9月上旬,我國北方棉區出現了往年少有的秋雨連綿天氣,使即將成熟的棉桃不能開放。9月10日(ri),筆(bi)者(zhe)在(zai)我(wo)省(sheng)南(nan)部(bu)看(kan)了(le)幾(ji)塊(kuai)棉(mian)田(tian),發(fa)現(xian)每(mei)株(zhu)棉(mian)花(hua)均(jun)有(you)爛(lan)桃(tao),少(shao)則(ze)一(yi)兩(liang)個(ge),多(duo)則(ze)三(san)四(si)個(ge)甚(shen)至(zhi)更(geng)多(duo)。由(you)於(yu)棉(mian)花(hua)采(cai)摘(zhai)初(chu)期(qi)植(zhi)株(zhu)茂(mao)盛(sheng),即(ji)使(shi)雨(yu)天(tian)過(guo)後(hou),棉(mian)株(zhu)底(di)部(bu)通(tong)風(feng)透(tou)光(guang)極(ji)差(cha),在(zai)潮(chao)濕(shi)低(di)溫(wen)環(huan)境(jing)下(xia)仍(reng)會(hui)出(chu)現(xian)爛(lan)桃(tao),為(wei)此(ci),建(jian)議(yi)廣(guang)大(da)棉(mian)農(nong)采(cai)取(qu)以(yi)下(xia)措(cuo)施(shi)盡(jin)量(liang)減(jian)少(shao)損(sun)失(shi)。
去枝葉、開“天窗”duiyumaoshengdemiantian,yingjishizhaichuzhujingshangbudeyepian,jianqukongguozhi,bingchuququanbuyeyajiwuxiaohualei。zheyangbujinshizhenggemiantiantongfengtouguang,haikeyizhiyingyangshengchangjianshaoyangfenxiaohao,cushimianhuazhonghouqijinkuaichengshu。
推棉株、晾壟行采棉初期,一般棉田具有小壟密集枝葉重疊、大壟較寬行人頻繁,其間多有較大空隙,這一時期可進行推棉株、晾壟行。具體操作如下:在晴天無露水時,人站在棉花窄行中,用手扶住棉株頂端,用腳輕踩棉株根部,使相鄰兩行棉株相向傾斜呈“八”字形,讓外側枝葉占據寬行空隙。這樣原密集區域即可充分得到陽光照曬,曬上5~7天後,再反推過來,使棉株另一邊也能得到日曬。通過交替推株晾行,可以有效降低整個田間濕度,減少病菌滋生、繁殖,促使棉桃盡快開放。
搶摘“僵瓣棉”多(duo)賣(mai)錢(qian)棉(mian)花(hua)出(chu)現(xian)爛(lan)桃(tao)和(he)僵(jiang)瓣(ban)以(yi)後(hou),要(yao)及(ji)時(shi)搶(qiang)摘(zhai),回(hui)家(jia)後(hou)趁(chen)雨(yu)天(tian)或(huo)晚(wan)間(jian)剝(bo)開(kai),並(bing)注(zhu)意(yi)在(zai)家(jia)中(zhong)搞(gao)好(hao)晾(liang)曬(shai)。廣(guang)大(da)棉(mian)農(nong)要(yao)注(zhu)意(yi)收(shou)聽(ting)天(tian)氣(qi)預(yu)報(bao),在(zai)連(lian)陰(yin)雨(yu)前(qian),抓(zhua)緊(jin)搶(qiang)收(shou)黃(huang)桃(tao)及(ji)開(kai)口(kou)桃(tao),帶(dai)回(hui)攤(tan)晾(liang)在(zai)通(tong)風(feng)處(chu),促(cu)使(shi)爛(lan)桃(tao)後(hou)熟(shu)。遇(yu)晴(qing)天(tian)可(ke)進(jin)行(xing)曝(pu)曬(shai),然(ran)後(hou)用(yong)軟(ruan)木(mu)條(tiao)敲(qiao)打(da)蓬(peng)鬆(song),而(er)後(hou)出(chu)售(shou)可(ke)提(ti)升(sheng)價(jia)錢(qian)減(jian)少(shao)損(sun)失(shi)。
生長後期噴乙烯利催熟用藥量與用法請參照說明書和天氣靈活掌握。一定要買知名廠家產品,保證品質。
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