控释尿素基施深度对夏玉米产量和氮素利用的影响
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Effects of Base Application Depths of Controlled Release Urea on Yield and Nitrogen Utilization of Summer Maize
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中国农业科学 . 2020, (21): 4342 -4354 .  DOI: 10.3864/j.issn.0578-1752.2020.21.004