Changes of Soil Organic Matter, Soil Microbial Biomass Carbon and Nitrogen Under Conservation Tillage in Heihe River Basin

ZHANG Feng-yun

doi:10.13961/j.cnki.stbctb.2014.01.052

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Changes of Soil Organic Matter, Soil Microbial Biomass Carbon and Nitrogen Under Conservation Tillage in Heihe River Basin

- Changes of Soil Organic Matter, Soil Microbial Biomass Carbon and Nitrogen Under Conservation Tillage in Heihe River Basin
- Bulletin of Soiland Water Conservation Vol. 33, Issue 1, Pages: 93-97(2014)
- 作者机构：
  
  1. 菏泽学院资源与环境系,山东,菏泽,274000
  2. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2014.01.052
  CLC：
- Published：2014
- 稿件说明：
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ZHANG Feng-yun. Changes of Soil Organic Matter, Soil Microbial Biomass Carbon and Nitrogen Under Conservation Tillage in Heihe River Basin[J]. Bulletin of Soiland Water Conservation, 2014, 33(1): 93-97.
DOI：

ZHANG Feng-yun. Changes of Soil Organic Matter, Soil Microbial Biomass Carbon and Nitrogen Under Conservation Tillage in Heihe River Basin[J]. Bulletin of Soiland Water Conservation, 2014, 33(1): 93-97. DOI： 10.13961/j.cnki.stbctb.2014.01.052.

摘要

为了探讨黑河流域保护性耕作对土壤生产力的影响

设计20 cm留茬(NS

)

20 cm留茬压倒(NPS

)

40 cm留茬(NS

)

40 cm留茬压倒(NPS

)和传统耕作(CT)5个处理

研究了黑河流域保护性耕作对农田土壤有机质、土壤微生物量C、土壤微生物量N以及作物产量和水分利用效率的影响。结果表明

保护性耕作农田0-20 cm土层土壤有机质、土壤微生物量C和N的含量均高于传统耕作

且其在剖面中的变化趋势基本一致

即随土层深度增加下降;土壤微生物量N有明显的"表聚现象";相关分析表明土壤有机质和土壤微生物量C之间显著正相关(r=0.85

0.05)

与土壤微生物量N之间无明显的相关关系(r=0.47

p>0.05);保护性耕作提高了春小麦的产量

NPS

和NPS

增产效果最好

较CT分别增产53.08%和46.59%

与CT之间差异达到极显著水平;保护性耕作提高了春小麦的水分利用效率(WUE)

NPS

分别较CT的WUE提高了58.02%

43.40%

47.27%

23.78%。

Abstract

To explore the effects of conservation tillage on soil productivity

a field experiment with the five treatments of no-tillage with 20 cm(NS20) and 40 cm(NS40) standing stubble

no-tillage with 20 cm(NPS20) and 40 cm(NPS40) pressed stubble and conventional tillage

and conventional tillage(CT) were carried out to study the changes of soil organic matter(SOM)

soil microbial biomass carbon(MBC)

soil microbial biomass nitrogen(MBN)

crop yield and water use efficiency(WUE) in the Heihe River Basin. Results showed that SOM

MBC and MBN in 0-20 cm soil layer under conservation tillage

which decreased with increasing soil depth under conservation tillage

were higher than that under CT. MBN significantly accumulated in surface soil under conservation tillage. Correlation analysis showed that MBC was remarkably correlated to SOM(r=0.85 and p<0.05)

while there were no significant correlation between MBN and SOM(r=0.47 and p>0.05). Conservation tillage improved grain yield and WUE compared to CT. NPS20 and NPS40 had the best yield effects

increasing grain yield by 53.08% and 46.59% compared to CT

respectively. WUEs in NPS20

NS40

NPS40 and NS20 were increased by 58.02%

43.40%

47.27% and 23.78%

respectively.

关键词

Keywords

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