摘要
[目的]探明旱田改水田后黑土酸碱度及土壤微生物的变化。[方法]通过5点采样法取样,利用平板菌落计数法对相关微生物类群数量进行研究。[结果]旱田改为水田后,土壤pH显著上升;细菌和真菌数量明显增多,放线菌数量变化不明显,纤维素分解菌数量逐渐下降,在5~10 cm土层,其数量较旱田显著降低(P<0.05),有机磷细菌和无机磷细菌数量略有增加;在0~5 cm土层水田的B/F比旱田显著降低,但其他土层间B/F差异不大。[结论]短期旱田改水田能初步缓解土壤的酸化问题;旱田改水田后土壤微生物数量发生了变化;水田中各土层间B/F较一致,说明土壤微生物类群结构更为稳定。
[Objective] To explore the changes of microorganisms groups and pH value in black soil after turning dry land into paddy land. [ Method] Five points sampling method was adopted to take samples,and tablet colony counting method was used to study the numbers of soil mi- croorganisms. [ Result ] The results showed that the soil pH value increased significantly after turning dry land into paddy land. The numbers of bacteria and fungi increased significantly, but actinomycetes had no change. Cellulose utilization microorganisms decreased in the depth from 5 to 10 cm significantly（P 〈 O. 05 ）. Organic and inorganic phosphorus bacteria increased slightly. B/F value in paddy field decreased obviously than that in dry land ,especially in the above depth of soil. [ Conclusion] The soil acidification can be remitted in first year after turning dry land into paddy land. The numbers of soil microorganisms change significantly after turning dry land into paddy land. The B/F values among every depth have no difference in paddy field which show that the structure of soil microorganism groups are more stable.
作者
杜春梅
顿圆圆
王妍
韩月新
张海军
董锡文
DU Chun-mei DUN Yuan-yuan WANG Yan DONG Xi-wen et al(College of Life Science,Jiamusi University,Jiamnsi,Heilangjiang 154007 Institute of Applied Microbiology, Jiamnsi University ,Jiamnsi, Heilongjiang 154007)
出处
《安徽农业科学》
CAS
2017年第6期103-105,共3页
Journal of Anhui Agricultural Sciences
基金
佳木斯大学博士启动项目(22Zb201511)
关键词
黑土
旱田
水田
PH
微生物
Black soil
Dry land
Paddy land
pH
Microorganisms
