耕作措施对旱农区农田土壤质量与碳排放的影响

被引：11

作者：

沈吉成 ^{[1
,2
,3
]}

赵彩霞 ^{[2
,3
]}

刘瑞娟 ^{[2
,3
]}

叶发慧 ^{[2
,3
]}

李亚鑫 ^{[2
,3
]}

李玲玲 ^{[1
]}

陈文杰 ^{[2
,3
]}

机构：

[1] 省部共建干旱生境作物学国家重点实验室(甘肃农业大学)

[2] 中国科学院高原生物适应与进化重点实验室中国科学院西北高原生物研究所中国科学院种子创新研究院

[3] 青海省作物分子育种重点实验室

来源：

中国土壤与肥料 | 2022年 / 01期

关键词：

旱农区; 土壤质量; 土壤碳排放与碳平衡; 耕作措施; 秸秆还田;

D O I：

暂无

中图分类号：

S153.6 [土壤成分];

学科分类号：

090301 [土壤学];

摘要：

依托2001年布设在陇中旱农区的田间定位试验，于2018年研究了传统耕作（T）、免耕（NT）、传统耕作+秸秆还田（TS）和免耕+秸秆覆盖（NTS）对麦豆轮作体系下豌豆田土壤碳排放、土壤质量的影响。研究结果表明：1)NTS处理可以提高黄绵土土壤质量。NTS处理下土壤物理、化学和生物学质量均最高；2)NT、NTS可以减少黄绵土土壤碳排放量，增强土壤碳汇功能。各处理下土壤碳排放量表现为T>TS>NTS>NT。较T处理，NTS、NT处理下碳排放量分别减少21.58%、22.96%；不同处理下土壤碳排放效率（CEE）表现为NTS>NT>TS>T,NTS、NT和TS处理下土壤CEE较T处理分别提高了91.43%、34.29%和28.57%;T处理下豌豆田生态系统碳平衡（NEP）最低，NTS处理下最高；且较T处理，NTS处理下NEP显著提高114.18%,NTS处理下豌豆田表现为碳汇。因此，在陇中旱农区采取免耕秸秆覆盖的保护性耕作措施，既可以提高土壤质量，也可以减少土壤碳排放，增强农田土壤碳汇功能，是有利于陇中旱农区农田生产力水平持续提高的适宜耕作措施。

引用

页码：122 / 130

页数：9

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