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灌溉方法对日光温室土壤呼吸的影响

杨洋1,张玉龙1*,祁金虎2,范庆锋1,王展1#br#   

  1. (1沈阳农业大学土地与环境学院, 沈阳 110866; 2辽宁省森林经营研究所, 辽宁丹东 118000)
  • 出版日期:2016-11-10 发布日期:2016-11-10

Effects of irrigation methods on soil respiration rate in sunlight greenhouse.

YANG Yang1, ZHANG Yu-long1*, QI Jin-hu2, FAN Qing-feng1, WANG Zhan1#br#   

  1. (1College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China; 2Forest Management Research Institute of Liaoning, Dandong 118000,  China).
  • Online:2016-11-10 Published:2016-11-10

摘要: 于日光温室内用小区栽培番茄的试验方法研究了沟灌、滴灌和渗灌3种灌溉方法对土壤呼吸的影响。土壤呼吸采用静态箱碱液吸收法测定。结果表明,番茄生育期内沟灌、滴灌和渗灌3种灌溉处理土壤呼吸速率均呈先升高后降低的变化趋势,其最大值分别出现在水分处理后的第28、30和36天;3种灌溉处理的土壤呼吸速率不同,CO2累积释放量差异明显:分别为604.46、529.52和448.70 g·m-2。统计分析表明,3种灌溉处理土壤日均呼吸速率与其各自对应的5、15和25 cm深处土壤日均温度呈显著指数相关,与15 cm深度处土壤日均含水量呈显著线性相关。选择合理的灌溉方法,不仅能够为作物生长创造良好的土壤水分条件,而且也能有效地调控设施内空气的CO2浓度,对于蔬菜生产高产优质、土壤固碳减排具有重要意义。

关键词: 土壤理化性质, 植被类型, 土壤水库, 新建绿地, 压实

Abstract: A greenhouse experiment was conducted to investigate the effect of three irrigation modes (furrow irrigation, drip irrigation, and infiltrating irrigation) on soil respiration through cultivation of tomato. The cumulative amount of CO2 was determined by alkali absorption method. The results demonstrated that the soil respiration rates of the three treatments all tended to increase at first and then decrease during the growth period, peaking on 28, 30 and 36 days after the first irrigation, respectively. Soil respiration rate was different, and the cumulative CO2 amount showed significant differences among the three treatments, being 604.46, 529.52 and 448.70 g·m-2 under furrow irrigation, drip irrigation, and infiltrating irrigation, respectively. Statistical analysis indicated that daily average respiration rate had a significant exponential relationship with average daily soil temperature at 5, 15 and 25 cm depths (P<0.05) for furrow irrigation, drip irrigation, and infiltrating irrigation treatments, respectively. A significant linear relationship was found between soil daily average respiration rate and daily average soil water content at 15 cm depth. Thus, choosing a suitable irrigation method could not only create good soil moisture condition for crop growth, but also effectively regulate CO2 concentration within the greenhouse, which plays an important role in producing high quality vegetables and reducing soil carbon emission.

Key words: newly-established green belt, soil water reservoir, vegetation type, compaction, soil physico-chemical property.