氮肥是(shi)水稻生長不可(ke)或缺的營(ying)養元素之(zhi)一,對(dui)提(ti)高作物產量(liang)具有重要作用(yong),但施(shi)(shi)用(yong)過量(liang),會(hui)適得其反,以下是(shi)水稻施(shi)(shi)用(yong)過多氮肥的危害,希(xi)望農(nong)民(min)朋(peng)友正確(que)認識,科學(xue)施(shi)(shi)用(yong)。1、分蘗期(qi)施(shi)(shi)用(yong)氮肥過多,地上部…
(1)硼肥硼肥可(ke)(ke)用(yong)(yong)(yong)作(zuo)基(ji)肥、追肥和種肥。做基(ji)肥時可(ke)(ke)與氮、磷肥配合施用(yong)(yong)(yong),也可(ke)(ke)單(dan)獨施用(yong)(yong)(yong)。一(yi)般每畝施用(yong)(yong)(yong)0.25~0.5公(gong)斤硼酸(suan)或硼砂,一(yi)定(ding)要施均(jun)勻(yun),防止濃度過高而中毒。追肥通常(chang)采(cai)用(yong)(yong)(yong)根外追肥的(de)方法,噴…