Effects of Straw Returning to Different Soil Depths on Soil Nitrogen and Microbial Biomass Carbon and Nitrogen in Yellow Brown Soil

Zhang Qi; Chen Can; CHEN Xiaomin; Ren Xiaoming; Zhang Zhilong; Liu Wei

doi:10.13961/j.cnki.stbctb.2019.02.009

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Effects of Straw Returning to Different Soil Depths on Soil Nitrogen and Microbial Biomass Carbon and Nitrogen in Yellow Brown Soil

- Effects of Straw Returning to Different Soil Depths on Soil Nitrogen and Microbial Biomass Carbon and Nitrogen in Yellow Brown Soil
- Bulletin of Soiland Water Conservation Vol. 39, Issue 2, Pages: 56-61(2019)
- 作者机构：
  
  1. 南京农业大学资源与环境科学学院,江苏,南京,210095
  2. 南京信息工程大学应用气象学院,江苏,南京,210044
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2019.02.009
  CLC： S157.3
- Published：2019
- 稿件说明：
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Zhang Qi, Chen Can, CHEN Xiaomin, et al. Effects of Straw Returning to Different Soil Depths on Soil Nitrogen and Microbial Biomass Carbon and Nitrogen in Yellow Brown Soil[J]. Bulletin of Soiland Water Conservation, 2019, 39(2): 56-61.
DOI：

Zhang Qi, Chen Can, CHEN Xiaomin, et al. Effects of Straw Returning to Different Soil Depths on Soil Nitrogen and Microbial Biomass Carbon and Nitrogen in Yellow Brown Soil[J]. Bulletin of Soiland Water Conservation, 2019, 39(2): 56-61. DOI： 10.13961/j.cnki.stbctb.2019.02.009.

摘要

[目的

]

研究不同深度秸秆还田对土壤氮素和微生物生物量碳、氮含量变化的影响，为提高还田秸秆利用效率提供科学依据。[方法

]

采用田间小区试验的方法，共设5个不同处理：对照CK（不添加秸秆），T

（表面覆盖），T

（10 cm还田），T

（20 cm还田），T

（30 cm还田）处理。[结果

]

①与对照相比，秸秆还田处理中土壤有机质、全氮和硝态氮含量分别增加了3.98%~29.36%，2.72%~45.52%，10.48%~56.64%，铵态氮降低了7.75%~39.20%；②秸秆还田处理对土壤微生物生物量有显著影响，与对照相比，秸秆还田处理中土壤微生物生物量碳和氮分别增加了5.01%~35.78%和9.69%~52.56%；③运用主成分分析方法评估了秸秆还田各处理土壤质量状况，综合得分次序为：CK

，在10和20 cm深度秸秆还田对土壤氮素水平和微生物生物量碳和氮含量的提高具有较好的作用，且以10 cm秸秆还田处理效果最为明显。[结论

]

秸秆还田可以提高土壤氮素水平和微生物生物量碳和氮含量，改良土壤性状，在秸秆还田深度为10和20 cm效果较好，尤其10 cm秸秆还田对土壤中氮素和微生物生物量碳氮的影响最为显著。

Abstract

[Objective] This paper studied the effects of straw returning on soil nitrogen and microbial biomass carbon and nitrogen contents in different soil depths to provide scientific basis for improving the efficiency of returning straw.[Methods] Five different treatments were labeled as control CK(no straw)

T0(surface coverage)

T10(10 cm returning field)

T20(20 cm returning field)

T30(30 cm returning to the field).[Results] ① Compared with the control

the contents of soil organic matter

total nitrogen and nitrate nitrogen in straw returning treatments increased 3.98%~29.36%

2.72%~45.52%

10.48%~56.64%

respectively. The contents of ammonium nitrogen decreased about 7.75%~39.20%. ② The straw returning treatment had a significant effect on soil microbial biomass. Compared with the control

the soil microbial biomass carbon and nitrogen increased 5.01%~35.78%

9.69%~52.56%

respectively. ③ Principal component analysis method was used to evaluate the soil quality with different straw returning treatments. The comprehensive score order was CK < T30 < T0 < T20 < T10. When the straw returned to the field at 10 cm and 20 cm depth

labeled T10 and T20 treatments

had more significant effects on soil nitrogen levels and microbial biomass carbon and nitrogen contents than other treatments had

and the treatment effect of 10 cm straw returning was most obvious.[Conclusion] Straw returning could increase soil nitrogen and microbial biomass carbon and nitrogen content

improve soil traits. Better effects for 10 cm and 20 cm depths of straw returning were found

especially for 10 cm depth straw returning

and its effect were the most significant in soil nitrogen and microbial biomass carbon and nitrogen.

关键词

Keywords

references

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