有机液肥对川中丘陵区土壤团聚体及其碳氮分配的影响  

Effects of organic liquid fertilizer on soil aggregates and their carbon and nitrogen partitioning in hilly areas of central Sichuan Province

作　　者：周宏宇 钱虹宇 周力 胡玉福 黄俊强 李垚岑 黄鑫河 曹文 ZHOU Hong-yu;QIAN Hong-yu;ZHOU Li;HU Yu-fu;HUANG Jun-qiang;LI Yao-cen;HUANG Xin-he;CAO Wen(College of Resources,Sichuan Agricultural University,Chengdu Sichuan 611130;Yibin Academy ofAgricultural Sciences,Yibin Sichuan 644600)

机构地区：[1]四川农业大学资源学院,四川成都611130 [2]宜宾市农业科学院,四川宜宾644600

出　　处：《中国土壤与肥料》2025年第1期15-23,44,共10页Soil and Fertilizer Sciences in China

基　　金：四川省科学技术厅重点研发项目(2022YFS0469)。

摘　　要：为了揭示有机液肥对土壤团聚体稳定性及有机碳、全氮分布的影响,通过模拟施肥试验,设置不施肥(CK)、常规施肥(CF)、液态碳肥与无机肥配施(PF)3个处理,施肥包括首次施肥和追肥,深度约15 cm,不同处理的施肥量相同,采集土壤样品测定团聚体、有机碳和全氮含量,探讨了液态有机碳肥配施无机肥和常规施肥下对四川省安岳县石灰性紫色土土壤团聚体分布以及不同粒径团聚体碳、氮含量的影响。结果表明:与CK相比,CF和PF处理分别显著提高了土壤>0.25 mm机械稳定性团聚体2.54%和1.07%,水稳定性团聚体差异不显著。CF和PF处理的团聚体平均重量直径(MWD)和几何平均直径(GMD)较CK处理显著提高。CF和PF处理较CK优化了土壤团聚体有机碳、全氮含量与分布,增加了土壤总有机碳、全氮和大团聚体(>0.25 mm)有机碳、全氮含量。相关分析表明,MWD、GMD和>0.25 mm团聚体百分含量(R_(0.25))呈线性正相关,团聚体破碎率(PAD)和土壤团聚体不稳定团粒指数(E_(LT))与R_(0.25)呈线性负相关,MWD、GMD与>0.25 mm团聚体有机碳含量均呈极显著正相关,GMD与>0.25 mm团聚体全氮含量均呈显著正相关,团聚体PAD与>0.25 mm团聚体全氮含量均呈显著负相关。由此可见,液态有机碳肥配施无机肥能提高土壤养分含量及有效性,增加土壤大团聚体比例和有机碳、全氮含量,提高土壤团聚体稳定性,有利于土壤肥力的提高。In order to reveal the effect of organic liquid fertilizer on soil aggregate stability and organic carbon and total nitrogen distribution,this paper simulated the fertilization test,three treatments were set up,including no fertilization(CK),conventional fertilization(CF),liquid carbon fertilizer and inorganic fertilizer(PF).The application of fertilizers included twice application of fertilizers in the depth of about 15 cm,the same amount of fertilizers were applied to the different treatments.Soil samples were collected for the determination of the content of the agglomerates,organic carbon and total nitrogen,and the effect of liquid organic carbon fertilizers with the application of inorganic fertilizers and conventional fertilizers on the distribution of the soil aggregates of the calcareous purple soils in Anyue County,as well as the content of carbon and nitrogen in the different grain sizes of the agglomerates were explored.The results showed that the CF and PF treatments significantly increased soil>0.25 mm mechanically stable aggregates by 2.54%and 1.07%,respectively compared with CK,and the difference in water stable aggregates was not significant.The mean mass diameter(MWD)and geometric mean diameter(GMD)of aggregates were significantly higher in the CF and PF treatments,compared with CK.The CF and PF treatments optimized the organic carbon and total nitrogen content and distribution of soil aggregates,compared to CK treatment,and increased soil total organic carbon,total nitrogen and the organic carbon and total nitrogen content of large aggregates(>0.25 mm).Correlation analysis showed that MWD,GMD and the percentage content of>0.25 mm aggregates(R_(0.25))were linearly positively correlated,the percentage of aggregate fragmentation(PAD)and the index of unstable soil aggregates(E_(LT))were linearly negatively correlated with R_(0.25),and the organic carbon content of MWD and GMD and>0.25 mm aggregates were all significantly positively correlated,and the total nitrogen content of>0.25 mm aggregates were

关 键 词：川中丘陵区 有机液肥 土壤团聚体 有机碳 全氮 

分 类 号：S152[农业科学—土壤学] S141[农业科学—农业基础科学]