怎(zen)樣施(shi)肥(fei)可保(bao)蓮(lian)藕高產

蓮(lian)藕生(sheng)長(chang)發育分(fen)(fen)3個時期(qi)，即萌(meng)芽期(qi)、旺長(chang)期(qi)和結(jie)藕期(qi)，萌(meng)芽期(qi)從植株萌(meng)芽到立葉(xie)(xie)(xie)出(chu)現。立葉(xie)(xie)(xie)后藕長(chang)出(chu)新根，主要靠藕貯(zhu)藏的養分(fen)(fen);旺長(chang)期(qi)從植株立葉(xie)(xie)(xie)到開始結(jie)藕，養分(fen)(fen)需求量(liang)大(da)，是追肥(fei)(fei)的關(guan)鍵期(qi);結(jie)藕期(qi)從結(jie)藕到采收(shou)，藕和蓮(lian)子同步發育，養分(fen)(fen)吸收(shou)減少，莖(jing)稈和葉(xie)(xie)(xie)片(pian)養分(fen)(fen)大(da)多向(xiang)藕和蓮(lian)子轉移。因(yin)此，總共要施(shi)(shi)3次肥(fei)(fei)。栽(zai)藕前將基肥(fei)(fei)翻入田(tian)中(zhong)，一般畝(mu)施(shi)(shi)腐熟優質農(nong)家肥(fei)(fei)2000~3000公(gong)(gong)斤，通用復(fu)(fu)合肥(fei)(fei)40~50公(gong)(gong)斤。追肥(fei)(fei)有(you)2次。第(di)一次是立葉(xie)(xie)(xie)肥(fei)(fei)，在(zai)田(tian)間出(chu)現3~5片(pian)立葉(xie)(xie)(xie)時，畝(mu)施(shi)(shi)氮磷型(xing)復(fu)(fu)混肥(fei)(fei)25~30公(gong)(gong)斤;第(di)2次是滿田(tian)立葉(xie)(xie)(xie)時，畝(mu)施(shi)(shi)氮鉀型(xing)復(fu)(fu)混肥(fei)(fei)30~35公(gong)(gong)斤。

另外，淺(qian)水(shui)(shui)藕田(tian)和深(shen)水(shui)(shui)藕田(tian)施(shi)(shi)肥不(bu)相同(tong)，淺(qian)水(shui)(shui)田(tian)既(ji)可施(shi)(shi)復混肥，又(you)可施(shi)(shi)單質化(hua)肥。施(shi)(shi)前(qian)排水(shui)(shui)，淺(qian)水(shui)(shui)施(shi)(shi)肥，施(shi)(shi)后兩天再恢(hui)復水(shui)(shui)層(ceng)。深(shen)水(shui)(shui)田(tian)則(ze)把復混肥與泥土混合施(shi)(shi)用為好，這樣可以(yi)防止肥料漂浮。