摘要
旨在研究生物耕作(接种蚯蚓)对土壤微生物区系及细菌生理类群的影响。结果表明,生物耕作能有效提高不同耕层的土壤养分含量和含水量,其中尤以5～20 cm显著,生物耕作处理土壤有机质、全氮、有效磷以及含水量依次比对照增长了58.33%,68.93%,67.06%,16.19%;与常规旋耕(CK)相比,各土层中免耕(T1)和生物耕作(T2)2种保护性耕作方式可明显增加土壤微生物生理类群的数量,且表层(0～5 cm)土壤微生物数量远远大于下层(5～20 cm)。T2处理显著增加了土壤中的细菌和放线菌数量,降低了真菌数量(P<0.05);氨化细菌、硝化细菌以及无机磷分解菌等生理细菌数量得到显著提升(P<0.05)。在传统的农业生态系统中,培育土壤有益动物生物数量可以提高土壤微生物和酶活性,对改善农田土壤肥力有着重要意义。
Field plot experiments were carried out to investigate the effect of biological tillage on soil microbiota and microbial physiologies colony.Three treatments which were conventional tillage（CK）,no tillage（T1） and biological tillage（T2） were set up.The results showed that biological tillage could increase the nutrient contents and the soil moisture content compared with CK,especially in the 5-20 cm layer,in which the contents of soil organic matter,total nitrogen,available phosphorous,and soil moisture content were improved 58.33%,68.93%,67.06% and 16.19%,respectively.The numbers of microbial physiologies colony obviously increased in T1 and T2.The application of maize to soil（T2） gave significantly higher number of bacteria,actinomycete and lower number of fungi（P0.05）,so did the numbers of ammonifier,nitrifier,inorganic phosphorus decomposing microbes（P0.05）.Increasing earthworm activity was contributive to improve soil physicochemical properties and enzyme activities in agro-ecosystem,which was very important in improving soil fertilization.
出处
《华北农学报》
CSCD
北大核心
2012年第B12期339-344,共6页
Acta Agriculturae Boreali-Sinica
基金
国家科技支撑计划后世博专项项目(2010BAK68B18)
上海市科委崇明科技攻关专项(10DZ1960100)
上海市科委科技攻关项目(08DZ1206000)
上海市“星火计划”项目(11dz1913600)
上海市农业科学院青年基金[农青年科技2010(11)]
关键词
生物耕作
蚯蚓
微生物区系
细菌生理菌群
Biological tillage
Earthworm
Microbiota
Bacterial physiological colony
