研究报告
陈晓旋,黄晓婷,陈优阳,安婉丽,王维奇.炉渣与生物炭配施对福州平原稻田土壤团聚体及碳、氮分布的影响[J].环境科学学报,2018,38(5):1989-1998
炉渣与生物炭配施对福州平原稻田土壤团聚体及碳、氮分布的影响
- Effects of slag and biochar mixed amendment on soil aggregates and carbon, nitrogen distribution in paddy field of Fuzhou plain
- 基金项目：国家自然科学基金项目（No.41571287，31000209）；福建省科技厅重点项目（No.2018R1034-1）；福建省高校杰出青年科研人才培育计划（2017）
- 作者
- 单位
- 陈晓旋
- 福建师范大学地理研究所, 福州 350007
- 黄晓婷
- 福建师范大学地理研究所, 福州 350007
- 陈优阳
- 福建师范大学地理研究所, 福州 350007
- 安婉丽
- 福建师范大学地理研究所, 福州 350007
- 王维奇
- 1. 福建师范大学地理研究所, 福州 350007;2. 福建师范大学湿润亚热带生态地理过程教育部重点实验室, 福州 350007
- 摘要：土壤水稳性团聚体及土壤碳、氮含量是影响土壤肥力的关键因素.以福州平原稻田为研究区，在早稻和晚稻生长季，对对照、炉渣、生物炭和炉渣与生物炭配施处理下耕层和犁底层土壤团聚体分布及其稳定性，包括>0.25 mm团聚体含量（DR0.25）、平均质量直径（MWD）、几何平均直径（GMD）、分形维数（D）及土壤碳、氮含量进行了测定和分析.研究结果表明：早稻和晚稻不同土层，对照、炉渣、生物炭和配施4种处理团聚体均以<0.25 mm粒级为主；>0.25 mm水稳定性大团聚体数量随深度增加而增加，土壤团聚体的稳定性随土层加深而增强；早稻组中，生物炭施加后MWD、GMD和DR0.25较对照组分别减少了20.08%、15.12%和21.87%，D值增加了3.67%，炉渣和配施后差异不显著（p>0.05）；晚稻组中，生物炭施加后MWD、GMD和DR0.25较对照组分别增加了23.00%、13.82%和16.75%，配施后MWD、GMD和DR0.25较对照组分别增加了16.77%、9.80%和15.37%，D值分别减少了3.75%和2.59%，炉渣施加后差异不显著（p>0.05）；炉渣、生物炭和配施3种处理都显著增加了早稻耕层和晚稻耕层土壤的碳含量，生物炭和配施处理都显著增加了早稻耕层和晚稻耕层土壤的氮含量（p<0.05），3种处理都显著增大了早稻耕层土壤C/N比（p<0.05），同时，土壤不同粒级团聚体碳、氮含量百分比主要集中在>0.25 mm粒级大团聚体.
- Abstract：Soil water stable aggregates, soil carbon and nitrogen content were the key factors controlling soil fertility. Taken the Fuzhou plain as the study area, the effect of slag and biochar mixed amendment on the distribution, stability of soil water stable aggregates, soil carbon and nitrogen content in early and late paddy field in Fuzhou plain, including >0.25 mm soil aggregates (DR0.25), mean weight diameter (MWD), geometric mean diameter(GMD), fractal dimension (D), soil carbon and nitrogen of plow layer and plow bottom layer were determined in the control, slag, biochar and mixed amendment plots. The results showed that the aggregates were mainly <0.25 mm for the control, slag, biochar and mixed four kinds treatments. The amount of >0.25 mm water stability large aggregates were increased with soil depth, and the soil aggregates stability was enhanced with the increment of soil layer. In the early paddy field group, the MWD, GMD and DR0.25 were reduced by 20.08%, 15.12% and 21.87%, respectively, and the D value was increased by 3.67%, and the difference between the slag and the mixed amendment was not significantly different (p>0.05). In the late paddy field group, the MWD, GMD and DR0.25 were increased by 23.00%, 13.82% and 16.75%, respectively, compared with the control group, the values of MWD, GMD and DR0.25 were increased by 16.77%, 9.80% and 15.37%, respectively. The D values were decreased by 3.75% and 2.59%, respectively, and the difference was not significantly different (p>0.05). Slag, biochar and mixed three kinds of treatments were all significantly increased the carbon content of early and late paddy field soil, and the nitrogen contents were significantly increased by biochar and mixed in early and late paddy field (p<0.05), moreover, the C/N ratio was significantly increased for three treatments in plow layer soil of the early paddy field (p<0.05).
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