王士超,陈竹君,周建斌,赖春香.水分对不同栽培年限日光温室土壤氮矿化的影响[J].干旱地区农业研究,2019,37(4):124~131
水分对不同栽培年限日光温室土壤氮矿化的影响
Effects of moisture on nitrogen mineralization in soils under solar greenhouses in different cultivation years
  
DOI:10.7606/j.issn.1000-7601.2019.04.17
中文关键词:  日光温室  土壤含水量  氮素矿化  栽培年限
英文关键词:solar greenhouse  soil moisture  soil N mineralization  cultivation years
基金项目:“十三五”国家重点研发计划课题(2017YFD0200106);陕西省农业攻关项目(2014K01-14-03)
作者单位
王士超 College of Natural Resources & Environment/Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi 712700, China 
陈竹君 College of Natural Resources & Environment/Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi 712700, China 
周建斌 College of Natural Resources & Environment/Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi 712700, China 
赖春香 College of Natural Resources & Environment/Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi 712700, China 
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中文摘要:
      采用室内短期(84 d)好气培养法评价了不同水分供应水平下(田间持水量的60%、80%及100%,分别用60FC、80FC和100FC表示)陕西杨凌地区不同栽培年限(种植前、种植第二年及种植第三年)日光温室土壤(0~20 cm及20~40 cm土层)氮素矿化特性。结果表明:随着日光温室栽培年限的延长,0~20 cm土层累积净矿化氮量显著增加,且随栽培年限的增加,20~40 cm 土层氮矿化势呈增加的趋势;土壤水分含量由60FC增加到80FC,土壤累积矿化氮量呈增加趋势,但当含水量达到100FC时,土壤累积矿化氮量降低。回归分析结果表明,土壤有机质含量每增加1 g·kg-1, 60FC、80FC、100FC土壤含水量条件下土壤氮矿化势分别增加 1.62、1.88 mg·kg-1和1.57 mg·kg-1;土壤全氮含量每增加1 g·kg-1,土壤氮矿化势分别增加28.93、33.42 mg·kg-1和27.82 mg·kg-1。因此,建议日光温室蔬菜栽培中应综合考虑温室年限及灌溉量对土壤氮素矿化过程的影响。
英文摘要:
      Aerobic laboratory incubation method (84 day) was conducted to evaluate the effects of different soil moisture (60%, 80%, and 100% of field capacity) on nitrogen (N) mineralization in 0~20 and 20~40 cm soil layers of different utilization age (0, 2 a, and 3 a) in the solar greenhouses in Yangling, Shannxi. Results showed that the net N mineralization in the 0~20 cm of soil layers increased with the cultivating history, and also increased with soil moisture in the 20~40 cm of soil layers. The net N mineralization increased steadily when the soil moisture increased from 60FC to 80FC, while decreased when the soil moisture reached 100FC. The regression analysis indicated that N mineralization potential (N0) of soils at 60, 80, and 100% of field capacity was increased by 1.62, 1.88, and 4.57 mg·kg-1 when soil organic matter was increased by 1 g·kg-1; and when total N was increased by 1 g·kg-1, the N0 of soils at 60, 80, and 100% of field capacity was increased by 28.93, 33.42, and 27.82 mg·kg-1, respectively. Therefore, the effects of irrigation rate and cultivation history on N mineralization should be considered as factors for solar greenhouse vegetable N fertilizer management.
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