|本期目录/Table of Contents|

[1]杨宏伟,王小利,龙大勇,等.秸秆和生物炭还田对稻田土壤有机碳及其矿化的影响[J].江苏农业科学,2023,51(11):226-232.
 Yang Hongwei,et al.Effects of straw and biochar returning on soil organic carbon and its mineralization in paddy field[J].Jiangsu Agricultural Sciences,2023,51(11):226-232.
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秸秆和生物炭还田对稻田土壤有机碳及其矿化的影响(PDF)
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《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第51卷
期数:
2023年第11期
页码:
226-232
栏目:
资源与环境
出版日期:
2023-06-05

文章信息/Info

Title:
Effects of straw and biochar returning on soil organic carbon and its mineralization in paddy field
作者:
杨宏伟1王小利1龙大勇1段建军2梅婷婷1徐彬1蒙婼熙1卢清涛1
1.贵州大学农学院,贵州贵阳 550025; 2.贵州大学烟草学院/贵州省烟草品质研究重点实验室,贵州贵阳 550025
Author(s):
Yang Hongweiet al
关键词:
水稻秸秆生物炭活性有机碳碳库管理指数有机碳矿化
Keywords:
-
分类号:
S151.9+3;S511.06
DOI:
-
文献标志码:
A
摘要:
通过对稻田土壤有机碳矿化特征及其活性组分的研究,为提高贵州黄壤稻田土壤固碳能力提供理论依据。设置4个处理:不施肥(CK)、单施化肥(NPK)、秸秆配施化肥(NPKS)和生物炭配施化肥(NPKB),结合室内矿化试验对土壤碳氮比(C/N)、活性有机碳(AOC)含量、碳库管理指数(CPMI)和有机碳矿化进行研究。结果表明,与NPK处理相比,NPKB处理SOC含量和C/N分别显著提高9.10%、23.10%,NPKS处理TN含量最高,与CK处理相比显著提高1939%。NPKS处理下,土壤易氧化有机碳(ROC)、可溶性有机碳(DOC)和微生物量碳(MBC)含量均最高,分别为588 g/kg、96.15 mg/kg和334.09 mg/kg。与NPK处理相比,NPKB处理显著增加了土壤稳态碳(SC)含量、碳库指数(CPI)和CPMI,对碳库活度(A)和碳库活度指数(AI)无显著影响,NPKS处理则显著增加了A、AI和CPMI。在培养期内,SOC矿化速率在第1天处于最大值,前期(第1~6天)大幅下降,后期(第6~45天)缓慢下降;第45天时,SOC累积矿化量在2.14~2.82 g/kg之间,而SOC累积矿化率在11.01%~15.51%之间,均以NPKB处理最低。SOC累积矿化量与MBC含量、ROC/SOC、A和AI呈显著正相关关系,与TN含量、DOC/SOC和MBC/SOC呈极显著正相关关系,与C/N呈极显著负相关关系。综上所述,秸秆与化肥配施,显著提高了土壤有机碳含量及其矿化程度,有机碳的稳定性下降;生物炭与化肥配施则对土壤的有机碳矿化具有显著的抑制作用,对土壤的固碳培肥起到积极作用。
Abstract:
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备注/Memo

备注/Memo:
收稿日期:2022-08-26
基金项目:国家自然科学基金(编号:31860160);贵州大学培育项目(编号:贵大培育[2019]12号)。
作者简介:杨宏伟(1998—),男,贵州六盘水人,硕士研究生,主要从事稻田土壤培肥研究。E-mail:2237341986@qq.com。
通信作者:王小利,博士,教授,主要从事土壤肥力与作物施肥研究。E-mail:xlwang@gzu.edu.cn。
更新日期/Last Update: 2023-06-05