摘要
通过研究不同氮水平下生物炭与菌肥对采煤塌陷复垦土壤养分及氮素利用率的影响,为复垦土壤熟化提高依据。结果表明,随着施氮量的增加,生物炭处理和生物炭+菌肥处理均有效提高了复垦土壤有机质、全氮、全磷、碱解氮、速效磷含量;在施氮量210 kg/hm2时,土壤碱解氮、速效磷含量生物炭+菌肥与生物炭处理间差异显著;氮肥农学效率和氮肥利用率随施氮量增加呈递减趋势,生物炭+菌肥的氮肥农学效率和氮肥利用率高于生物炭处理。
Field experiment was carried out to investigate soil nutrient content of coal mining subsidence reclaimed, maize yield andnitrogen use efficiency under different nitrogen levels, which provided basis for the reclamation of reclaimed soil. The results showed thatwith the increase of nitrogen application, the contents of organic matter, total nitrogen, total phosphorus, alkaline nitrogen and availablephosphorus in reclaimed soil were effectively increased by biochar treatment and biochar＋ bacterial fertilizer treatment. The contents ofalkaline nitrogen and available phosphorus had significantly different between biochar treatment and biochar＋ bacterial fertilizer, whenthe nitrogen application was 210 kg/hm2. With the increase of fertilization amount, the agronomic efficiency and nitrogen use efficiency ofnitrogen reduced. The agronomic efficiency and nitrogen use efficiency of nitrogen of biochar＋ microbial fertilizer treatment were higherthan that of biochar treatment.
作者
许剑敏
梁利宝
XU Jianmin;LIANG Libao(College of Resources and Environment,Shanxi Agricultural University,Taigu 030801,China)
出处
《山西农业科学》
2018年第11期1863-1866,共4页
Journal of Shanxi Agricultural Sciences
基金
山西省土壤环境与养分资源重点实验室开放课题项目(2016004)
山西农业大学青年科技创新基金项目(201501)
关键词
不同氮水平
生物炭
菌肥
氮素利用率
different nitrogen levels
biochar
microbial fertilizer
nitrogen use efficiency
作者简介
许剑敏（1980-）,男,山西榆次人,讲师,硕士,主要从事土壤退化与生态重建研究工作.
