[1]张世汉,武均,张仁陟,等.施氮对陇中黄土高原旱作农田土壤颗粒态有机碳的影响[J].水土保持研究,2019,26(06):7-11.
　ZHANG Shihan,WU Jun,ZHANG Renzhi,et al.Effects of Different Nitrogen Addition Levels on Soil Particulate Organic Carbon in Dry Farmland of Central Gansu Province on the Loess Plateau[J].Research of Soil and Water Conservation,2019,26(06):7-11.
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施氮对陇中黄土高原旱作农田土壤颗粒态有机碳的影响

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 26 期数: 2019年06期 页码: 7-11 栏目: 出版日期: 2019-10-17
Title:
Effects of Different Nitrogen Addition Levels on Soil Particulate Organic Carbon in Dry Farmland of Central Gansu Province on the Loess Plateau
作者:
张世汉1, 武均1,2, 张仁陟1,2,3, 蔡立群1,2,3, 齐鹏1,2, 张军1,2,3
1. 甘肃农业大学 资源与环境学院, 兰州 730070;
2. 甘肃农业大学 甘肃省干旱生境作物学重点实验室, 兰州 730070;
3. 甘肃省节水农业工程技术研究中心, 兰州 730070
Author(s):
ZHANG Shihan1, WU Jun1,2, ZHANG Renzhi1,2,3, CAI Liqun1,2,3, QI Peng1,2, ZHANG Jun1,2,3
1. College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, China;
2. Gansu Provincial Key Laboratory of Arid Land Crop Science, Gansu Agricultural University, Lanzhou 730070, China;
3. Gansu Engineering Research Center for Agriculture Water-Saving, Lanzhou 730070, China
关键词:
固碳能力; 施氮; 土壤总有机碳; 矿质结合态有机碳
Keywords:
carbon sequestration capacity; nitrogen application; soil total organic carbon; mineral-associated organic carbon
分类号:
S158.5;S153.6+2
摘要:
为探明不同施氮水平对陇中黄土高原旱作农田土壤有机碳的影响，以布设于2013年的施氮定位试验为研究对象，利用碘化钠重液分组法，探究了N0，N52.5，N105，N157.54种施氮水平对陇中黄土高原旱作农田土壤总有机碳（STOC）、游离态颗粒有机碳（FPOC）、闭蓄态颗粒有机碳（OPOC）、矿质结合态有机碳（MOC）的影响。结果表明：在0-20 cm土层，不同处理下STOC，FPOC，OPOC，MOC含量及FPOC/STOC，OPOC/STOC均随土层加深而降低，MOC/STOC随土层加深而增大。较N0处理，N52.5，N105，N157.5处理均可提升STOC，FPOC，OPOC含量以及FPOC/STOC，OPOC/STOC，且N105处理下提升效应最优；N105和N157.5处理可显著提升0-20 cm各土层MOC含量，且N105处理下提升效应最优。综上所述，N105处理可有效促进土壤固碳能力、节约投入成本，可筛选为该区春小麦栽培的合理施氮量。
Abstract:
In order to explore the effects of different nitrogen addition levels on soil organic carbon in dry farmland in central Gansu Province on the Loess Plateau, based on the nitrogen addition location experiment conducted at the Rainfed Agricultural Experimental Station of Gansu Agricultural University, Dingxi City, Gansu Province, in 2013, the density fractionation method[NaI:(1.70±0.02) g/cm3] was used to explore the effects of four nitrogen addition levels (N0, N52.5, N105, N157.5) on soil total organic carbon (STOC), free particulate organic carbon (FPOC), occluded particulate organic carbon (OPOC), mineral-associated organic carbon (MOC). The results showed that the contents of STOC, FPOC, OPOC, MOC, and FPOC/STOC, OPOC/STOC decreased with the increase of depth of soil layer under different treatments in the 0-20 cm soil layers, and MOC/STOC increased with the increase of depth of the soil layer; compared with the N0 treatment, N52.5, N105 and N157.5 treatments could increase the FPOC/STOC, OPOC/STOC and the contents of STOC, FPOC, OPOC, and N105 treatment had the best effect on these ratios; N105 and N157.5 treatments significantly increased the MOC content in 0-20 cm layer, and N105 treatment had the best effect on the increase of MOC content. In conclusion, N105 treatment can effectively promote soil carbon sequestration capacity, reduce input costs, and can be selected as the reasonable application amount of nitrogen fertilizer for spring wheat cultivation in this area.

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备注/Memo

收稿日期:2018-12-29;改回日期:2019-01-16。
基金项目:甘肃农业大学青年导师扶持基金（GAU-QNDS-2017-04）；国家自然科学基金（31571594，41661049）；甘肃省自然科学基金（1606RJZA076）
作者简介:张世汉(1992-),男,甘肃金塔人,硕士研究生,研究方向为恢复生态学。E-mail:1016625243@qq.com;武均(1989-),男,甘肃敦煌人,博士,研究方向为保护性耕作、土壤生态学。E-mail:wujun210@126.com
通讯作者:齐鹏(1979-),男,甘肃武威人,硕士生导师,主要从事土壤生态学研究。E-mail:gsauqip@gsau.edu.cn

更新日期/Last Update: 1900-01-01