压力水头和施氮量对微润灌土壤水氮运移的影响
压力水头和施氮量对微润灌土壤水氮运移的影响
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GUO Hanxiao , SHEN Lixia , Yao, FAN , NIU Shuang , YANG, Mei , SUN Xuelan and LIU Ronghao
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Xinxiang City: Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage
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Xinxiang City: Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage
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【目的】探究微润灌溉水肥一体化条件下土壤水氮分布特征。【方法】通过室内土箱模拟试验，设置了2个压力水头（1 m和1.5 m）和3个氮肥（尿素）水平（0、500和1 000 mg/L），共6个处理，每个处理重复3次。定时记录累积入渗量和湿润锋运移距离，132 h后测定了湿润体不同位置土壤含水率、铵态氮量、硝态氮量，研究了不同压力水头和施氮量对土壤水氮分布的影响。【结果】尿素肥液对微润管出流速率具有明显影响，累积入渗量与时间呈显著的线性相关，压力水头1.5 m、施氮水平0 mg/L处理累积入渗量最大，达到10.55 L，湿润锋运移距离也最远。与1 m压力水头处理组相比，1.5 m压力水头处理组土壤含水率、铵态氮量、硝态氮量均增大；入渗132 h，与500 mg/L氮肥入渗处理相比，1 m压力水头...
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压力水头和施氮量对微润灌土壤水氮运移的影响
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TN_cdi_wanfang_journals_ggps202011008
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https://devfeature-collection.sl.nsw.gov.au/record/TN_cdi_wanfang_journals_ggps202011008
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1672-3317
DOI
10.13522/j.cnki.ggps.2020089
