灌溉方式对蔬菜栽培设施土壤黑碳的影响  

Effects of Different Irrigation Modes on Soil Black Carbon in Greenhouse

作　　者：薛媛媛[1] 张玉龙[1] 党秀丽[1] 

机构地区：[1]沈阳农业大学土地与环境学院,沈阳110866

出　　处：《土壤》2014年第6期997-1002,共6页Soils

基　　金：国家重点基础研究发展计划(973计划)子课题项目(2011CB100502);沈阳市科技攻关项目(F11-117-3-00;1091108-3-02)资助

摘　　要：采集连续13年定位灌溉试验的蔬菜栽培设施0-20 cm和20-40 cm两层土壤样品,测定总有机碳、黑碳和腐殖酸含量,探讨沟灌、滴灌和渗灌处理对土壤黑碳含量的影响及黑碳与其他形态土壤有机碳的关系。结果表明,各种有机碳组分含量均以0-20 cm土层最高;3种灌溉处理间0-20 cm和20-40 cm土层总有机碳、黑碳含量差异明显,总体上呈滴灌最高、渗灌次之、沟灌最少分布趋势;腐殖酸含量则为沟灌〉滴灌〉渗灌。在0-20 cm土层,总有机碳、黑碳、腐殖酸含量变化范围分别为21.15-25.53、5.30-7.59和3.64-5.75 g/kg;在20-40 cm土层,三者含量范围分别为11.62-17.55、3.39-5.40和3.54-3.83 g/kg。0-40 cm土层黑碳、腐殖酸占总有机碳的比例分别在22.81%-30.85%和16.60%-33.03%之间。土壤中黑碳与总有机碳之间具有极显著的相关性,而与腐殖酸不具有相关性。Soil samples within 0 – 20 cm and 20 – 40 cm were collected from different irrigation modes（furrow irrigation（FI）, drip irrigation（DI） and subsurface irrigation（SI）） in the same protected field where the irrigation experiment was continued for 13 years to research the effects of different irrigation modes on black carbon（BC） and the relationship between black carbon and other organic carbon fractions in greenhouse. The results suggested that the contents of TOC, BC and SHC all showed the biggest amount in 0 – 20 cm and there were significant differences within different layers for irrigation modes. The contents of TOC and BC within 0 – 20 cm and 20 – 40 cm generally presented the trend DI 〉SI〉 FI, while that of SHC was FIDISI. The content ranges of TOC, BC and SHC were 21.15 – 25.53, 5.30 – 7.59 and 3.64 – 5.75 g/kg in 0 – 20 cm and were 11.62 – 17.55, 3.39 – 5.40 and 3.54 – 3.83 g/kg in 20 – 40 cm, respectively. The contents of BC and SHC accounted for 22.81% – 30.85% and 16.60% – 33.03% of TOC respectively within 0 – 40 cm soil layer. There were significant positive correlation between soil BC and TOC, but not between BC and SHC.

关 键 词：保护地 灌溉方式 黑碳 腐殖酸 

分 类 号：S158.2[农业科学—土壤学]