| 引用本文: | 王 娟,黄成真,冯绍元,等.生物炭对滨海滩涂区土壤理化特性的影响[J].灌溉排水学报,2022,41(10):125-130. |
| WANG Juan,HUANG Chengzhen,FENG Shaoyuan,et al.生物炭对滨海滩涂区土壤理化特性的影响[J].灌溉排水学报,2022,41(10):125-130. |
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| 摘要: |
| 【目的】改善滩涂区土壤理化性质，降低耕层盐分，提高土壤肥力，提高滨海滩涂区盐渍土生产力，实现该区农业可持续发展。【方法】通过盆栽试验，设置普通生物炭（A）和酸改性生物炭（B）及其不同施量（2%、4%、8%）共6个处理，不添加生物炭作为对照（CK），研究了生物炭及其施量对土壤理化特性的影响。【结果】不同施量的生物炭均显著降低了土壤体积质量，增大了土壤孔隙度，有效提高了土壤的持水性能，且施量越高正效应越强，普通生物炭改善效果略优于酸改性生物炭。适量添加生物炭可增强土壤盐分淋洗，提高脱盐率，调节土壤pH值，添加2%酸改性生物炭处理（B2）土壤脱盐率最高，为72.05%，但高施量普通生物炭（A8）不利于土壤脱盐。添加生物炭显著提高了土壤有机质（SOM）和硝态氮量，试验组内以A8、B4处理有机质和硝态氮量较高。【结论】普通生物炭及酸改性生物炭均能有效降低滩涂区土壤含盐量并提高土壤肥力，综合考虑土壤水、盐、肥状况，适量的酸改性生物炭（4%）方案比较适宜研究区盐渍土改良利用。 |
| 关键词: 酸改性生物炭；土壤体积质量；持水特性；脱盐率；土壤养分 |
| DOI：10.13522/j.cnki.ggps.2021563 |
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| Using Biochar Amendment to Improve the Physicochemical Properties of Soil in Coastal Tidal Area |
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WANG Juan, HUANG Chengzhen, FENG Shaoyuan, LIU Chuncheng, LI Hao, HAN Qibiao
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1. Institute of Farmland and Irrigation, Chinese Academy of Agricultural Science/
Key Laboratory of Water Saving Irrigation Project of Ministry of Agriculture, Xinxiang 453002, China;
2. College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China
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| Abstract: |
| 【Objective】Coastal soils are rice in China but most of them are salinized. Improving their quality to facilitate crop growth is essential to safeguard the food security in China. The aim of this paper is to investigate the feasibility of using biochar amendment to improve physical and physicochemical properties of such soils. 【Method】The experiments were conducted using repacked pots; soil in the pots were amended with traditional biochar (A) or acidified biochar (B) applied at mass ratio ranging from 2% to 8%. Traditional remediation without biochar amendment was the control (CK). In each treatment, we measured the change in physical and physicochemical properties of the soils after a period of incubation. 【Result】Biochar amendment significantly reduced soil bulk density, increased soil porosity and the capacity of the soil to hold water, regardless of the biochar types. The improvement increased with biochar application ratio. On average, the traditional biochar was more effective than the acidified biochar. A moderate biochar amendment ratio enhanced salt leaching, improving desalination rate and reducing pH. Amending the soil with the acidified biochar at 2% ratio achieved the highest leaching rate - 72.05%, whereas amending the soil with the traditional biochar at 8% ratio was least effective. We also found that adding biochar significantly increased soil organic matter and nitrate nitrogen, especially the traditional biochar applied at 8% and the acidized biochar applied at 4%. 【Conclusion】Both traditional and acidified biochar can effectively reduce soil salinity and improve soil fertility in the coastal tidal area. Considering improvement in soil water and fertility as well as desalinization, the acidified biochar applied at the ratio of 4% was optimal. |
| Key words: acidified biochar; soil bulk density; soil water holding capacity; desalination; soil nutrient |
