文章摘要
张海晶, 王少杰, 田春杰, 罗莎莎.玉米秸秆及其生物炭对东北黑土溶解有机质特性的影响[J].水土保持学报,2021,35(2):243~250
玉米秸秆及其生物炭对东北黑土溶解有机质特性的影响
Effects of Maize Straw and Its Biochar on the Dissolved Organic Matter Characteristics of Black Soil in Northeastern China
投稿时间:2020-08-24  
DOI:10.13870/j.cnki.stbcxb.2021.02.032
中文关键词: 生物炭  秸秆还田  黑土  土壤理化性质  溶解有机质
英文关键词: biochar  straw return  mollisol  soil physicochemical properties  dissolved organic matter
基金项目:国家重点研发计划项目(2017YFD0200100);吉林省自然科学基金项目(20200201017JC,20200201209JC);国家自然科学基金项目(41907081,41701332)
作者单位E-mail
张海晶1, 王少杰1, 田春杰1,2, 罗莎莎2 1. 吉林农业大学资源与环境学院, 吉林省商品粮基地土壤资源可持续利用重点实验室, 长春 130118

2. 中国科学院东北地理与农业生态研究所
, 黑土区农业生态重点实验室, 长春 130102 
wsj_jlau@163.com;luoshasha@iga.ac.cn 
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中文摘要:
      以典型东北黑土为研究对象,连续3年(2016—2018年)在吉林省长春市中国科学院东北地理与农业生态研究所长春综合农业实验站开展田间定位试验,研究生物炭(BR)、秸秆(SR)以及生物炭和秸秆联合施用(BS)对土壤理化性质和溶解有机质(DOM)特性的影响。结果表明:与对照(CK)相比,BR、SR和BS处理显著增加玉米产量和生物量、土壤团聚体平均重量直径以及亮氨酸氨基肽酶活性。此外,与CK相比,BR显著降低腐殖化指数(HIX)10.0%,显著增加活性有机碳和速效磷含量,增幅分别达35.6%和51.3%;SR显著增加激发波长为355 nm时发射波长为440~470 nm范围内最大荧光强度(Fn(355))、HIX、DOM在254 nm处的吸光度值与溶解有机碳浓度的比值(SUVA254)和全氮/全磷,增幅分别达43.6%,4.1%,45.5%和18.8%;BS显著提高土壤pH、有机碳/全磷、速效钾含量和DOM在250 nm处与365 nm处吸光度值的比值(E2/E3)。总体上,施用生物炭可降低DOM腐殖化程度和复杂性,但会提高土壤活性有机碳含量,而秸秆还田可增加DOM腐殖化程度和复杂性。
英文摘要:
      A three-year (2016—2018) field trial was conducted at the Changchun Comprehensive Experiment Station of the Northeast Institute of Geography and Agroecology, Chinese Academy of Science, which is located in Changchun city, Jilin province, China. The purpose of this study was to investigate the effects of biochar (BR), straw (SR) and combination of biochar and straw (BS) on physicochemical properties and dissolved organic matter (DOM) characteristics of black soil. The results showed that the BR, SR and BS treatments significantly increased the maize yield and biomass, mean weight diameter of soil aggregates, and leucine amino peptidase activity compared with the control (CK). In addition, compared with the CK treatment, the BR treatment significantly reduced the humification index (HIX) by 10.0% and significantly increased the contents of KMnO4-oxidizable carbon and available phosphorus by 35.6% and 51.3%, respectively. Meanwhile, compared with the CK treatment, the SR treatment significantly increased the maximum fluorescence intensity of emission wavelengths of 440~470 nm, when excitation wavelength was 355 nm (Fn (355)), HIX, the ratio of the absorbance at 254 nm to the dissolved organic carbon concentration (SUVA254) and total nitrogen/total phosphorus by 43.6%, 4.1%, 45.5% and 18.8%, respectively. Moreover, the BS treatment significantly increased soil pH, organic carbon/total phosphorus, available potassium contents and the ratio of absorbance at 250 nm to absorbance at 365 nm (E2/E3) compared with the CK treatment. In general, biochar application could reduce the humification degree and complexity of DOM and improve the content of soil labile organic carbon, whereas straw return could enhance the humification degree and complexity of DOM.
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