摘要
【目的】秸秆腐解产物具有改善土壤酸度、提高土壤抗酸化能力等作用。研究不同秸秆腐解产物对红壤复酸化的阻控效果及对作物生长的促进作用,为有效阻控酸性土壤复酸化提供新思路。【方法】供试土壤为花岗岩和玄武岩发育的赤红壤(pH 4.75)和砖红壤(pH 5.02),处理土壤样品为分别添加2%的水稻和豌豆秸秆腐解产物(RSD、PSD),对照为两类型土壤中添加Ca(OH)_2至pH分别与RSD和PSD相同(RCK、PCK),共8个样品。在黑暗处培养30天,用于盆栽试验处理。盆栽试验作物为玉米,在玉米收获后,分析土壤酸度、阳离子交换量、有机质、有效养分含量、微生物多样性,以及玉米植株地上部、根系生长和养分吸收量。【结果】赤红壤上RSD、RCK、PSD、PCK处理玉米收获后土壤的pH较播种前分别下降了0.11、0.60、0.92、1.04个单位,RCK、PSD、PCK处理的降幅达到显著水平;砖红壤上RSD处理玉米收获后的土壤pH较播种前升高了0.22个单位,而RCK、PSD、PCK处理分别下降了0.13、0.16、0.36个单位,PSD、PCK处理的降幅达到显著水平。在赤红壤上,4个处理间土壤交换性H+含量差异不显著,交换性Al~(3+)含量有所差异;在砖红壤上,RSD处理的交换性Al~(3+)含量显著高于RCK,PSD处理的交换性Al~(3+)含量则显著低于PCK。赤红壤上RSD和PSD处理的土壤阳离子交换量(CEC)分别比其石灰对照增加了27.11%和17.69%,砖红壤上则分别增加了10.10%和6.40%。秸秆腐解产物处理的土壤有机质、碱解氮、有效磷和速效钾含量均较石灰处理提升。施用秸秆腐解产物提升了厚壁菌门(Firmicutes)、放线菌门(Actinobacteria)、子囊菌门(Ascomycota)和担子菌门(Basidiomycota)的物种丰度,增加了玉米地上部和根部的生长及养分吸收。赤红壤上豌豆秸秆腐解产物处理的玉米株高、生物量、总根长、根表面积和根体积分别较其石灰对照增加了59.51%、738.43%、280.00%、392.8
【Objectives】Straw decayed products have been found of improving soil acidity and resisting soil acidification.This study compared the effects of two straw decayed products,to provide technological base for choosing efficient straws to inhibit the re-acidification of red soil.【Methods】The lateritic red soil(pH 4.75)and latosol soil(pH 5.02),derived from granite and basalt respectively,were used as test soils,2%of rice and pea straw decayed products(RSD,PSD)was added into the two soils to make four treatment soils.The control soils were prepared by adding Ca(OH)2 to the same pH as the RSD and PSD treatments(RCK,PCK).All the eight soil samples were then cultured at dark for 30 days before used as the treatments of corn pot experiment.After corn harvest,soil acidity,cation exchange capacity,organic matter,available nutrient content,microbial diversity,plant aboveground and root growth and nutrient uptake were analyzed.【Results】Compared to before sowing,the lateritic red soil pH after harvest of maize in RSD,RCK,PSD,and PCK treatment decreased by 0.11,0.60,0.92,and 1.04 unit,the decrease in RCK,PSD,and PCK reached significant level.While the latosol soil pH after harvest in RSD increased by 0.22 unit,and that in RCK,PSD,and PCK decreased by 0.13,0.16,and 0.36 unit,with significant decrease in PSD and PCK treatment.In lateritic red soil,there were no significant differences among the four treatments in exchangeable H+and Al3+content,while in latosol soil,the exchangeable Al3+in RSD treatment was higher than in RCK,but that in PSD lower than PCK.The soil cation exchangeable capacity(CEC)in the RSD and PSD treatments were significantly higher than that in the corresponding lime treatment.The RSD and PSD increased the soil CEC by 27.11%and 17.69%in lateritic red soil,and increased soil CEC by 10.10%and 6.40%in latosol soil,respectively.Both RSD and PSD increased the content of soil organic matter,available N,P and K significantly,compared with lime controls.The application of straw decayed products enhanced th
作者
许映慧
杜建军
范如芹
杨贤霆
何文彬
周良卓
潘晓莹
XU Ying-hui;DU Jian-jun;FAN Ru-qin;YANG Xian-ting;HE Wen-bin;ZHOU Liang-zhuo;PAN Xiao-ying(College of Resources and Environment,Zhongkai University of Agriculture and Engineering,Guangzhou,Guangdong 510225,China;Engineering and Technology Research Center for Agricultural Land Pollution Integrated Prevention and Control of Guangdong Higher Education Institutes,Guangzhou,Guangdong 510225,China)
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2023年第5期826-839,共14页
Journal of Plant Nutrition and Fertilizers
基金
广州市科技计划项目(202201011329)
国家自然科学基金项目(42177299)
仲恺农业工程学院博士启动金项目(KA22016B763)。
关键词
红壤复酸化
秸秆腐解产物
抗酸化
微生物多样性
玉米生长
red soil re-acidification
straw decayed products
acidification resistance
microbial diversity
maize growth
