摘要
[目的]探讨不同施肥措施对山东省德州市农田土壤生物学性状的作用效果,为农田土壤的培肥与农作物的合理种植提供理论依据。[方法]通过连续3a的大田试验,研究CK(对照,不施肥)、CF(尿素提供100%的氮)、CM(牛粪提供100%的氮)和CM+CF(牛粪和尿素各提供50%的氮)等处理对德州市农田土壤养分、微生物数量、微生物多样性、活性有机碳及碳库管理指数的影响。[结果]与CF处理相比,CM+CF处理显著提高了农田土壤碱解氮、速效磷、速效钾含量和部分微量元素的有效性,降低了pH值;明显增加了土壤微生物数量与微生物量碳、氮含量,其中细菌数分别较CK,CF和CM处理显著增加91.22%,65.47%和17.11%;同时,CM+CF处理的微生物多样性指数最高,并与微生物总量的变化趋势一致,而CF与CK处理的微生物多样性指数与微生物总量的变化趋势不一致。此外,CM+CF处理的低活性有机碳含量和碳库管理指数亦显著高于其他处理,其中碳库管理指数比CK,CF和CM处理高出69.52,67.84,38.61。与CM+CF处理相比,CM处理对农田土壤的影响效果较小。[结论]牛粪与化肥配施能显著改善德州市农田土壤的生物学性状,有利于提升土壤肥力和增强供肥性。
[Objective]Exploring the effect of different fertilization measures on soil biological characteristics in the farmland of Dezhou City,Shandong Province,in order to provide theoretical basis for the fertilization of farmland and reasonable plantation of crops.[Methods]A field experiment including four treatments,i.e.CK（neither urea nor cattle manure was applied）,CF（100% of nitrogen was provided by urea）,CM（100% of nitrogen was provided by cattle manure）,and CM＋CF（50% and 50% of nitrogen was provided by cattle manure and urea,respectively）was performed.The study was conducted to determine the effects of different treatments on soil nutrients,microbial population,microbial diversity index,active organic carbon and carbon pool management index in the farmland of Dezhou City.[Results]CM＋CF treatment significantly increased available nitrogen,available phosphorus,available potassium and trace element contents,but decreased the pH value in the farmland soil.The microorganism population and contents of microbial biomass carbon and microbial biomass nitrogen were obviously increased by the use of CM＋CF treatment.For bacteria quantity,it increased by 91.22%,65.47% and 17.11%,respectively,as compared with the treatments of CK,CF and CM.Meanwhile,the microbial diversity index was also found having the highest value in the CM＋CF treatment,it had the same variation tendency as total microbial population had.However,the microbial diversity indices and microbial population had different variation tendency between CF and CK treatments.Additionally,the inertly organic carbon content and carbon pool management index in CM＋CFtreatment were also significantly higher than those of other treatments,indicating carbon pool management index increases by 69.52,67.84 and 38.61,respectively,as compared with the treatments of CK,CF and CM.However,less effect on farmland soil in CM treatment was observed in comparison with the one in CM＋CF treatment.[Conclusion]Cattle manure co-applied with inorganic fertilizer coul
出处
《水土保持通报》
CSCD
2017年第5期76-80,85,共6页
Bulletin of Soil and Water Conservation
基金
山东省软科学研究计划"自然资源胁迫下的山东省节约型社会发展模式研究"(2009RKB578)
关键词
农田土壤
牛粪
微生物多样性
活性有机碳
碳库管理指数
farmland soil
cattle manure
microbial diversity
active organic carbon
carbon pool management index
