摘要
通过在鲁西北潮土区高产农田11年有机肥替代化肥定位试验,研究了有机肥部分替代化肥对小麦-玉米轮作体系中土壤养分及土壤真菌的影响。结果表明,有机肥替代50%的ONPK处理显著提高了土壤养分、酶活性和真菌数量。土壤速效磷较CK和NPK处理分别升高2.16倍和35.3%,土壤全氮含量提高42.4%和21.0%。ONPK处理的有机质含量较CK和NPK处理分别提高了55.2%和33.9%。冗余分析表明,速效磷、有机质和全氮含量是有机肥替代后真菌群落组成变化的主要调控因素。土壤真菌数量以ONPK处理最高,较CK和NPK处理分别增加了90.0%和1.11倍。土壤真菌优势群落依次为子囊菌门(Ascomycota)(49.1%~62.9%)、接合菌门(Zygomycota)(18.9%~38.5%)、担子菌门(Basidiomycota)(5.9%~8.6%)、壶菌门(Chytridiomycota)(2.1%~3.4%)。综上所述,增施有机肥可通过调节真菌种间互作关系,促进土壤养分累积,最终实现土壤可持续生产能力。
The effects of partial replacement of organic fertilizer on soil nutrients and soil fungi in wheat-maize rotation system were studied through 11-year positioning experiment in high-yield farmland in northwest Shandong Province.The results showed that the replacement of 50%ONPK treatment with organic fertilizer significantly increased soil nutrients,enzyme activities and fungi number.Compared with CK and NPK treatments,soil available P increased by 2.16 times and 35.3%,and soil total nitrogen increased by 42.4%and 21.0%,respectively.Compared with CK and NPK,the organic matter content of ONPK treatment increased by 55.2%and 33.9%,respectively.Redundancy analysis showed that the content of available phosphorus,organic matter and total nitrogen were the main regulatory factors for the change of fungal community composition after organic fertilizer replacement.The number of soil fungi in ONPK treatment was the highest,which increased by 90.0%and 1.11 times compared with CK and NPK treatment,respectively.The dominant communities of soil fungi were Ascomycota(49.1%-62.9%)and Zygomycota(18.9%-38.5%)Basidiomycota(5.9%-8.6%)and Chytridiomycota(2.1%-3.4%).In conclusion,increased application of organic fertilizer can promote soil nutrient accumulation by regulating the interspecific interaction of fungi,and ultimately achieve sustainable soil productivity.
作者
周晓琳
王薇
王玉霞
赵同凯
董艳芳
杜梦杨
刘佰霖
王富建
李洪杰
ZHOU Xiao-lin;WANG Wei;WANG Yu-xia(Dezhou Academy of Agricultural Sciences,Dezhou,Shandong 253015)
出处
《安徽农业科学》
CAS
2023年第3期159-162,共4页
Journal of Anhui Agricultural Sciences
基金
国家重点研发计划“黄淮海冬小麦化肥农药减施技术集成研究与示范”(2017YFD0201700)
国家自然科学基金“麦玉两熟体系作物秸秆钾转化特征与钾素补偿机制”(41877100)。
关键词
不同施肥处理
土壤养分
土壤真菌
Different fertilization treatments
Soil nutrients
Soil fungi
