不同施肥对阴山北麓旱作农田土壤呼吸的影响

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	不同施肥对阴山北麓旱作农田土壤呼吸的影响
	李焕春 1; 严昌荣 1; 赵沛义 2; 妥德宝 2; 刘爽 1; 安昊 2
刊名	华北农学报
	2012
卷号	27 期号:5 页码:224-229
关键词	施肥土壤呼吸地温生物量土壤水分
ISSN号	1000-7091
其他题名	Effect of Different Fertilization on Soil Respiration Flux in Arid Farmland of North Area of Yinshan
英文摘要	为探讨不同施肥措施对土壤呼吸的影响,采用动态箱-红外CO_2分析法在阴山北麓旱作马铃薯种植区,对施有机肥、有机无机配施、施化肥、不施肥4种施肥措施下土壤呼吸效率及其对水热及生物因子的动态响应过程进行测定分析。结果表明,不同施肥处理下的土壤呼吸速率均有明显的日变化,呈单峰曲线,6:00-8:00时最慢,12:00-16:00时最快,呼吸速率日变化与10 cm地温呈显著正相关。与不施肥相比,施肥显著增加了一天之中各时段的土壤呼吸速率(P<0.05),但不同施肥措施之间的差异在不同时段表现不同。呼吸速率的季节变化也呈单峰曲线,在出苗后52 d达到最大值,呼吸的季节变化受水热及生物因子的协同作用,在整个生育期内与干物质的日积累速率和耕层0~20 cm土壤水分显著相关,生育前期(出苗后0~52 d)呼吸速率随马铃薯全株及块茎积累总量的增加而增加,生育后期(出苗后52~98 d)和收获后(出苗后98~142 d)随10 cm地温的降低而降低。不同施肥措施通过促进作物生长,调节土壤C/N值等,显著增加了土壤呼吸速率(P<0.01),大小顺序为:施有机肥>有机无机配施>施化肥。; In order to discuss the effects of fertilization on soil respiration in the potato field in North of Yinshan in 2010,Soil CO_2 respiration fluxes and soil temperature and moisture and biotic factors were measured in a long term experiment.The results showed that the diurnal variation of soil respiration showed asymmetric pattern,with the minimum value occurring around 6:00-8:00 hours and the maximum value around 12:00-16:00 hours.Furthermore,there was a significant linear relationship between soil respiration and soil temperature at 10 cm depth.The differences among 4 treatments were not same in different time of one day.The seasonal variations of soil respiration responded to the coordinated effects of soil temperature and moisture and biotic factors.During the whole growing season there was a significant relationship between soil respiration and potato dry matter accumulation rate and soil moisture at 0-20 cm depth.The soil respiration increased with the increasing of weight of potato during the early stage(0-52 days after emergence),and decreased with the soil temperature decreasing during the late stage(98-142 days after emergence).The soil respiration rate was increased by applying fertilizer significantly and the order was applying matter(M)> applying manure and NPK chemical fertilizer(NPKM)> applying chemical fertilizer(NPK)> non fertilization(CK).This result is mainly because of the potato growing faster and the C/N were adjusted to a fitting rage and the biomass was increased by applying fertilizer.
学科主题	农业基础科学 ; 农作物
语种	中文
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/17055]
专题	农业环境与可持续发展研究所_旱作节水研究室
作者单位	1.中国农业科学院农业环境与可持续发展研究所, 农业部旱作节水农业重点试验室, 北京, 100081 2.内蒙古农牧业科学院植物营养与分析研究所, 内蒙古, 呼和浩特, 010031
推荐引用方式 GB/T 7714	李焕春,严昌荣,赵沛义,等. 不同施肥对阴山北麓旱作农田土壤呼吸的影响[J]. 华北农学报,2012,27(5):224-229.
APA	李焕春,严昌荣,赵沛义,妥德宝,刘爽,&安昊.(2012).不同施肥对阴山北麓旱作农田土壤呼吸的影响.华北农学报,27(5),224-229.
MLA	李焕春,et al."不同施肥对阴山北麓旱作农田土壤呼吸的影响".华北农学报 27.5(2012):224-229.