近年來,全水溶性肥料(簡稱水溶肥)zuoweiyizhongxinxingfeiliao,beiyuelaiyueduodenonghusuorenshihejieshou,bingpubianshiyongzailedapengshucaishang。raner,jizhezaixiaxiangcaifangzhongquefaxian,bushaononghushiyongshuirongfeidefangfabuduitou,jieguohuaqianmailefeiliao,quemeiyongdaohaochu。
水溶肥總營養含量都在50%yishang,qiehanyouduozhongzhongweiliangyuansu,yuyibanfuhefeixiangbijiao,yingyangquanmian,quanrongyushui,xishouliyonglvgao。jieheshuirongfeidezhexietedian,guangdanonghuzaishiyongshang,yinggaizhangwoyidingjiqiao。
首先,不要按照衝施複合肥的做法直接衝施,而要采取“二次稀釋”衝肥法。記者采訪發現,有的農戶直接按照衝施一般複合肥的做法衝施水溶肥,結果造成了衝肥不均勻,衝肥量多的蔬菜出現傷根、黃葉情況,衝肥量少的蔬菜則長勢受影響。水溶肥比一般複合肥養分含量高,用量少,一般畝用8—10gongjinjike。jianyinonghukeshixianzhizuoyigechongshitong,tongdichushegekaiguan,chongfeiqian,xianjiangshuirongfeironghuazaichongshitongnei,jisuanhaoshifeiliang,dakaikaiguan,rangfeiliaorongyeshunzhejiaoshuijinxingchongfei。ciwai,nonghukeyizhijieyongdiandongpenwuqizuoweixishifeiliaorongyederongqi,jinxingchongfei。ercixishichongfeidemudeshibaozhengchongfeijunyun,tigaofeiliaoliyonglv。
其次,穴施水溶肥要注意施用量。穴施肥料具有用肥集中、利用率高、用肥少等特點,記者采訪中發現,不少農戶對穴施水溶肥的用量把握不準,結果出現了燒根、燒苗的情況。因此,穴施水溶肥一定要注意施用量,比如芳潤(20:20:20)水溶肥,以穴施3—5克為宜,而且要與土攪拌均勻後再栽苗。
最(zui)後(hou),水(shui)溶(rong)肥(fei)噴(pen)施(shi)時(shi),盡(jin)量(liang)單(dan)用(yong),或(huo)者(zhe)與(yu)非(fei)堿(jian)性(xing)的(de)農(nong)藥(yao)混(hun)用(yong)。在(zai)蔬(shu)菜(cai)作(zuo)物(wu)出(chu)現(xian)缺(que)素(su)症(zheng)或(huo)根(gen)係(xi)生(sheng)長(chang)不(bu)良(liang)時(shi),不(bu)少(shao)農(nong)戶(hu)多(duo)選(xuan)用(yong)水(shui)溶(rong)肥(fei)來(lai)噴(pen)施(shi)加(jia)以(yi)緩(huan)解(jie)。記(ji)者(zhe)建(jian)議(yi)農(nong)戶(hu)盡(jin)量(liang)單(dan)獨(du)噴(pen)施(shi)水(shui)溶(rong)肥(fei),或(huo)者(zhe)與(yu)非(fei)堿(jian)性(xing)的(de)農(nong)藥(yao)混(hun)用(yong),以(yi)免(mian)金(jin)屬(shu)離(li)子(zi)起(qi)反(fan)應(ying)產(chan)生(sheng)沉(chen)澱(dian),造(zao)成(cheng)葉(ye)片(pian)肥(fei)害(hai)或(huo)藥(yao)害(hai)。
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