A incubation experiment with no straw as control was carried out to investigate the effect of straw returning（SF0） and returning with chloroform fumigation（SF1） on paddy soil microorganism activity and its difference. The content of soil dissolved organic carbon（DOC）, mineral nitrogen, microbial biomass carbon（MBC）, microbial biomass nitrogen（MBN） and microorganism quantity were determined after incubation. The results showed as follows: ①Compared with the control, the content of DOC with straw returning（SF0 and SF1） increased significantly and the content of mineral nitrogen decreased significantly.②SF0 and SF1 treatments increased MBC and MBN significantly compared to control and MBN was more sensitive to straw treatments.③Compared with the control, straw returning promoted the proliferation of microorganisms with a significantly increasement in bacteria, fungi and actinomycetes.④The content of DOC and the quantity of bacteria and actinomycetes of SF0 treatment were significantly higher than SF1 treatment. Compared with SF0, straw fumigated pretreatment reduced soil microorganism activity and straw maturity significantly.
PEI Peng-Gang-1, ZHANG Jun-Hua-12, ZHU Lian-Feng-1, YU Sheng-Miao-1, HU Zhi-Hua-1, JIN Qian-Yu-1*
. Effect of Straw Incorporation on Paddy Soil Microorganism Activity under Incubation[J]. China Rice, 2014
, 20(3)
: 6
-10
.
DOI: 10.3969/j.issn.1006-8082.2014.03.002
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