菌肥对盐碱地土壤特性及燕麦根系分泌物的影响

发布时间：2019-06-28 21:00

【摘要】：以耐盐碱性不同的燕麦品种内燕5号和白燕2号为材料,研究施菌肥和不施菌肥(对照)两种措施对盐碱地土壤理化、生物学指标和燕麦根系分泌物的影响。结果表明,施菌肥可以提高燕麦根际与非根际土壤中可溶性糖和草酸含量,根际土壤中可溶性糖、草酸、苹果酸含量均高于非根际土壤;各处理有机酸含量与根区(水平0~5cm、垂直0~10cm)土壤微生物生物量氮含量、蔗糖酶活性均呈极显著正相关;施菌肥可降低两个燕麦品种根区土壤pH和电导率,也可有效提高土壤含水量、微生物生物量及土壤酶活性;各处理间燕麦根区土壤pH和电导率呈极显著正相关,土壤含水量与土壤微生物生物量氮含量及土壤酶活性间均表现出显著或极显著正相关关系。
[Abstract]:The effects of applying bacterial fertilizer and not applying bacterial fertilizer (control) on soil physicochemistry, biological indexes and root exudates of oats in saline-alkali soil were studied by using oat varieties Neiyan 5 and Baiyan 2 with different salt and alkali tolerance as materials. The results showed that the contents of soluble sugar and oxalic acid in rhizosphere and non-rhizosphere soil were increased, and the contents of soluble sugar, oxalic acid and malic acid in rhizosphere soil were higher than those in non-rhizosphere soil, and the content of organic acid was positively correlated with the content of microbial biomass nitrogen and sucrase activity in root zone (horizontal 0 cm, vertical 0~10cm), and the content of soluble sugar, oxalic acid and malic acid in rhizosphere soil was significantly higher than that in non-rhizosphere soil. Application of bacterial fertilizer could reduce soil pH and electrical conductivity, and also effectively increase soil water content, microbial biomass and soil enzyme activity. There was a very significant positive correlation between soil pH and electrical conductivity in root zone of oatmeal, and there was a significant or very significant positive correlation between soil water content and soil microbial biomass nitrogen content and soil enzyme activity.
【作者单位】：内蒙古农业大学农学院;
【基金】：内蒙古自治区主席基金项目内蒙古自治区重大科技专项内蒙古自治区“草原英才”创新团队项目内蒙古自治区科技创新团队项目全国农业科研杰出人才及其创新团队项目现代农业产业技术体系建设专项(CARS-08)
【分类号】：S144;S512.6

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