水肥调控对土壤团聚体及有机碳的影响  

Effects of Water and Fertilizer Regulation on Soil Aggregates and Organic Carbon

作　　者：王学君[1] 董晓霞[1] 孙泽强[1] 田叶[1] 刘兆辉[1] 

机构地区：[1]山东省农业科学院土壤肥料研究所,山东济南250100

出　　处：《山东农业科学》2009年第9期64-66,69,共4页Shandong Agricultural Sciences

基　　金：国家科技支撑计划课题"黄淮海平原中低产土壤综合治理模式研究与示范(2006BAD05B04)";华北潮土及褐土;棕壤土区沃土技术模式研究与示范项目(2006BAD25B06);山东省农科院青年基金项目"水肥调控对土壤有机碳的影响(2007YQN042)"资助

摘　　要：采用三因素三水平正交试验，在大棚番茄田研究了不同水肥调控对土壤团聚体及有机碳的影响。结果表明，2-0.25mm的团聚体所占比例最大，达43％以上，大于2mm和小于0.25mm的团聚体含量所占比例较小；正常供水＋N1P1.5K0.8＋OM63和水胁迫＋N0.6P1.5K0.8＋OM94能显著提高土壤有机碳的含量，且有机碳主要分配在2-0.25mm的团聚体上；就产量来说，正常供水＋N1P1.5K0.8＋OM63是所有处理中产量最高的，而水胁迫＋N0.6P1.5K0.8＋OM94处理，产量很低。因此，从提高经济效益和土壤质量来讲，正常供水＋N1P1.5K0.8＋OM63是最好的方案。Using the orthogonal design with three factors and three leves, the effect of water and fertilizer regulating on soil aggregate and organic carbon in the tomato field were studied in greenhouse. The results showed that the proportion of 0.25-2.00 mm aggregates was the largest, which was more than 43%, while the aggregates larger than 2.00 mm and smaller than 0.25 mm were relatively few. The treatments of normal water supply ＋ N1P1.5K0.8＋ OM63and water stress ＋N0.6P1.5K0.8 ＋OM94 could significantly improve the or-ganic carbon content in soil, which distributed mainly on the 0.25-2.00 mm aggregates. The yield of the treatment normal water supply ＋ N1P1.5K0.8＋OM63 was the highest, while that of the treatment water stress ＋ N0.6 P1.5K0.8 ＋OM94 was very low. So normal water supply ＋ N1P1.5K0.8＋ OM63 was the best scheme for increasing the economic benefit and improving the soil quality.

关 键 词：水肥调控 土壤团聚体 有机碳 产量 

分 类 号：S158.5[农业科学—土壤学]