Zhou Wei-jun, Zeng Xi-bai, Zhnag Yang-zhu, Zhou Qing, Guo Hai-yan, Yan Xiong, Chen Jian-guo
College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
Ying Yong Sheng Tai Xue Bao. 2007 May;18(5):1043-8.
Based on the monitoring of soil fertility, this paper studied the characteristics of microbial biomass C (MBC) and N (MBN) in paddy soils derived from different parent materials in Hunan Province. The results showed different fertilization systems had different effects on soil MBC and MBN. After 18 years fertilization, the MBC and MBN in different paddy soils had similar variation trend, with the sequence of paddy soil derived from lake sediment > from river alluvium and quaternary red earth > from limestone > from shale. Soil MBC content ranged from 259.5 to 864.4 mg x kg(-1), while MBN ranged from 8.7 to 70.7 mg x kg(-1). Fertilization could increase soil MBC and MBN markedly. Organic fertilizer was the main element for the promotion of soil MBC and MBN, and combined application of organic and inorganic fertilizers could obtain the greatest effect. The increment of soil MBC and MBN after applying inorganic fertilizer and its combination with organic fertilizer was 407.6 and 59.2 mg x kg(-1), in maximum, and the maximum increasing rate was 102.8% and 514.8%, respectively, compared with no fertilization.
基于土壤肥力监测，研究了湖南省不同母质发育的水稻土中微生物量碳（MBC）和氮（MBN）特征。结果表明，不同施肥制度对土壤MBC和MBN影响各异。施肥18年后，不同水稻土中MBC和MBN变化趋势相似，表现为湖积物发育水稻土＞河流冲积物和第四纪红土发育水稻土＞石灰岩发育水稻土＞页岩发育水稻土。土壤MBC含量为259.5～864.4mg·kg-1，MBN含量为8.7～70.7mg·kg-1。施肥能显著提高土壤MBC和MBN含量。有机肥是促进土壤MBC和MBN的主要因素，有机无机肥配施效果最佳。与不施肥相比，单施无机肥及其与有机肥配施后土壤MBC和MBN增量最大分别为407.6mg·kg-1和59.2mg·kg-1，最大增幅分别为102.8%和514.8%。
