施钾量对紫甘薯产量及养分利用的影响
赵风芹, 刘庆, 杜志勇, 史衍玺
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ZHAO Fengqin, LIU Qing, DU Zhiyong, SHI Yanxi
华北农学报 . 2018, (5): 226 -231 .  DOI: 10.7668/hbnxb.2018.05.031