PAN Feifei,ZHANG Weihao,SUN Zhuang,et al.Effects of Exogenous Nitrogen Addition on Soil Mineral Nitrogen Content in Protected Vegetable Fields of Different Years[J].Northern Horticulture,2022,(03):79-86.[doi:10.11937/bfyy.20213207]
添加外源氮对不同年限设施土壤矿质氮含量的影响
- Title:
- Effects of Exogenous Nitrogen Addition on Soil Mineral Nitrogen Content in Protected Vegetable Fields of Different Years
- Keywords:
- exogenous nitrogen; planting years; protected vegetable fields; mineral nitrogen; nitrification rate
- 文献标志码:
- A
- 摘要:
- 以3个不同种植年限（0、13年和21年）的设施菜田土壤为研究对象，通过36 d培养试验，研究了添加不同外源氮条件下土壤铵态氮、硝态氮及矿质氮的含量，明确设施蔬菜种植年限和添加外源氮对土壤矿质氮含量的影响，以期为设施菜田减肥、高效施肥管理措施的制定提供参考依据。结果表明：在培养过程中，随设施菜田种植年限的增加，土壤铵态氮、硝态氮和矿质氮含量均表现为增加趋势，但施氮对土壤矿质氮含量的增加效果则随之减弱，种植年限为0、13年和21年的设施菜田土壤矿质氮含量在培养期间的最大增量分别为90.77、83.66 mg·kg-1和74.03 mg·kg-1，硝化速率常数随种植年限的增加而减小。而同一种植年限下，土壤铵态氮、硝态氮和矿质氮含量总体表现为随施氮量的增加而增加，且同一施氮量下，全部施用无机肥处理大于有机无机配施处理，硝化速率常数表现出相同的趋势。该研究可通过施氮量和肥料种类的变化来直接调控土壤矿质氮含量，以减少氮素损失。
- Abstract:
- Three protected vegetable fields with different planting years (0 year,13 years and 21 years) were selected for a 36 days incubation experiment,four fertilization treatments were set for each planting year to measure soil ammonium nitrogen,nitrate nitrogen and mineral nitrogen content during the incubation,in order to study the effects of planting years and exogenous nitrogen additions on soil mineral nitrogen content.The results showed that during the incubation,the contents of ammonium nitrogen,nitrate nitrogen and mineral nitrogen in soil increased with the increasing planting years of protected vegetables,while the effects of nitrogen application on the increment of soil mineral nitrogen content gradually weakened.The maximum increment of soil mineral nitrogen content in protected vegetable fields with the planting year of 0 year,13 years and 21 years were 90.77 mg·kg-1,83.66 mg·kg-1 and 74.03 mg·kg-1,respectively.The nitrification rate constant decreased with the increase of planting years.Under the same planting year,the contents of ammonium nitrogen,nitrate nitrogen and mineral nitrogen in soil increased with the increase of nitrogen application rate.Under the same nitrogen application,mineral nitrogen content in the treatment of the combined application of organic and inorganic fertilizer was slightly lower than that of all inorganic nitrogen fertilizer treatment.The nitrification rate constant of different N fertilization treatments showed the similar trend.The soil mineral nitrogen content could be directly regulated by the change of nitrogen application amount and fertilizer type,and the loss of nitrogen could be reduced.
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备注/Memo
第一作者简介：潘飞飞（1988-），女，博士，讲师，现主要从事土壤培肥与养分循环等研究工作。E-mail:panfeifei89@163.com.责任作者：唐蛟（1988-），男，博士，讲师，现主要从事土壤生态恢复等研究工作。E-mail:814333036@qq.com.基金项目：河南省重点研发与推广专项资助项目（202102110065）；河南科技学院博士科研启动费资助项目（207010618002）；河南省重大公益专项（创新示范专项）资助项目（201300111300）。收稿日期：2021-08-05