双季稻酸紫泥田土壤健康对连续单施有机肥、石灰的响应  

Response of Paddy Soil Health to Continuous Amendments of Organic Fertilizer and Lime Separately Under Double-Cropping Rice Fields

作　　者：尹泽润 盛浩[1] 刘鑫[1] 肖华翠 张丽娜[1] 李源钊 田宇 周萍[2] YIN ZeRun;SHENG Hao;LIU Xin;XIAO HuaCui;ZHANG LiNa;LI YuanZhao;TIAN Yu;ZHOU Ping(College of Resources,Hunan Agricultural University,Changsha 410128;Key Laboratory of Agro-Ecological Processes in Subtropical Region,Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha 410125)

机构地区：[1]湖南农业大学资源学院,长沙410128 [2]中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室,长沙410125

出　　处：《中国农业科学》2023年第19期3829-3842,共14页Scientia Agricultura Sinica

基　　金：湖南省重点研发计划项目(2023NK2026);科技基础资源调查专项课题(2021FY100504);2021年湖南省研究生科研创新项目(CX20210677)。

摘　　要：【目的】为明确双季稻酸紫泥田土壤健康对连续单施有机肥、石灰的响应规律,验证不同土壤健康评价方法在水稻土健康评价中的适应性、敏感性及筛选敏感指示指标。【方法】选取长江中下游植稻区双季稻酸紫泥田作为研究对象,基于配对试验设计的原则,设置对照和处理田块,研究连续6年单施有机肥、石灰后,土壤物理、化学、生物学共24项指标的变化规律,应用康奈尔土壤健康评价(CASH)、Haney土壤健康测试(HSHT)及主成分分析结合最小数据集(MDS),构建综合土壤健康指数,评估土壤健康的响应差异。【结果】与对照相比,单施有机肥的土壤容重、紧实度、微团聚体(<0.25 mm)含量分别显著下降14%、25%和32%,0.5—1 mm团聚体、铵态氮、活性有机碳、水溶性有机碳和氮、土壤呼吸与柠檬酸盐可浸提蛋白含量分别显著上升100%、37%、54%、21%、44%、59%和8%,最小数据集(MDS)、康奈尔土壤健康(CASH)、2015、2018及Ward实验室(SHS)版本的Haney土壤健康测试(HSHT)指数,分别显著提高75%、20%、42%、95%和55%(P<0.05);与对照相比,连续石灰处理土壤的紧实度、微团聚体、水溶性有机氮和pH分别显著上升44%、22%、61%和0.57个单位,但0.5—1 mm团聚体、有效态锌含量和土壤呼吸分别显著下降39%、14%和52%,MDS、CASH和SHS HSHT指数分别显著下降59%、15%和47%(P<0.05)。【结论】连续6年单施有机肥和石灰后,总体上对双季稻酸紫泥田的土壤健康分别产生了正面和负面作用。土壤健康指数无法反映本试验土壤的总镉累积量及其有效性的变化,镉超标水稻土健康评价方法仍有待开发。【Objective】The aim of this study was to investigate the mechanism of the comprehensive soil health of double-cropping rice fields in response to continuous organic fertilizer and quick lime amendments,and to verify the current major soil health assessment methods in terms of the adaptability,sensitivity,and their sensitivity indicators in paddy soils.【Method】Here the double-cropping rice fields in the middle and lower reaches of the Yangtze River watershed were selected.Based on the principles of experimental design,the control and treatment fields were set up.It aimed at illuminating the changes in topsoil physical,chemical,and biological indicators(24 indicators)after 6-year biannual continuous organic and quick lime amendments,and assessing the holistic soil health index using the Cornell Soil Health Assessment(CASH),the Haney Soil Health Test(HSHT),and the principal component analysis combined with minimal data set construction(MDS)methods.【Result】Compared with the control treatment(CK),6-year continuous organic amendment treatment reduced the soil bulk density,penetration resistance,and microaggregates(<0.25 mm)significantly by 14%,25%,and 32%,respectively;however,which rose the soil aggregate(0.5-1 mm),ammonium N,activated C,water extractable organic C and N,respiration rate,and autoclaved-citrate extractable protein significantly by 100%,37%,54%,21%,44%,59%,and 8%,respectively;in addition,the minimum data set(MDS),comprehensive assessment of soil health(CASH),2015,2018,and Ward Laboratory(SHS)versions of Haney soil health test(HSHT)indexes were significantly enhanced by 75%,20%,42%,95%,and 55%under 6-year continuous organic amendment treatment than that under CK,respectively(P<0.05).After the 6-year continuous liming,the soil penetration resistance,microaggregates,water extractable organic N,and pH were significantly increased by 44%,22%,61%,and 0.57 units than that under CK,respectively;whereas 0.5-1 mm soil aggregates,available Zn,and respiration decreased significantly by 39%,14%,and 52%unde

关 键 词：水稻土 土壤健康 土壤性质 土壤呼吸 有机肥 石灰 

分 类 号：S158[农业科学—土壤学]