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STUDYONTHEEFFECTOFPOTASSIUMCHLORIDEOFQINGHAIChenShoulun;MaChangbao;XingWenyingLiRong;GaoXiangzhao;YangFan;DuSen（NationalAgro－TechnicalExtensionandServiceCentre，Beijing100026）钾是作物生长发育所必须的三大营养元素之一，随着我国高需钾品种（如杂交水稻、玉?
(NationalAgro-TechnicalExtensionsandServiceCentre, Beijing100026) Potassium is one of the three essential nutrients required for crop growth and development. With the development of high potassium demand in China (such as hybrid rice, jade?),