| 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,(10):-. |
| 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,(10):-. |
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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）和硝态氮含量，试验组内以A8和B4处理有机质和硝态氮量最高。【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： |
| 分类号:S156.4 |
| 基金项目:农业部节水灌溉工程重点实验室开放课题（FIRI202002-0301），国家自然科学基金项目（51609209），江苏省自然科学基金项目(BK20160471) |
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| The effects of biochar on soil properties in coastal tidal area |
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WANG Juan1, HUANG Chengzhen2, FENG Shaoyuan2, LIU Chuncheng2, LI Hao3, HAN Qibiao3
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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/College of Hydraulic Science and Engineering, Yangzhou University;2.College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou,Jiangsu;3.Institute of Farmland and Irrigation,Chinese Academy of Agricultural Science/Key Laboratory of Water Saving Irrigation Project of Ministry of Agriculture,Xinxiang,Henan
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| Abstract: |
| 【Objective】In order to improve soil physicochemical properties, reduce surface soil salinity and improve soil fertility, thereby improving productivity of coastal tidal soil and realizing the sustainable agricultural development in regional area, 【Method】a pot experiment with six treatments was carried out by applying normal biochar (A) and acidified biochar (B) with different application rate (2%, 4%, and 8%); in addition, the traditional cultivation without biochar application as the control (CK), to study the impact of biochar on soil physicochemical properties. 【Result】The results indicate that all of the biochar treatments significantly reduced soil bulk density, increased soil porosity and effectively enhanced soil water holding capacity. Furthermore, the higher the application rate was, the stronger the positive effect was, and the improvement effect of normal biochar is slightly better than that of the acidified biochar. The moderate biochar application rate can enhance soil salt leaching, improve the desalination rate and adjust soil pH value. Soil desalination rate under B2 treatment (acidified biochar at 2%) is the highest (72.05%), whereas high application rate of normal general biochar (A8) is not conducive to soil desalination. The addition of biochar can significantly increase the contents of soil organic matter (SOM) and nitrate nitrogen, all of the nutrient was highest under A8 and B4 treatments. 【Conclusion】
Generally, both normal biochar and acidified biochar can effectively reduce soil salinity and improve soil fertility in coastal tidal area. Comprehensive considering soil water, salt and fertilizer variation, the acidified biochar at the application rate of 4% is recommended in the study area. |
| Key words: Acidified Biochar, Soil bulk density, Soil water holding capacity, Desalination, Soil nutrients |
