中国生态农业学报2011，Vol.19Issue(2)：240-245,6.DOI:10.3724/SP.J.1011.2011.00240
耕作方式对长期免耕农田土壤微生物生物量碳的影响
Effect of tillage practices on soil microbial biomass carbon in the field with long-term non-tillage
摘要
Abstract
In order to provide a reasonable basis for the rotational tillage system, the effects of different tillage practices on soil microbial biomass carbon (SMBC) were determined in double maturation of wheat-com cropping fields with long-term non-tillage in North China Plain. The results showed that tillage managements significantly influenced spatio-temporal variations and stability of SMBC in long-term non-tillage soil. SMBC in the 0～5 cm and 5～10 cm soil layers exhibited obvious seasonal variations in different treatments. While the lowest value was at double ridge stage, the maximum was at harvest stage of wheat. In deep soil layers, there were insignificant seasonal variations in SMBC. SMBC significantly decreased (P＜0.05) with soil depth under non-tillage and straw mulch (NT) treatment. In the 0～5 cm and 5～10 cm soil layers, SMBC was insignificantly different under conventional tillage (CT)and rotary tillage (RT). Among all other soil layers, however, SMBC was significantly different (P＜0.05). Compared with NT treatment, CT and RT dropped average SMBC by 6.7％ and 6.1％ in the 0～5 em layer. However, CT and RT significantly increased SMBC by 30.2％ and 20.7％ (P＜0.01) in the 5～10 cm layer. Also average SMBC under RT and CT increased significantly by 10.5％(P＜0.05) and 48.1％ (P＜0.01) in the 10～20 cm layer. The trend of the effects of different treatments on SMBC stability in the 0～20cm soil layer was as follows: CT ＞ RT ＞ NT. That in the 20～30 cm soil layer was NT ＞ CT ＞ RT.关键词
轮耕制度/免耕土壤/免耕/翻耕/旋耕/土壤微生物生物量碳(SMBC)Key words
Rotational tillage system/ Long-term non-tillage soil/ Non-tillage (NT)/ Conventional tillage (CT)/ Rotary tillage (RT)/ Soil microbial biomass carbon (SMBC)(Received June 29, 2010/ accepted Nov. 11, 2010)分类
农业科技引用本文复制引用
孔凡磊,张明园,范士超,张海林,陈阜..耕作方式对长期免耕农田土壤微生物生物量碳的影响[J].中国生态农业学报,2011,19(2):240-245,6.基金项目
国家科技支撑计划项目(2006BAD15B01,2007BAD89B08)和农业部公益性行业(农业)科研专项(200803028)资助 （2006BAD15B01,2007BAD89B08）
