摘要
选择了我国20个不同区域代表性的旱地农田土壤,以拟南芥作为指示作物,在无菌的土壤浸提液琼脂固化基质上进行培养以量化其化学肥力,采用无菌营养土外源接种不同土壤微生物菌群来测定其生物肥力。结果表明:不同地区的土壤生物肥力和化学肥力存在显著差异。回归分析显示,生物肥力随着年均温的增加而增加,随着纬度和土壤pH值的增加而降低;生物肥力、化学肥力与土壤总有机碳、矿物结合态碳的关系密切,与土壤全氮及颗粒有机碳的关系较弱。生物肥力随着微生物量碳氮的增加而降低,这暗示土壤微生物量在生物肥力预测中存在不确定性。在全国范围内,土壤生物肥力受立地条件和土壤碳氮组分的影响显著。
Twenty representative dryland farmland soils from different regions of China were selected in this study.Arabidopsis thaliana was used as the indicator crop,and cultivated on the agar-solidified substrate of sterile soil extract to quantify its chemical fertility of soils,and its biological fertility was determined by inoculation of soil microbial community.The results showed that There were significant differences in soil biological fertility and chemical fertility in different regions.Regression analysis showed that biological fertility increased with the increase of annual average temperature,but decreased with the increase of latitude and soil pH value.Biological and chemical fertility were closely related to soil total organic carbon and mineral-associated soil carbon,but weakly related to soil total nitrogen and particulate organic carbon.The decrease in biological fertility with the increase of microbial biomass carbon and nitrogen suggested that the uncertainty of soil microbial biomass in predicting biological fertility.Soil biological fertility is significantly affected by site conditions and soil carbon and nitrogen components throughout the country.
作者
卢巧改
苏晓曼
牛银星
司亚坤
李培培
韩燕来
田春丽
李芳
LU Qiao-gai;SU Xiao-man;NIU Yin-xing;SI Ya-kun;LI Pei-pei;HAN Yan-lai;TIAN Chun-li;LI Fang(College of Resources and Environment,Henan Agricultural University,Zhengzhou 450046,China;Henan Vocational College of Agriculture,Zhongmu 451450,China)
出处
《江西农业学报》
CAS
2024年第11期45-53,76,共10页
Acta Agriculturae Jiangxi
基金
河南省自然科学基金优秀青年项目(242300421147)
国家自然科学基金面上项目(42377334)
国家重点研发计划(2022YFD1500203)
河南农业职业学院科研创新团队项目(HNACKT-2020-06)。
关键词
拟南芥
化学肥力
生物肥力
土壤
微生物
Arabidopsis thaliana
Chemical fertility
Biological fertility
Soil
Microorganism
