%0 Journal Article %T 长期施肥对典型潮土钙、镁形态转化及其环境行为的影响 %T Effects of Long-term Fertilization on Calcium and Magnesium Morphological Transformation and Environmental Behavior in Typical Fluvo-aquic Soil %A 王擎运,张佳宝,赵炳梓,信秀丽,陈 林,周云鹏,郜红建 %A WANG,Qingyun %A ZHANG,Jiabao %A ZHAO,Bingzi %A XIN,Xiuli %A CHEN,Lin %A ZHOU,Yunpeng %A GAO,Hongjian %J 土壤 %J Soils %@ 0253-9829 %V 52 %N 3 %D 2020 %P 476-481 %K 长期施肥;钙、镁形态;土壤缓冲体系;有机质稳定 %K Long-term fertilization; Morphology of calcium and magnesium; Soil buffering system; Stabilization of organic matter %X 研究了长期(1989—2009年)不同施肥处理下潮土钙、镁累积特征及形态转化规律,探讨了两种典型盐基阳离子及其碳酸盐在农田土壤酸碱缓冲性能、有机质累积等环境过程中的作用。田间试验设置7个处理:有机肥(OM)、OM+无机化肥氮磷钾(NPK)、NPK、NP、PK、NK和不施肥(CK), OM+NPK处理为有机肥和无机化肥氮磷钾各施一半。气量法结合BCR形态分析结果显示,不同施肥条件下潮土耕层(0 ~ 20 cm)钙、镁元素均出现持续累积过程,不同处理的累积量表现为:NK2+, Mg2+ and carbonate to soil buffering ability and organic matter accumulation were explored. 7 fertilization treatments were designed in the field experiment: 1) CK (non-fertilized control), 2) OM (organic manure), 3) OM + NPK (50% organic manure + 50% mineral fertilizer), 4) NPK, 5) NP, 6) PK and 7) NK. The results obtained by volume method and the modified BCR-sequential extraction method showed that the contents of Ca and Mg in topsoil (0-20 cm) accumulated continuously, and were in the order of NK < OM < OM+NKP < NPK < NP < PK < CK, which was in accordance with the contents of soil crystal lattice-bound Ca and Mg and carbonate-bound Ca and Mg, while contrary to the contents of metal oxide-bound and organo-bound Ca and Mg. pH, contents of Ca and Mg were lower under OM treatment, but OM treatment had little impact on the content of soil carbonate. CaCO3 is the main carbonates in soil, followed by MgCO3, they are bound to soil organic matter to form a complex acid-base buffering system in soil. Compared with Mg2+, Ca2+ are easier to bind to the metallic oxide, whereas are weaker to be bound to soil organic matter, which may inhibit the formation of soil organo-mineral complexes. %R 10.13758/j.cnki.tr.2020.03.008 %U http://soils.issas.ac.cn/tr/home %1 JIS Version 3.0.0