Soil Microbial Biomass and Soil Light Fraction C and N Among Alfalfa Grassland, Alfalfa-Crop Rotation System

WANG Xiao-ling; LI Feng-min

您当前的位置：

首页 >

文章列表页 >

Soil Microbial Biomass and Soil Light Fraction C and N Among Alfalfa Grassland, Alfalfa-Crop Rotation System

更新时间：2024-11-07

- Soil Microbial Biomass and Soil Light Fraction C and N Among Alfalfa Grassland, Alfalfa-Crop Rotation System
- Vol. 20, Issue 4, Pages: 132-135(2006)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：
  CLC： S551.7S154.3
- Published：2006
- 稿件说明：
移动端阅览
WANG Xiao-ling, LI Feng-min. Soil Microbial Biomass and Soil Light Fraction C and N Among Alfalfa Grassland, Alfalfa-Crop Rotation System[J]. 2006, 20(4): 132-135.
DOI：

WANG Xiao-ling, LI Feng-min. Soil Microbial Biomass and Soil Light Fraction C and N Among Alfalfa Grassland, Alfalfa-Crop Rotation System[J]. 2006, 20(4): 132-135. DOI：

摘要

从2000年10月到2004年4月，通过大田试验研究了半干旱黄土高原地区，苜蓿草地、苜蓿-作物轮作农田以及常规耕作农田中土壤有机碳、土壤全氮、土壤微生物生物量与土壤轻组物质的变化规律。结果表明，土壤轻组有机碳和氮含量苜蓿-作物轮作系统高于苜蓿草地。土壤微生物量碳和氮，以及它们占土壤有机碳和土壤全氮的比苜蓿-作物轮作系统高于常规耕作农田。土壤呼吸商苜蓿-作物轮作系统低于苜蓿草地和常规耕作农田。14年生苜蓿草地土壤微生物含量高，分解腐化植物碎片的能力高，但土壤有机物质利用不经济，3年中土壤全氮含量并无显著增加，这说明该系统较高的物质循环能力仅维持高的土壤肥力，而不能继续提高土壤肥力。苜蓿-作物用地系统不但能克服长时间种植苜蓿造成的物质循环的浪费，而且维持了良好的土壤肥力，促进了土壤氮素的有效利用。

Abstract

A field experiment was conducted from October 2000 to Spring 2004 to examine soil microbial biomass C and N

soil light fraction C and N among the soils of alfalfa grassland

alfalfa-crop system

and conventional field systems(CS) in the semiarid loess plateau region of northwest China.The results showed that light fraction C and N pools of the alfalfa-crop rotation systems were higher than in alfalfa grassland.Microbial biomass C and N

as well as their ratios to the total in soils of the alfalfa-crop systems were higher than in conventional systems.Metabolic quotient was lower in the alfalfa-crop rotation systems than in 14-year-alfalfa grassland(AS14) and CS.The high soil microbial biomass

high decomposition ability for recently added plant material

but not utilizing the available resources more economically

indicated that high organic matter circulation in AS14 just kept soil fertility and didn't increase soil fertilizer.The alfalfa-crop rotation systems not only improved circulation of organic matter in 14-year-alfalfa grassland

but also maintained soil fertilizer over conventional farming system

and increased soil N utilization.

关键词

Keywords

references

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Soil Microbial Carbon Use Efficiency in Pinus armandii Forests in Central Yunnan Responds to Nitrogen Deposition in Different Seasons

Soil Aggregates and Organic Carbon Distribution Characteristics Based on Long-Term Organic Substitution

Soil Microbial Biomass Carbon， Nitrogen， and Phosphorus and Stoichiometric Characteristics in Natural Secondary Forests of Cold-Temperate Zone

Soil-microbe-exoenzyme C∶N∶P Stoichiometric Characteristics in Artificial Pure Forests of Four Tree Species in the Hilly Region of Central Hunan

Effect of Water and Fertilizer upon Artificial Timbered Soilwith Almond-Apricot Plants of Different Age

Related Author

LIANG Xiaoling

ZHANG Long

WANG Keqin

SONG Yali

SHU Haiyuan

ZHOU Yuxi

ZHANG Xi

SUN Wanchun

Related Institution

College of Ecology and Environment， Southwest Forestry University

College of Soil and Water Conservation， Southwest Forestry University

Zhejiang Key Laboratory of Soil Remediation and Quality Improvement

Institute of Environment Resource and Soil Fertilizer， Zhejiang Academy of Agricultural Sciences

College of Forestry， Northeast Forestry University

⁰