KUANG En-jun,HAN Jin-ze,CHI Feng-qin,et al.Effect of Straw Returned to the Different Depths on Soil Microbial Biomass Carbon and Nitrogen[J].HEILONGJIANG AGRICULTURAL SCIENCES,2016,(05):25-29.[doi:10.11942/j.issn1002-2767.2016.05.0025]
秸秆还田深度对土壤微生物碳氮的影响
- Title:
- Effect of Straw Returned to the Different Depths on Soil Microbial Biomass Carbon and Nitrogen
- 文章编号:
- 1002-2767（2016）05-0025-05
- 分类号:
- S154.3
- 文献标志码:
- A
- 摘要:
- 采用网袋的方法明确秸秆还田到不同深度（0、10、20、30、40 cm）后对土壤微生物碳、氮的影响。结果表明：秸秆经过120 d还田腐解，不同深度的微生物量碳、氮均呈现波浪型趋势。表层覆盖的微生物量碳含量最低在76～250 mg?kg-1，10 cm处理各层次最高，在133～422 mg?kg-1，20 cm处理各层次在134～328 mg?kg-1，30 cm处理各层次101～245 mg?kg-1，40 cm处理各层次在71～294 mg?kg-1；各处理微生物量氮含量以表层覆盖和10 cm处理最高，在2～83 mg?kg-1，20 cm处理和30 cm各层次微生物量氮在11～50 mg?kg-1，40 cm处理各层次微生物量氮最低在4～33 mg?kg-1。在秸秆还田到各深度土壤后，比较每一深度秸秆的上层、中层、下层土壤的微生物碳氮含量，均以下层土壤微生物量碳、氮的含量高于中、上层土壤。
- Abstract:
- In order to make sure the effect of straw returned to different soil depths for soil microbial biomass carbon(MBC) and microbial biomass nitrogen(MBN),five soil depths,for surface mulch(the maize straw on the soil surface,0 cm stand for),the treatment of straw returned to soil depath of 10 cm(10 cm stand for),the treatment of straw returned to soil depath of 20 cm(20 cm stand for),the treatment of straw returned to soil depath of 30 cm(30 cm stand for),the treatment of straw returned to soil depath of 40 cm(40 cm stand for).The result showed that after 120 days of maize straw returned to soil,there was a trend of wavy for soil microbial biomass carbon and nitrogen content.The content of MBC surface mulch(0 cm) was lower than others,between 76～250 mg?kg-1,the treatment of 10 cm was highest than others which between 133～422 mg?kg-1,and the treatment of 20,30，40 cm were 134～328 mg?kg-1,101～245 mg?kg-1,71～294 mg?kg-1.The content of MBN in treatment of surface mulch and 10 cm treatment were high than other treatments,which between 2～83 mg?kg-1,and treatment of 20 and 30 cm were in the 11～50 mg?kg-1,40 cm were 4～33 mg?kg-1.Compared with the content of MBC,NBN of upper layer,middle layer and lower layer in each treatment after the straw returned to the different soil depths,value of the lower layer was higher than others.
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备注/Memo
收稿日期：2016-04-05