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一九六五年春天,自治区土壤学会在乌鲁木齐召开了研究方法会议,在分析专业组的总结文件中,曾建议野外测速效钾可用10％氯化钠作浸提剂,沉淀时不加酒精,生成亚硝酸钴钠钾后,加水稀释至沉淀恰刚溶解,然后量取总体积及温度,当温度在12—24℃之间时,每升水中溶解的亚硝酸钴钠钾毫克数恰与温度相等,据此可求出每百克土中氧化钾的毫克数。 作者根据近半年来实际参加样板田工作的经验,认为上述建议尚有一定的缺点:费时
In the spring of 1965, the Autonomous Region Soil Society held a meeting of research methods in Urumqi. In the summary document of the analysis of professional groups, it was suggested that potassium could be extracted with 10% After the formation of sodium cobaltous nitrite, dilute with water to just dissolve the precipitate, and then take the total volume and temperature, when the temperature between 12-24 ℃, the dissolved sodium peroxynitrite potassium mg per liter of water just with the temperature Equal, according to which you can find the milligrams of potassium oxide per 100 grams of soil. Based on the actual experience of participating in the demonstration field work in the recent six months, the author believes that the above proposal still has some disadvantages: time-consuming