【摘要】 采用田间试验,对强化栽培(SRI)和常规水作(TF)条件下稻田土壤微生物数量、微生物量、土壤酶活性及相关养分含量进行了研究。结果表明:与常规水作相比,强化栽培增加了土壤细菌、放线菌、真菌数量,分别提高了53.1%～173.8%、61.7%～229.4%、10.0%～55.9%,统计差异显著(p<0.05)。强化栽培土壤微生物量碳、微生物量氮比常规水作提高了12.2%～43.6%,22.7%～175.4%,统计差异显著(p<0.05)。与常规水作比较,强化栽培提高了分蘖期土壤脲酶、碱性磷酸酶、转化酶、过氧化氢酶活性,分别为12.6%、30.0%、15.1%、13.8%;强化栽培也显著增加了土壤碱解氮含量,但有效磷含量差异不显著。更多还原

【Abstract】 A field experiment was conducted in 2004 to investigate effects of the system of rice intensification(SRI) on soil biological properties.The treatment was compared with the control(TF,Traditional Flooding) in soil cultureable microorganisms(bacteria,fungi,actinomycetes),microbial biomass C and N,soil enzyme(urease,invertase,alkaline phosphatase,catalase) activity and soil available N and P.Treatment SRI was significantly higher than the control in population of cultureable microorganisms,microbial biomass C and N,regardless of sampling date and 12.6%,30.0%,15.1% and 13.8% higher in activity of urease,alkaline phosphatase,invertase and catalase,respectively at the tillering stage.The treatment was also higher than the control in soil available N,and however,showed no significant difference in soil available.更多还原