王春,张通港,罗敏,闫思慧,程煜,张体彬,冯浩.不同盐渍化土壤N2O排放对生物炭添加和土壤水分的响应[J].干旱地区农业研究,2023,(3):142~149
不同盐渍化土壤N2O排放对生物炭添加和土壤水分的响应
Response of soil N2O emission to biochar addition and water content under different salinization conditions
  
DOI：10.7606/j.issn.1000-7601.2023.03.19
中文关键词:  盐渍化土壤  水分含量  生物炭  N2O排放
英文关键词:salinized soil  water content  biochar  N2O emission
基金项目:国家重点研发计划项目（2021YFD1900700）；陕西省创新能力支撑计划项目（2022PT-23）
作者单位
王春 西北农林科技大学旱区农业水土工程教育部重点实验室，陕西 杨凌 712100；西北农林科技大学水利与建筑工程学院，陕西 杨凌 712100 
张通港 西北农林科技大学旱区农业水土工程教育部重点实验室，陕西 杨凌 712100；西北农林科技大学水利与建筑工程学院，陕西 杨凌 712100 
罗敏 西北农林科技大学旱区农业水土工程教育部重点实验室，陕西 杨凌 712100；西北农林科技大学水利与建筑工程学院，陕西 杨凌 712100 
闫思慧 西北农林科技大学旱区农业水土工程教育部重点实验室，陕西 杨凌 712100；西北农林科技大学水利与建筑工程学院，陕西 杨凌 712100 
程煜 西北农林科技大学旱区农业水土工程教育部重点实验室，陕西 杨凌 712100；西北农林科技大学水利与建筑工程学院，陕西 杨凌 712100 
张体彬 西北农林科技大学旱区农业水土工程教育部重点实验室，陕西 杨凌 712100；西北农林科技大学水土保持研究所，陕西 杨凌 712100；中国科学院水利部水土保持研究所，陕西 杨凌 712100 
冯浩 西北农林科技大学旱区农业水土工程教育部重点实验室，陕西 杨凌 712100；西北农林科技大学水土保持研究所，陕西 杨凌 712100；中国科学院水利部水土保持研究所，陕西 杨凌 712100 
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中文摘要:
      为探讨不同盐渍化程度土壤N2O排放对生物炭添加和土壤水分的响应，开展为期30 d的室内培养试验，设置5个土壤盐渍化水平（S0、S1、S2、S3、S4：盐分添加量分别为土壤质量的0%、0.25%、0.5%、0.75%、1%）、2个生物炭添加方式（B0：不添加；B1：添加量为土壤质量的5%）和2个水分条件（W0：60%田间持水量；W1：100%田间持水量）。结果表明：土壤盐分对N2O累积排放量具有显著影响，盐分含量越高则降幅越大，与S0处理相比，S1、S2、S3、S4处理N2O累积排放量分别降低43.9%、66.5%、91.9%、93.2%。土壤水分对N2O累积排放量具有极显著影响，水分含量越高则累积排放量越大，与W0处理相比，W1条件下各盐分处理N2O累积排放量分别增加3.0%、84.8%、187.4%、729.4%、306.7%。生物炭添加对N2O累积排放量存在一定影响，与B0处理相比，低水含量下，B1处理累积排放量增幅为3.4%~20.6%，高水含量增幅为46.5%~535.6%。结果显示，土壤盐渍化程度越高则N2O累积排放量越低，土壤水分在N2O排放中占据主导作用，土壤含水量越高则N2O累积排放量增幅越大，生物炭单一因素对N2O排放无显著影响，但其与盐分的交互作用对N2O排放有显著影响，生物炭的添加在一定程度上会抑制N2O排放。
英文摘要:
      To investigate the response of soil N2O emission to biochar addition and soil water with different salinization levels, an indoor culture experiment was conducted for 30 days and five soil salinization levels (S0, S1, S2, S3 and S4) were set up. The salt content was 0%, 0.25%, 0.5%, 0.75% and 1% of soil mass, respectively. Two biochar addition modes of B0: no addition and B1: 5% of soil mass and 2 moisture conditions of W0: 60% field capacity and W1:100% field capacity were used. The results showed that soil salt had a significant effect on the cumulative emission of N2O, and the higher the salt content was, the greater the decrease was. Compared with S0 treatment, the cumulative emission of N2O in S1, S2, S3 and S4 treatments decreased by 43.9%, 66.5%, 91.9% and 93.2%, respectively. Soil moisture had a significant impact on the cumulative emission of N2O. The higher the moisture content was, the greater the cumulative emission was. Compared with W0 treatment, the cumulative emission of N2O in each salt treatment under W1 condition increased by 3.0%, 84.8%, 187.4%, 729.4% and 306.7%, respectively. The addition of biochar had an impact on the cumulative emission of N2O. Compared with B0 treatment, the increase of B1 in low water content was 3.4% to 20.6%, and that in high water content was 46.5% to 535.6%. The results showed that the higher the degree of salinization was, the lower the cumulative emissions of soil N2O became. Water had the dominant role in the emission of N2O as water had a very significant impact on the cumulative emissions of N2O. The higher the water content was, the higher the increase of cumulative emissions of N2O became. Biochar alone had no significant impact on the cumulative emissions of N2O. However, the interaction with salt had a significant effect on the cumulative emission of N2O, reducing the emission to a certain extent.
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