| 刘璇,庞茹月,赵健,司彤,王月福,邹晓霞,矫岩林.不同轮作模式对土壤活性碳组分及矿化的影响[J].农业环境科学学报,2023,42(8):1768-1777. |
| 不同轮作模式对土壤活性碳组分及矿化的影响 |
| Effects of different rotation modes on the concentrations of soil activate carbon fractions and characteristics of carbon mineralization |
| 投稿时间：2022-11-14 修订日期：2023-03-03 |
| DOI：10.11654/jaes.2022-1165 |
| 中文关键词: 花生 轮作模式 可溶性碳 微生物生物量碳 碳矿化 |
| 英文关键词: peanut rotation modes dissolved organic carbon microbial biomass carbon carbon mineralization |
| 基金项目:国家花生产业技术体系项目（CARS-13） |
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| 摘要点击次数: 1889 |
| 全文下载次数: 1892 |
| 中文摘要: |
| 为研究不同花生轮作模式下土壤活性碳库变化，在大田条件下进行定位试验。试验以春花生一年一作（CP）为对照，设置4种轮作种植模式：春花生→冬小麦-夏玉米两年三作（P→W-M）、冬小麦-夏玉米一年两作（W-M）、冬小麦-夏花生一年两作（WP）、冬小麦-夏花生→冬小麦-夏玉米两年四作（W-P→W-M），共计5个处理，研究不同种植模式下土壤有机碳及土壤可溶性有机碳、微生物生物量碳等活性碳组分含量变化和碳矿化特征。结果发现：相较于CP模式，P→W-M模式显著提高了0~40 cm土层有机碳（52.7%~53.3%）、可溶性有机碳（13.3%~344.8%）及微生物生物量碳含量（25.3%~101.4%），W-P模式显著提高了0~40 cm土层有机碳（39.3%~46.8%）及0~20 cm土层可溶性有机碳（271.4%）、微生物生物量碳含量（44.3%），W-P→W-M模式则显著降低了20~40 cm土层各碳组分含量。各种植模式土壤有机碳矿化速率均符合一级动力学模型。CP和W-P模式具有较低的潜在矿化有机碳库，W-M和W-P→W-M模式显著提高了潜在矿化有机碳库与土壤有机碳的比值。研究表明，P→W-M和W-P模式可提升土壤有机碳和活性碳组分含量，有效降低土壤潜在矿化有机碳量，提高土壤有机碳的固持。 |
| 英文摘要: |
| To assess the effects of various planting modes on soil active carbon pools in field experiments, four rotation modes were applied with continuous cultivation of peanut(Arachis hypogaea Linn.)(CP)as a control. The four rotation modes were as follows:spring peanut → winter wheat(Triticum aestivum L.)- summer maize(Zea mays L.)rotation(P→W-M), winter wheat-summer maize rotation(W-M), winter wheat-summer peanut rotation(W-P), winter wheat-summer peanut → winter wheat-summer maize rotation(W-P→W-M). The concentration of soil organic carbon(SOC) and active carbon fractions such as dissolved organic carbon(DOC) and microbial biomass carbon(MBC), and carbon mineralization characteristics were assessed. The results showed that compared with CP, P→W-M significantly increased the content of SOC(52.7%~53.3%), DOC(13.3%~344.8%), and MBC(25.3%~101.4%). W-P significantly increased the content of SOC in the 0~40 cm soil layers(39.3%~46.8%) and that of DOC(271.4%) and MBC(44.3%)in the 0~20 cm layer. The concentrations of all carbon fractions in the W-P→W-M treatment were significantly decreased. Carbon mineralization in all planting modes was consistent with the first-order dynamic model. Lower potentially mineralized carbon (C0) was found in CP and W-P, while W-M and W-P→W-M significantly increased the value of C0/SOC. In conclusion, P→W-M and W-P can increase the concentration of SOC and active carbon fractions, reduce the potentially mineralized carbon, and improve soil organic carbon sequestration. |
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