一、施用钾肥的增产效果 1979年早造我县获得了总产超历史11.12％的大丰收,增产因素是多方面的,其中增施钾肥对增产起很大作用。早在六十年代,我们通过调查和试验,证实我县一些社队,由于土壤缺钾,水稻氮钾营养失调,出现早衰现象,成为威胁我县水稻生产的突出问题。因此,增施钾肥成为我县水稻生产的一个关键措施。同时,我们在近几年的氮钾营养比例试验中得出,水稻对钾的需要量并不比氮少,甚至还比氮多,一般中氮情况下,氮钾营养的比例在1:1—1.5才彼此协调,达到稳产高产。1979 First, the application of potassium yield increase effect As early as 1979 made my county total production super-history of 11.12% of the bumper harvest, yield factors are many, including the increase of potassium fertilizer to play a big role. As early as the 1960s, through surveys and experiments, we confirmed that some communes and communes in our county have become preeminent problems threatening the rice production in our county due to potassium deficiency in the soil and imbalance of nitrogen and potassium in rice and premature aging. Therefore, increasing potassium fertilizer has become a key measure of rice production in our county. In the meantime, we have found in the experiments of proportion of nitrogen and potassium in recent years that the demand of potassium for rice is no less than that of nitrogen, and even more than that of nitrogen. Under the condition of normal nitrogen, the proportion of nitrogen and potassium nutrition is between 1: 1 and 1: 1.5 only coordinated with each other, to achieve stable and high yield. 1979