检索结果-南通市图书馆

Soil Respiration, Microbial Biomass and Nutrient Availability in Soil After Addition of Residues with Adjusted N and p concentrations

引用

pedosphere 2017年第1期27卷 76-85页

作者： Trung Ta NGUYEN petra MARScHNER School of Agriculture Food and Wine The University of Adelaide Adelaide 5005 (Australia)

Microbial activity and nutrient release are known to be influenced by organic matter properties,but it is difficult to separate the effect of c/N ratio from that of c/p ratio because in most plant residues both ratios are either high or *** incubation experiment was conducted to investigate the effects of reducing the c/N and c/p ratios of slowly decomposable plant residues(young eucalyptus leaves,mature wheat straw,and sawdust) to those of rapidly decomposable residues(young kikuyu shoots) on soil respiration,microbial biomass,and N and p *** c/N and c/p ratios of the former were adjusted to 15 and 89,respectively,by adding N as(NH_4)_2SO_4,p as KH_2pO_4 or both and residues were added at 10 g c kg-1 to a silt *** respiration was measured over21 d;microbial biomass c(MBc) and available N and p were measured on days 0,7,and *** to the unamended soil,addition of kikuyu increased cumulative respiration 20-fold,MBc concentration 4 to 8-fold,and available p concentration up to4-fold,whereas the increase in available N concentration was small and *** respiration and MBc concentration were low in the sawdust-amended soil and were not influenced by reducing the c/N and c/p *** respiration with original wheat and eucalyptus was 30%-40%of that with *** the c/N ratio alone or both c/N and c/p ratios increased cumulative respiration and MBc concentration 2-fold compared to the original wheat and eucalyptus,whereas reducing the c/p ratio had little *** the experiment,the available N concentration after addition of residues with reduced c/N ratio increased in the following order of eucalyptus pendently lowering the c/N and c/p ratios,microbial activity was more limited by c and N than ***,lowering the c/N ratio of very slowly decomposable sawdust had no effect on soil respiration and MBc concentration,suggesting that other properties such as concentration of poor

关键词： c/N ratio c/p ratio microbial activity nutrient immobilisation nutrient mineralisation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

changes of Soil Microbial Biomass c and p During Wheat Growth After Application of Fertilizers

引用

pedosphere 1997年第3期7卷 225-230页

作者： SHEN QIRONG WANG YAN cHEN WEI and SHI RUIHE Nanjing Agricultural University, Nanjing 210095 china) Nanjing Agricultural University Nanjing 210095 China

A pot experiment was carried out with a clay loam in a green house. The results showed that soil microbial biomass c increased with the application of organic manure at the beginning of the experiment and then gradually decreased with declining of the temperature. The soil biomass c increased at the tillering stage when the temperature gradually increased, and rose to the highest value at the anthesis stage, being about 554.9-794.4 mg c kg-1. The application of organic manure resulted in the highest increase in biomass c among the fertilization treatments while that of ammonium sulphate gave the lowest. At the harvest time the soil biomass c decreased to the presowing level. Like the soil biomass c the amount of biomass p was increased by the incorporation of organic manure and was the highest among the treatments, with the values of the check and ammonium sulphate treatments being the lowest. Meanwhile, the changing patterns of the c/p ratio of soil microbial biomass at stages of wheat growth are also described.

关键词： c/p ratio soil microbial biomass c and p winter wheat

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：