杜少平;马忠明;薛亮;

• 1:甘肃省农业科学院蔬菜研究所
• 2:甘肃省农业科学院
• 3:甘肃省农业科学院土壤肥料与节水农业研究所

摘要(Abstract)：

【目的】促进黄土高原干旱半干旱区砂田西瓜水氮高效利用和可持续性生产,探索适宜的有机氮替代无机氮水平。【方法】2016—2017年在甘肃省皋兰县砂田西瓜主产区进行了连续2 a的大田试验,设置了6个处理:单施化学氮肥不施有机肥(OF-0%)、有机肥25%替代化学氮肥(OF-25%)、有机肥50%替代化学氮肥(OF-50%)、有机肥75%替代化学氮肥(OF-75%)、有机肥100%替代化学氮肥(OF-100%)和不施氮肥对照(CK),研究了有机氮替代无机氮对砂田西瓜生长、产量、品质及水氮利用效率的影响。【结果】在200 kg·hm-2施氮水平下,有机肥氮替代处理对砂田西瓜增产增效作用显著,与单施化肥相比,50%～100%替代处理西瓜成活率提高了26.47%～34.16%,增产63.2%～156.6%,果实可溶性糖含量提高18.1%～27.1%,氮素利用率提高了16.5%～18.5%,水分利用效率提高了93.5%～176.3%。【结论】在相等的总氮量投入下,50%～100%是该地区20 a砂田西瓜有机氮替代无机氮的适宜水平,建议在生产中推广应用。

关键词(KeyWords)： 西瓜;有机无机肥配施;砂田;产量;品质;水氮利用效率

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2018YFD0201300);; 甘肃省农业科学院中青年基金项目(2018GAAS05);; 国家西甜瓜产业技术体系项目(CARS-26-20)

作者(Author): 杜少平;马忠明;薛亮;

Email:

DOI: 10.13925/j.cnki.gsxb.20190380

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