The typical erect panicle rice variety Shennong 265, and semi-erect panicle rice variety Liaojing 294 were used to compare dry matter accumulation, absorption and use efficiency of potassium.

选用典型直立穗型水稻品种沈农265和半直立穗型品种辽粳294为试材，研究两品种干物质积累、钾素吸收和利用效率的差异。

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Genotypic differences of potassium (k) efficiency among 86 cotton cultivars were investigated under water culture at seeding stage, 28 typical cultivars were picked out for a series study.

营养液培养条件下对86个棉花基因型苗期进行钾效率筛选，并对其中的28个进行了系统的研究。

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For developing high efficiency and secure coagulants, Potassium ferrate prepared by hypochlorite oxidation method was used in the treatment of raw water with low temperature and low turbidity.

为了研制高效和安全的混凝剂，采用次氯酸盐氧化法制备高铁酸钾，对高铁酸钾处理低温低浊水源水进行研究。

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