1973年我们在调查早稻缺钾症的基础上,对我县水稻主要产区剡江河谷地带不同地段(基本上贯穿整个河谷)的18个生产队的晚稻进行了调查。通过对这些队的逐丘调查,和在典型田取代表性植株进行组织化学鉴定的结果表明:晚稻缺钾症在我县普遍存在,对水稻生产的影响很大。据反映,这种情况早已存在,不是什么新发现的问题,只不过是现在才认识罢了。缺钾田抽穗后一般均出现“早衰”现象,而“早衰”又是晚稻低产的主要原因之一。现在看来,晚稻“早 In 1973, based on a survey of potassium deficiency in early rice, we conducted a survey on late rice from 18 production teams in different parts of the Yongjiang River Valley, a major rice producing area in our county (basically running through the valley). The results of histochemical identification of representative plants from typical fields through the investigation of these teams and the results showed that potassium deficiency in late rice is widespread in our county and has a great impact on rice production. It has been reported that this situation has already existed and is not a newly discovered one. It is only now that we have realized it. Potassium deficiency field generally appear after heading “premature aging” phenomenon, and “premature aging” is one of the main reasons for late rice low yield. It now appears that late rice "early