4种改良剂对酸性紫色土肥力及活性有机碳组分的影响  

Effects of Four Amendments on Fertility and Labile Organic Carbon Fractions of Acid Purple Soil

作　　者：丁馨茹 严宁珍[1] 王子芳[1] 李志琦 黄容 王洋 代文才[1] 高明[1] DING Xin-ru;YAN Ning-zhen;WANG Zi-fang;LI Zhi-qi;HUANG Rong;WANG Yang;DAI Wen-cai;GAO Ming(College of Resources and Environment,Southwest University,Chongqing 400715,China;Chongqing Jiangjin District Agricultural Technology Extension Center,Chongqing 402260,China;College of Resources,Sichuan Agricultural University,Chengdu 611130,China)

机构地区：[1]西南大学资源环境学院,重庆400715 [2]重庆市江津区农业技术推广中心,重庆402260 [3]四川农业大学资源学院,成都611130

出　　处：《环境科学》2024年第3期1655-1664,共10页Environmental Science

基　　金：国家自然科学基金项目(42177019);重庆市技术创新与应用发展专项重点项目(cstc2019jscx-tjsbX0001);四川省自然科学基金项目(2022NSFSC0100)。

摘　　要：探究4种改良剂施用对酸性紫色土土壤肥力及活性碳组分特征影响,为紫色土养分管理及稳固碳库提供科学依据.采用田间试验,设置不施肥(CK)、单施化肥(F)、石灰+化肥(SF)、有机肥+化肥(OM)、生物炭+化肥(BF)及酒糟灰渣+化肥(JZ)这6个处理,研究不同处理土壤有机质、 pH、速效养分、土壤综合肥力指数(IFI)、溶解性有机碳(DOC)、微生物量碳(MBC)、颗粒有机碳(POC)含量及各组分有效率和土壤碳库管理指数(CPMI),阐明其相互关系.结果表明:(1)施用改良剂显著提高了土壤pH及有机质、碱解氮、速效磷、速效钾含量(P<0.05),有机肥+化肥(OM)和酒糟灰渣+化肥(JZ)处理土壤综合肥力指数提高最为显著(P<0.05),较对照分别提高了1.96和0.77,增幅分别为170.43%和66.96%.(2)酒糟灰渣+化肥(JZ)和有机肥+化肥(OM)处理土壤POC、 MBC和DOC含量较对照处理分别提高了110.30%和84.81%、 61.08%和46.56%、 195.87%和141.67%;改良剂的施用均显著提高了土壤碳库指数(CPI)和碳库管理指数(CMPI)(P<0.05),其中以有机肥+化肥(OM)处理提高最为显著,土壤CPI值和CMPI值较对照分别增加了107.34%和90.75%.(3)土壤有机碳及其活性组分与土壤综合肥力指数呈显著正相关(P<0.05),冗余分析表明施用改良剂各处理间分异性显著,土壤IFI、 pH和速效钾对有机碳及其组分的解释率均达到显著水平,解释率顺序分别为:IFI(74.6%)>pH(11.7%)>AK(6.5%).酸性紫色土施用酒糟灰渣和有机肥提高土壤肥力和改良土壤质量效果最显著,同时有利于促进土壤碳组分的积累和活化.The aim of this study was to explore the effects of four amendments on soil fertility and labile carbon fraction characteristics of acid purple soil,so as to provide scientific basis for nutrient management and carbon storage stability in purple soil.Field experiments were carried out,and six treatments were set up:no fertilization(CK),only chemical fertilizer(F),lime+chemical fertilizer(SF),organic fertilizer+chemical fertilizer(OM),biochar+chemical fertilizer(BF),and vinasse biomass ash+chemical fertilizer(JZ).The contents of soil organic matter,pH,available nutrients,soil integrated fertility index(IFI),dissolved organic carbon(DOC),microbial biomass carbon(MBC),particulate organic carbon(POC),their effective rates,and soil carbon pool management index(CPMI)under different treatments were studied to clarify their relationships.The results showed that:①the application of amendments significantly increased soil pH and the contents of organic matter,alkali-hydrolyzed nitrogen,available phosphorus,and available potassium(P<0.05).The OM and JZ treatments had the most significant increase in soil comprehensive fertility index(P<0.05),with increases of 1.96 and 0.77 and 170.43%and 66.96%,respectively.②Compared with those in the control treatment,the contents of POC,MBC,and DOC in JZ and OM increased by 110.30%and 84.81%,61.08%and 46.56%,and 195.87%and 141.67%,respectively.The application of amendments significantly increased the soil carbon pool index(CPI)and CMPI(P<0.05),in which the OM treatment showed the most significant increase,with soil CPI and CMPI values increasing by 107.34%and 90.75%compared with those of the control,respectively.③Soil organic carbon and its labile fractions were positively correlated with IFI(P<0.05),and redundancy analysis showed that there were significant differences among different treatments.The interpretation rates of soil IFI,pH,and available potassium to organic carbon and its components reached significant levels,and the order of interpretation rates was IFI(74.6%)>pH(11.7%

关 键 词：改良剂 紫色土 活性碳组分 综合肥力指数(IFI) 碳库管理指数(CPMI) 

分 类 号：X144[环境科学与工程—环境科学]