【摘要】 通过温室花生盆栽试验研究了接种有益土壤动物(蚯蚓和食细菌线虫)对旱地红壤生物学性质(微生物生物量碳氮、基础呼吸、微生物熵、脲酶和酸性磷酸酶活性)、土壤速效养分(碱解氮和速效磷)及花生产量的影响。试验包含4个处理:不接种处理(CK)、仅接种蚯蚓(E)、仅接种食细菌线虫(N)、联合接种蚯蚓和食细菌线虫(EN)。结果表明:①蚯蚓和食细菌线虫均提高了土壤微生物生物量碳氮的含量,线虫对微生物生物量碳的贡献大于蚯蚓。②除花生成熟期的接种蚯蚓处理外,接种蚯蚓和食细菌线虫后土壤基础呼吸均有所增加,且食细菌线虫的影响也大于蚯蚓。③除花生结荚期无显著性差异外,蚯蚓和食细菌线虫均极显著提高了土壤脲酶和酸性磷酸酶活性(P<0.05)。④蚯蚓和食细菌线虫均能增加土壤速效磷和碱解氮含量。⑤接种蚯蚓和食细菌线虫后花生产量的增幅为17%~20%。总之,在4个花生生长时期,相对于不接种的对照处理,接种蚯蚓和食细菌线虫能明显改善红壤性状并最终提高花生产量。更多还原

【Abstract】 A pot experiment was conducted to study how soil animals(earthworms and bacteria-feeding nematodes) impact microbial characteristics(microbial biomass carbon and nitrogen,basal respiration,microbial quotient,urease and acid phosphatase),soil nutrients(available phosphorus and nitrogen) and peanut yield in upland red soil.Four treatments were designed: no inoculation(CK),inoculated earthworms(E),inoculated bacteria-feeding nematodes(N),inoculated earthworms and nematodes(EN).The results showed that: ①Both earthworms and nematodes increased microbial biomass carbon and nitrogen,nematodes contributed more to soil microbial biomass carbon than earthworms;②inoculating soil animal(earthworms and/or nematodes) enhanced soil basal respiration,nematode enhanced more than earthworm,except E treatment in pod filling stage;③ E,N and EN significantly increased soil urease and acid phosphatase activities(P<0.05) except in pod setting stage;④ E,N and EN increased soil available phosphorus and available nitrogen;⑤the increase range of peanut yield was 17% to 20% after inoculating soil animal.In conclusion,inoculation of earthworms and nematodes could improve microbiological characteristics,soil fertility of upland red soil and finally increase peanut yield.更多还原