子密度与各土壤养分因子均呈极显著正相关。说明在冀蒙农牧交错带柠条能与丛枝菌根真菌形成良好的共生关系,丛枝菌根不同结构和孢子密度有助于土壤状况的监测和评价。
The spatial dynamics of arbuscular mycorrhizal(AM) fungi and its relationship with soil fertilities and soil enzymes were surveyed at three sites located in farming-pastoral zone at Hebei province and Inner Mongolia.Soil samples in the rhizosphere of Caragana korshinskii Kom.were collected at 0～10 cm,10～20 cm,20～30 cm,30～40 cm and 40～50 cm depth in October 2009.The results showed that AM fungal colonization and spore density had significant difference among three sites and soil depths.Hyphae,vesicle,arbuscule colonization and spore density were the highest at 0～20 cm soil layer.Correlation analysis showed that hyphal colonization had significantly positive correlation with soil urease.Spore density and vesicular colonization had significantly positive correlation with soil urease,alkaline phosphatase and acid phosphatase.There was significantly positive correlation between spore density and soil fertility factors.The results suggested that AM fungi could form strong symbiotic relationship with C.korshinskii,thus arbuscular mycorrhizal structures and spore density were useful indictors for monitoring and evaluating soil environment.
出处
《湖北农业科学》
北大核心
2013年第3期538-541,共4页
Hubei Agricultural Sciences
基金
国家自然科学基金项目(30670371)
保定市科学技术研究与发展指导计划项目(11ZN032)
