| 毕冬梅,张仁陟,汪娟,王新建,蔡立群.不同耕作措施对麦—豆轮作条件下土壤有机碳库与微生物商的影响[J].干旱地区农业研究,2009,27(6):11~16 |
| 不同耕作措施对麦—豆轮作条件下土壤有机碳库与微生物商的影响 |
| Effect of different tillage patterns on organic carbon pool and microbial quotient in t wo sequence rotation syste m with spring wheat and field pea |
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| DOI：10.7606/j.issn.1000-7601.2009.06.03 |
| 中文关键词: 耕作措施 轮作 土壤有机碳 易氧化碳 微生物生物量碳 |
| 英文关键词:tillage pattern sequence rotation system soil organic carbon readily oxidizable carbon microbial biomass carbon |
| 基金项目:国家科技支撑计划项目(2006BAD15B06)； 国家自然基金项目(40771132) |
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| 中文摘要: |
| 以长期定位试验为基础,对麦—豆轮作次序下不同耕作措施间的土壤有机碳、易氧化碳以及微生物生物量碳进行了测定,计算了土壤微生物商在各个序列中变化并对土壤各级有机碳库进行了相关分析。结果表明:两种轮作次序下传统耕作结合秸秆还田、免耕不覆盖、免耕秸秆覆盖与传统耕作不覆盖相比更有利于土壤有机碳库含量的提高,同时各处理表层有机碳含量明显高于其它层次并且随着土层的增加而递减。相关分析结果显示,土壤活性有机碳较大程度上依赖土壤有机碳的含量,同时也说明易氧化碳与微生物都在一定程度上表征了土壤中活性较高部分的有机碳含量。不同耕作处理的土壤微生物商均表现为NTS、NT、TS处理大于T处理,和不同耕作处理下土壤总有机碳含量的变化趋势一致。相较于其它处理免耕秸秆覆盖的土壤微生物商在各个序列中变化最明显,说明免耕秸秆覆盖对土壤有机碳含量的增加和土壤有机质的累积的贡献最大。 |
| 英文摘要: |
| Based on a long-term experiment,the soil organic carbon(SOC),readily oxidizable carbon(ROC) and microbial biomass carbon(MBC) of two sequence rotation systems with spring wheat and field pea in soil layer under different tillage patterns were studied.The results showed that the content of soil organic carbon(SOC) pool in conventional tillage with straw incorporated(TS),no-till without straw cover(NT),no-till with straw cover(NTS) were more than conventional tillage with no straw(T),and the content of SOC in 0～5 cm soil layer was higher than other layers,and decreased with the soil depth,especially in NTS.Correlation analysis showed that the indicator of ROC and MBC had the same response to the long-term tillage methods with SOC.They were significantly correlated to SOC.The accumulation of microbial quotient with NTS was more than other tillage patterns.The results demonstrated that the activity of the carbon in soil of NTS was higher and could convert easily. |
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