首页  |  本刊简介  |  编委会  |  投稿须知  |  订阅与联系  |  微信  |  出版道德声明  |  Ei收录本刊数据  |  封面
有机物料对紫色土微生物量碳、氮及氮素供应的影响
摘要点击 1654  全文点击 582  投稿时间:2019-01-03  修订日期:2019-03-10
查看HTML全文 查看全文  查看/发表评论  下载PDF阅读器
中文关键词  紫色土  有机物料  微生物碳  微生物氮  氮吸收
英文关键词  purple soil  organic materials  microbial biomass carbon  microbial biomass nitrogen  nitrogen uptake
作者单位E-mail
汪月 西南大学资源环境学院, 教育部三峡库区生态环境重点实验室, 重庆 400715
重庆市农业资源与环境研究重点实验室, 重庆 400716 
wangyue9729@163.com 
张名豪 西南大学资源环境学院, 教育部三峡库区生态环境重点实验室, 重庆 400715
重庆市农业资源与环境研究重点实验室, 重庆 400716 
 
赵秀兰 西南大学资源环境学院, 教育部三峡库区生态环境重点实验室, 重庆 400715
重庆市农业资源与环境研究重点实验室, 重庆 400716 
zxl@swu.edu.cn 
中文摘要
      以猪粪沼渣(PM)、牛粪沼渣(CM)、污泥堆肥(SC)、农村生活垃圾堆肥(RWC1)、农村生活垃圾与污泥的堆肥产物(污泥比例20%,RWC2)为材料,采用培养试验和盆栽试验研究了有机物料对酸性紫色土和石灰性紫色土中微生物量碳(MBC)、氮(MBN)含量及玉米幼苗氮吸收的影响.结果表明,有机物料使酸性和石灰性紫色土MBC含量分别提高了53.63%~102.91%和12.14%~137.00%,有机物料分解愈慢、碳氮比(C/N)愈高,土壤MBC愈大;而MBN含量分别提高了23.37%~150.08%和35.02%~160.02%,受物料的有机氮形态影响.两种土壤MBC/MBN随物料C/N的升高总体降低,高C/N物料有利于MBN的长期维持.除牛粪沼渣外,有机物料均可提高两种紫色土中玉米幼苗的生物量及氮吸收量,提高幅度为SC > PM > RWC2 > RWC1,但其对氮素吸收的促进效果不及化肥.牛粪沼渣对玉米幼苗氮吸收的抑制作用与其较高的C/N有关,而其余物料的促进作用随MBC/MBN降低而增高.因此,有机物料对氮素吸收利用的影响不仅与其性质有关,也与其对土壤MBC/MBN的作用有关.
英文摘要
      An incubation experiment and a pot experiment were carried out to investigate the effects of organic materials on microbial biomass carbon (MBC) and nitrogen (MBN) content, dry weight, and nitrogen uptake of maize seedlings grown in an acidic purple soil and a calcareous purple soil. The organic materials used included pig manure biogas residue (PM), cattle manure biogas residue (CM), sludge compost (SC), compost from rural domestic waste both with and without 20% sludge (RWC1 and RWC2, respectively). The results showed that MBC content in the acidic and calcareous purple soils increased by 53.63%-102.91% and 12.14%-137.00%, respectively. The slower the decomposition of organic materials and the higher the C/N ratio, the bigger the MBC content of the soils. Furthermore, MBN contents, which were affected by the different forms of organic, increased by 23.37%-150.08% and 35.02%-160.02%, respectively. The MBC/MBN contents of both soils decreased with the increase in the C/N ratio of the organic materials, but a higher C/N ratio was beneficial for maintaining a higher MBN content over an extended period of time. With the exception of CM, the addition of organic materials improved the biomass of maize seedlings, and their nitrogen uptake and utilization rate in both soils were also significantly enhanced, although these effects were less than that achieved through conventional fertilization. The uptake and utilization of nitrogen followed the order of SC > PM > RWC2 > RWC1. The inhibiting effect of CM was related to its higher C/N ratio, while the promoting effect of the other materials on nitrogen uptake by the corn seedlings increased as soil MBC/MBN content decreased. Therefore, the influence of organic materials on the change and supply of soil nitrogen was not only related to their properties but also to their effects on soil MBC/MBN content.

您是第51742975位访客
主办单位:中国科学院生态环境研究中心 单位地址:北京市海淀区双清路18号
电话:010-62941102 邮编:100085 E-mail: hjkx@rcees.ac.cn
本系统由北京勤云科技发展有限公司设计  京ICP备05002858号-2