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应用生态学报 ›› 2018, Vol. 29 ›› Issue (6): 1960-1968.doi: 10.13287/j.1001-9332.201806.025

• 研究报告 • 上一篇    下一篇

连续施用无害化污泥堆肥对沙质潮土活性有机氮组分的影响

郭康莉1,郑江1,冀拯宇1,刘晓1,朱兴娟2,姜慧敏1,杨俊诚1,张建峰1*   

  1. 1中国农业科学院农业资源与农业区划研究所,耕地培育技术国家工程实验室, 北京 100081;
    2华中农业大学资源与环境学院, 武汉 430070
  • 收稿日期:2017-08-28 修回日期:2018-03-03 出版日期:2018-06-18 发布日期:2018-06-18
  • 通讯作者: E-mail: zhangjianfeng@caas.cn
  • 作者简介:郭康莉,女,1993年生,硕士研究生.主要从事土壤污染与防治研究. E-mail: camille19932016@outlook.com
  • 基金资助:

    本文由国家自然科学基金项目(21577172,41501322)、国家国际科技合作专项(2015DFA20790)、国家重点基础研究发展规划项目(2013CB127406)、中央级公益性科研院所科研业务费专项(1610132016043)和国家重点研发计划项目(2016YFE0101100)资助

Effects of consecutive application of composted sewage sludge on active organic nitrogen fractions in the sandy fluvo-aquic soil.

GUO Kang-li1, ZHENG Jiang1, JI Zheng-yu1, LIU Xiao1, ZHU Xing-juan2, JIANG Hui-min1, YANG Jun-cheng1, ZHANG Jian-feng1*   

  1. 1National Engineering Laboratory for Improving Quality of Arable Land, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
    2College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
  • Received:2017-08-28 Revised:2018-03-03 Online:2018-06-18 Published:2018-06-18
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21577172, 41501322), the International Science and Technology Cooperation Project of China (2015DFA20790), the National Basic Research Program of China (2013CB127406), Fundamental Research Fund for Central Non-profit Scientific Institution (1610132016043) and the National Key Research and Development Program (2016YFE0101100).

摘要: 以河南省沙质潮土为研究对象,通过2012—2016年田间连续定位试验,在小麦-玉米轮作制度下,研究单施化肥(CK)、添加污泥堆肥(CS)15 t·hm-2(CS1)、30 t·hm-2(CS2)和45 t·hm-2(CS3)对土壤活性氮各组分及其分配比例的影响.结果表明: 连续施用污泥堆肥能够显著提高土壤含水率,降低土壤pH,提高土壤有机碳、全氮和速效养分含量,其中全氮(TN)含量显著增加了93.1%~284.3%;施用污泥堆肥45 t·hm-2显著提高了土壤轻组有机氮(LFON)、颗粒有机氮(PON)和微生物生物量氮(MBN).污泥堆肥促进了颗粒态有机氮(PON/TN)和微生物生物量氮(MBN/TN)分配,在CS2处理下分别显著提高了12.3%和539.9%,而降低了土壤轻组有机氮(LFON/TN)和溶解性有机氮(DON/TN)分配,分别降低了17.3%~40.1%和38.5%~71.3%.总体上,活性氮组分对TN的贡献为:PON>LFON>DON>MBN.主成分分析表明,CS2和CS3处理下活性氮含量及其分配比例载荷值较高;冗余分析表明,土壤理化指标(pH除外)和生物学指标与活性氮含量及其分配比例呈正相关.污泥堆肥可提供大量稳定性有机物质,影响土壤物理、化学和生物学特性,促进土壤氮素向活性氮的形式转化,当污泥堆肥施用量达30、45 t·hm-2时培肥效果显著,可用作沙质潮土的改良材料.

Abstract: A field experiment was conducted with sandy fluvo-aquic soil under wheat-maize rotation system during 2012 to 2016 in Henan Province, with four treatments: Chemical fertilizer (CK), composted sewage sludge (CS) 15 t·hm-2(CS1), 30 t·hm-2(CS2), 45 t·hm-2(CS3). We investigated the effects of CS on soil active organic nitrogen and its allocation ratio. Results showed that CS significantly enhanced soil water content, decreased soil pH, increased contents of soil organic carbon and total nitrogen (TN) and available nutrients. Soil TN was increased by 93.1%-284.3%. The CS3 treatment significantly improved the content of light fraction organic nitrogen (LFON), particulate organic nitrogen (PON) and microbial biomass nitrogen (MBN). CS treatments promoted the allocation of PON/TN and MBN/TN. with an enhancement of 12.3% and 539.9% in the CS2 treatment, respectively. The distributions of LFON/TN and DON/TN were decreased by 17.3%-40.1% and 38.5%-71.3%, respectively. The contribution of soil active organic nitrogen fractions to TN was: PON>LFON>DON>MBN. Results from the principal component analysis showed that organic nitrogen and their distribution had high load value in CS2 and CS3 treatments. Results from redundancy analysis showed that positive correlations existed between the soil physicochemistry, enzymatic activity and soil active organic nitrogen as well as their distribution. In summary, CS had positive impacts on soil organic matter, soil properties, and the formation of active organic nitrogen. The rates of 30 and 45 t·hm-2 CS application had significant effects on soil fertility, which could be an effective way to improve sandy fluvo-aquic soil quality.