近期，在不少棉田里出現了棉棵急性萎蔫現象，棉農為之束手無策，紛紛來電詢問出現這種現象的原因及解決辦法。 究其原因棉花出現急(ji)性萎(wei)蔫與(yu)天(tian)氣降(jiang)(jiang)雨(yu)頻繁有(you)關。我縣(xian)7月中(zhong)旬(xun)平(ping)均降(jiang)(jiang)水(shui)(shui)(shui)量較(jiao)常(chang)年明(ming)顯偏(pian)多(duo)，直到下旬(xun)仍是(shi)較(jiao)多(duo)的(de)雷陣雨(yu)天(tian)氣頻繁光(guang)臨(lin)，但有(you)光(guang)照時(shi)氣溫仍是(shi)較(jiao)高，人們就(jiu)(jiu)發(fa)現降(jiang)(jiang)雨(yu)的(de)時(shi)侯棉(mian)(mian)(mian)(mian)棵表現正(zheng)常(chang)，太(tai)陽出來就(jiu)(jiu)有(you)棉(mian)(mian)(mian)(mian)花(hua)萎(wei)蔫。說明(ming)頻繁的(de)降(jiang)(jiang)雨(yu)已經使棉(mian)(mian)(mian)(mian)田(tian)土(tu)壤(rang)(rang)板結嚴重，土(tu)壤(rang)(rang)水(shui)(shui)(shui)分(fen)多(duo)日處在(zai)(zai)飽和(he)狀態，土(tu)壤(rang)(rang)通透(tou)性能(neng)(neng)差，棉(mian)(mian)(mian)(mian)花(hua)根系(xi)的(de)生(sheng)(sheng)(sheng)理(li)生(sheng)(sheng)(sheng)化活性減(jian)弱，這(zhe)種環(huan)境持續時(shi)間越長，棉(mian)(mian)(mian)(mian)花(hua)受害就(jiu)(jiu)越加(jia)嚴重。當天(tian)氣轉晴時(shi)，棉(mian)(mian)(mian)(mian)花(hua)對(dui)氣象條件的(de)突變難以適應，加(jia)之棉(mian)(mian)(mian)(mian)花(hua)枝多(duo)葉片多(duo)蒸騰量大，而出現了水(shui)(shui)(shui)分(fen)供不(bu)(bu)應求的(de)矛盾，這(zhe)就(jiu)(jiu)是(shi)造成(cheng)棉(mian)(mian)(mian)(mian)花(hua)萎(wei)蔫的(de)主要原因。一般(ban)而言，地(di)(di)勢低洼的(de)地(di)(di)段(duan)和(he)粘重土(tu)壤(rang)(rang)相對(dui)顯重些，但大部分(fen)棉(mian)(mian)(mian)(mian)株仍會恢(hui)復正(zheng)常(chang)。 為減(jian)少生(sheng)(sheng)(sheng)產損失，建議棉(mian)(mian)(mian)(mian)農(nong)朋(peng)友重點抓(zhua)好如(ru)下四個方面： ⑴及時(shi)排水(shui)(shui)(shui)。力爭(zheng)棉(mian)(mian)(mian)(mian)田(tian)不(bu)(bu)積水(shui)(shui)(shui)，遇有(you)積水(shui)(shui)(shui)要在(zai)(zai)24小(xiao)時(shi)之內排完。 ⑵有(you)條件的(de)植棉(mian)(mian)(mian)(mian)戶(hu)可(ke)根據地(di)(di)勢挖滲水(shui)(shui)(shui)溝，降(jiang)(jiang)低地(di)(di)下水(shui)(shui)(shui)位，減(jian)少棉(mian)(mian)(mian)(mian)田(tian)濕度(du)。 ⑶在(zai)(zai)棉(mian)(mian)(mian)(mian)花(hua)行(xing)間淺劃鋤，深度(du)2—3公分(fen)，破除(chu)板結、改(gai)善根系(xi)生(sheng)(sheng)(sheng)長環(huan)境。 ⑷噴灑(sa)802（主要成(cheng)分(fen)是(shi)復硝粉(fen)鉀）或豐收素（主要成(cheng)分(fen)是(shi)復硝粉(fen)鈉(na)）等植物(wu)生(sheng)(sheng)(sheng)長促(cu)(cu)進(jin)劑，它(ta)能(neng)(neng)迅(xun)速滲透(tou)于(yu)棉(mian)(mian)(mian)(mian)株體內，促(cu)(cu)進(jin)細胞(bao)質流動，增(zeng)強葉肉細胞(bao)活力，增(zeng)強棉(mian)(mian)(mian)(mian)花(hua)抗性，使不(bu)(bu)萎(wei)蔫株能(neng)(neng)正(zheng)常(chang)生(sheng)(sheng)(sheng)長、減(jian)少脫落，多(duo)結鈴，對(dui)已有(you)萎(wei)蔫狀的(de)棉(mian)(mian)(mian)(mian)棵能(neng)(neng)盡(jin)早恢(hui)復正(zheng)常(chang)。