有机肥对设施土壤硝态氮垂直分布的影响  

Effects of Different Organic Manure Rate on NO_3^-—N Distribution under Depth Profile of Protected Cultivation Soil

作　　者：张迪[1,2] 赵牧秋[1] 牛明芬[2] 王少军[1,2] 史奕[1] 

机构地区：[1]中科院沈阳应用生态研究所污染生态与环境生态工程研究中心,辽宁沈阳110016 [2]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《土壤通报》2011年第5期1148-1152,共5页Chinese Journal of Soil Science

基　　金：国家科技支撑计划项目(2008BADA7B08);国家自然科学基金项目(30970479)资助

摘　　要：以辽宁省新民市某设施蔬菜大棚为研究对象,研究在保护地栽培条件下不同有机肥施用量对不同施肥年限的设施土壤(0~120 cm土层)硝态氮累积和淋溶的影响。结果表明,土壤硝态氮的垂直分布与土壤的施肥年限和有机肥施用水平密切相关。在不同施肥处理条件下,施肥1年后各处理土壤剖面硝态氮累积和淋溶程度均很低;施肥2年后硝态氮累积迁移显著,尤其是高量有机肥的投入(处理M4),设施土壤0~120 cm土层都出现硝态氮淋洗现象。在不同施肥年限下,中高量有机肥处理都存在不同程度的硝态氮累积现象,硝态氮累积量随施肥量和施肥年限的增加而增加,随土壤深度的增加而降低,累积峰值集中在0~60 cm土层。A field experiment was carried out in Xinmin suburb to study the effects of different organic manure rates and fertilization years on accumulation and leaching of NO3-—N under depth profile of greenhouse soil.The results showed that the different planting years and organic manure level had effects on vertical distribution of NO3-—N in protected cultivation soil.Under different organic manure rates,the degree of NO3-—N accumulation and leaching were very low after the first planting year,but migrating phenomenon was conspicuous after 2 years.Especially throwing into high amount of organic fertilizer（M4）,leaching behavior appeared among 0-120 cm of soil profile.There were different levels of NO3-—N accumulation in different planting years when the amount of organic manure rate was higher.The NO3-—N content increased with the rising of the amount of organic manure applied and reduced following the increase of soil depth.Moreover,the accumulation peak mainly distributed in 0-60 cm soil profiles.

关 键 词：设施土壤 有机肥 硝态氮 

分 类 号：X53[环境科学与工程—环境工程]