[1]胡延斌,肖国举,仇正跻,等.西北半干旱区农田土壤有机碳和全氮分布特征及其对地膜玉米产量的影响[J].水土保持研究,2021,28(01):58-64.
　HU Yanbin,XIAO Guoju,QIU Zhengji,et al.Distribution Characteristics of Soil Organic Carbon and Total Nitrogen and Its Influence on Film-Mulched Maize in Farmland in Northwest Semiarid Region[J].Research of Soil and Water Conservation,2021,28(01):58-64.
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西北半干旱区农田土壤有机碳和全氮分布特征及其对地膜玉米产量的影响

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 28 期数: 2021年01期 页码: 58-64 栏目: 出版日期: 2021-01-10
Title:
Distribution Characteristics of Soil Organic Carbon and Total Nitrogen and Its Influence on Film-Mulched Maize in Farmland in Northwest Semiarid Region
文章编号:
1005-3409(2021)01-0058-07
作者:
胡延斌1, 肖国举1, 仇正跻2, 戴君丽3, 李永平 4
(1.宁夏大学, 资源环境学院 环境工程研究院, 银川 750021; 2.宁夏六盘山花卉研究所, 宁夏 隆德 756302;3.宁夏彭阳县科学技术局, 宁夏 固原 756500; 4.宁夏农林科学院固原分院, 宁夏 固原 756000)
Author(s):
HU Yanbin1, XIAO Guoju1, QIU Zhengji2, DAI Junli3, LI Yongping4
(1.College of Resources and Environment & Institute of Environmental Engineering, Ningxia University, Yinchuan 750021, China; 2.Ningxia Liupanshan Flower Research Institute, Longde, Ningxia 756302, China; 3.Science and Technology Bureau of Pengyang County, Pengyang, Ningxia 756500, China; 4.Guyuan Branch of Ningxia Academy of Agriculture and Forestry Sciences, Guyuan, Ningxia 756000, China)
关键词:
半干旱区;  土壤有机碳;  全氮;  地膜玉米;  产量
Keywords:
semiarid district;  SOC;  TN;  film-mulched maize;  crop yield
分类号:
F301.21
文献标志码:
A
摘要:
探究西北半干旱区农田土壤碳氮含量以及不同碳氮含量对作物产量的影响,以期为保障国家粮食安全和耕地可持续发展提供决策依据。于2017—2018年连续两年在西北半干旱区彭阳县白阳镇、城阳乡和草庙乡,采用农田生态系统调查取样的研究方法,在地膜玉米的成熟期进行整株取样,围绕耕层土壤有机碳(SOC)、全氮(TN)及碳氮比(C/N)变化趋势,开展土壤碳氮对玉米产量的影响展开研究。测定玉米籽粒的产量组成和实际产量,深入理解农田土壤碳氮含量变化及其对作物产量的影响机理。对指导农田生态系统合理培肥、提高土壤养分利用和生产水平有着重要指导意义。结果表明:调查区域耕层土壤SOC,TN含量及C/N分别分布于4.00～14.00 g/kg,0.80～1.30 g/kg,5.00～13.00之间,且TN随SOC呈上升趋势。总体看,一定阈值内,土壤SOC,TN含量及C/N增加,对玉米增产呈现积极的正效应。耕作层土壤SOC含量为4.00～14.00 g/kg,SOC含量每增加1 g/kg,玉米增产0.79%～12.20%。耕作层土壤TN 0.80～1.10 g/kg时,TN含量,每增加0.1 g/kg,玉米增产4.6%～12.40%; TN含量1.10～1.30 g/kg时,TN含量,每增加0.1 g/kg,玉米减产11.86%～20.05%。耕层土壤C/N在5.00～13.00时,玉米增产1.55%～24.09%。在其他既定条件不便的情况下,西北半干旱区存在通过提高土壤碳氮含量来增加作物产量的潜力。一定阈值内,保持较高水平的土壤碳氮含量对西北半干旱地区节本增效具有十分显著的作用。因此,研究土壤碳氮含量对作物产量的影响,对保障国家粮食安全和耕地可持续利用具有十分重要的意义。
Abstract:
This research was conducted to explore the soil carbon and nitrogen contents of farmland soil and the influence of different carbon and nitrogen contents on crop yield in the semiarid region of northwest China, so as to provide theoretical basis for national food security and sustainable development of arable land. A two-year field research method of farmland ecosystem survey sampling was persistently performed in the semiarid area of northwest China. In 2017—2018, the survey areas were the towns such as Baiyang, Chengyang and Caomiao Town. The whole plant sampling was carried out at the mature stage of mulch maize, and the influence of soil carbon and nitrogen on maize yield was studied by centering on the variation trend of soil organic carbon(SOC), total nitrogen(TN)and carbon nitrogen ratio(C/N)in the topsoil. The yield composition and actual yield of maize seeds were determined to understand the change of the SOC and TN contents of farmland soils and their impacts on crop yield, which has important guiding significance for farmland ecosystem in fertilizer application, soil nutrient utilization and production. The results showed that the SOC, TN and C/N of the cultivated soil in the survey area were between 4.00～14.00 g/kg, 0.80～1.30 g/kg and 5.00～13.00, and the TN increased with the increase of SOC; overall, within a certain threshold, the increases in SOC, TN and C/N have the positive effect on rise of maize yield; when the surface SOC content is 4.00～14.00 g/kg, the SOC content increases by 1 g/kg, the maize yield increases by 0.79%～12.20%; when the surface TN content is 0.80～1.10 g/kg, the TN content increases by 0.1 g/kg, the maize yield increases by 4.60%～12.40%; when the surface TN content is 1.10～1.30 g/kg, the TN content increases by 0.1 g/kg, the maize yield decrease by 11.86%～20.05%; when the surface C/N content is 5.00～13.00, the maize yield increases by 1.55%～24.09%. In the case that other established conditions are unchanged, the semi-arid region in northwest China has the potential to increase crop yield by increasing soil carbon and nitrogen content. Within a certain threshold, maintaining a high level of soil carbon and nitrogen content has a very significant effect on cost-saving and efficiency in northwest semi-arid area. Therefore, it is very important to study the influence of soil carbon and nitrogen contents on crop yields to ensure national food security and sustainable use of cultivated land.

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备注/Memo

收稿日期:2020-03-07 修回日期:2020-04-09
资助项目:国家重点研发计划(2016YFC0501302); 国家自然科学基金(41665009); 宁夏科技创新领军人才计划(KJT2016006)
第一作者:胡延斌(1991—),女,河北邢台人,硕士研究生,研究方向为气候变化与农田生态系统碳循环。E-mail:985327920@qq.com 通信作者:肖国举(1972—),男,甘肃通渭人,博士,研究员,主要从事全球气候变化及其对农业生态系统的影响研究。E-mail:xiaoguoju1972@163.com

更新日期/Last Update: 2021-01-15