| 胡燕梅,陈正发,颜科宇,王道祥,段青松,张川.生物炭对红壤坡耕地土壤持水及入渗特性的影响[J].干旱地区农业研究,2025,(2):192~203 |
| 生物炭对红壤坡耕地土壤持水及入渗特性的影响 |
| Effects of biochar on soil water holding and infiltration characteristics of red soil slope cropland |
| |
| DOI：10.7606/j.issn.1000-7601.2025.02.19 |
| 中文关键词: 红壤 坡耕地 土壤持水能力 土壤入渗特性 生物炭 |
| 英文关键词:red soil sloping cropland soil water holding capacity soil infiltration characteristics biochar |
| 基金项目:云南省基础研究计划面上项目（202201AT070272）；云南省农业基础研究联合专项面上项目（202301BD070001-033，202301BD070001-180）；云南省水利科技项目（2023BG204001）；云南省作物生产与智慧农业重点实验室开放基金课题（2022） |
|
| 摘要点击次数: 83 |
| 全文下载次数: 39 |
| 中文摘要: |
| 为探究添加生物炭对红壤坡耕地土壤持水及入渗特性的影响，按土壤质量的0%（S0）、1%（S1）、3%（S2）、5%（S3）设置4种秸秆生物炭添加量，通过定位测定不同生物炭添加条件下土壤理化性质及电镜扫描微观结构变化，分析其持水性能特征；同时采用室内双环法测定土壤入渗特征参数，并优选出适宜的土壤入渗模型。结果表明：（1）随着生物炭添加量增加，土壤微团聚体（＜0.25 mm）含量显著减少，在全生育期S1、S2、S3处理分别较S0处理的微团聚体平均值减少4.44%、5.89%、15.82%，而以0.25～0.5 mm、0.5～1.0 mm粒径为代表的大团聚体含量显著增加，在全生育期内S1、S2、S3处理与S0处理相比土壤大团聚体含量平均值分别增加了4.21%、5.58%、14.99%，在全生育期S1、S2、S3处理土壤容重平均值分别较S0处理减少2.30%、4.25%、6.48%（P＜0.05），土壤总孔隙度、含水率及有机碳含量显著增加，在全生育期S1、S2、S3处理均值较S0处理的土壤总孔隙度分别增加1.37%、2.21%、3.96%，含水率分别增加10.04%、16.62%、19.30%，有机碳含量分别增加14.01%、38.26%、46.23%（P＜0.05）。（2）电镜扫描结果显示，红壤微观颗粒呈片状结构，随着生物炭添加量增加，土壤颗粒比表面积显著增大，从而有利于土壤颗粒间的孔隙通道形成。（3）添加生物炭有利于提高土壤持水性能，但对土壤入渗过程表现出明显的阻滞效应，且随着生物炭添加量的增加，阻滞效应越明显。（4）Philip、Horton、Kostiakov、Green-Ampt和NRCS模型均可较好地描述生物炭添加条件下红壤坡耕地土壤入渗过程，其中Kostiakov模型拟合效果最优。 |
| 英文摘要: |
| To examine the impact of biochar addition on water retention and infiltration characteristics in red soil slope cropland, four biochar application levels were established based on soil quality: 0% (S0), 1% (S1), 3% (S2), and 5% (S3).The physicochemical properties of the soil and the microstructural changes observed through electron microscopy under different biochar addition conditions were analyzed to assess the water retention characteristics. Simultaneously, the indoor double\|ring method was used to determine the infiltration characteristics of the soil, and a suitable soil infiltration model was selected. The results showed that: (1) With the increase of biochar addition, the content of soil micro\|aggregates (<0.25 mm) significantly decreased. During the entire growth period, the average micro\|aggregate content in the S1, S2, and S3 treatments decreased by 4.44%, 5.89%, and 15.82%, respectively, compared to the S0 treatment. In contrast, the content of macro\|aggregates represented by particle sizes of 0.25~0.5 mm and 0.5~1.0 mm significantly increased. During the entire growth period, the average content of macro\|aggregates in the S1, S2, and S3 treatments increased by 4.21%, 5.58%, and 14.99%, respectively, compared to S0. The average bulk density of the soil in the S1, S2, and S3 treatments decreased by 2.30%, 4.25%, and 6.48% compared to S0 (P<0.05). The total pore volume, water content, and organic carbon content of the soil significantly increased. During the entire growth period, the total pore volume for S1, S2, and S3 treatments increased by 1.37%, 2.21%, and 3.96%, respectively, while the water content increased by 10.04%, 16.62%, and 19.30%, and the organic carbon content increased by 14.01%, 38.26%, and 46.23% (P<0.05). (2) Electron microscopy showed that the microscopic particles of red soil exhibited a flaky structure, and with the increase of biochar addition, the specific surface area of soil particles significantly increased, facilitating the formation of pore channels between soil particles. (3) Adding biochar was beneficial for enhancing soil water retention, but it exhibited a notable hindrance effect on the soil infiltration process, which became more pronounced increasing biochar addition. (4) The Philip, Horton, Kostiakov, Green-Ampt, and NRCS models all described the soil infiltration process under biochar addition conditions well, with the Kostiakov model showing the best fitting results. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| | |