河南南阳烟区不同类型土壤的根际和非根际微生物及酶活性变化

Change of Different Soil Types on Microorganisms and Enzyme Activity of the Rhizosphere and non-Rhizosphere of Nanyang Tobacco Growing Area in Henan Province

以南阳烟区5种类型土壤为研究对象,研究了不同类型土壤对根际和非根际微生物主要类群和主要酶活性的影响及其相互关系。结果表明:不同类型根际和非根际土壤微生物数量、酶活性均表现出差异性,根际土壤微生物数量、酶活性均高于非根际土壤,黄棕壤根际土中细菌和解磷菌数量最多;黄红壤根际解钾菌和氨化细菌数量最多;暗棕壤根际土好气性自生固氮菌和芽孢杆菌数量最多。潮土根际和非根际土过氧化氢酶和脲酶活性均最高;暗棕壤根际和非根际土蔗糖酶活性最高。由相关分析可知根际和非根际土壤微生物数量、酶活性之间关系密切。综合分析认为,黄棕壤可以改善土壤环境,有效防止植烟土壤退化。

With the five soil type of Nan yang tobacco growing area as test materials,Effects of different soil type on changes of main microbial strain amounts and enzymes activities in rhizosphere and non-rhizosphere soil have been investigated.The results showed that the difference of microorganism quantity among different rhizosphere and non-rhizosphere types of soil is significant,soil the enzyme activity.Rhizosphere soil microorganism quantity and enzymes activity are higher than non-rhizosphere soil.The bacteria and phosphorus bacteria in rhizosphere yellow brown soil were higher than that of other four soil types.The potassium bacteria and ammonifier in rhizosphere yellow clay soil were highest.The Aerobic azotobacter and bacillus in rhizosphere black brown soil were highest.The Catelase and urease in rhizosphere and non-rhizosphere Shajiang yellow soil were highest.The Sucrase in rhizosphere and non-rhizosphere black brown soil were highest.Correlation analysis showed that soil microorganism quantity and enyme activity might be closely correlated in rhizosphere and non-rhizosphere soil.In summary,yellow brown soil can improve soil condition,and to prevent soil fertility of tobacco-planting soils from degradation.