注意一:xuangoudaizimotantubianyi。yibanmodaiheliezhizhidaisuiranbianyi,danxiangdangyibufenshuyuwuzhengchangjiashengchan,chanpinguigebuguifan,zhiliangbuguoguan,zhishitaodaipingguodezhiliangnanyitisheng。膜袋蘋果一般增值40%左右,而紙袋蘋果一般增值1-2倍。因此,建議廣大果農在經濟條件許可的前提下,以選購優質紙袋為好。如果經濟條件不允許,可選購優質膜袋。
注意二:套tao袋dai前qian鈣gai要yao補bu足zu。套tao袋dai蘋ping果guo特te別bie是shi套tao紙zhi袋dai的de蘋ping果guo,由you於yu長chang期qi處chu在zai一yi個ge黑hei暗an潮chao濕shi的de微wei環huan境jing中zhong,蒸zheng騰teng能neng力li大da為wei減jian弱ruo,吸xi收shou鈣gai的de能neng力li很hen差cha。如ru果guo套tao袋dai前qian沒mei有you補bu鈣gai,就jiu容rong易yi因yin缺que鈣gai引yin起qi一yi些xie生sheng理li性xing病bing害hai,如ru苦ku痘dou病bing、痘斑病和水心病等。而在果區,一些果農不重視補鈣,有的隻補一次鈣,就急急忙忙去套袋;所以生產的套袋果紅點病太多。一般來說,套袋之前應噴施2-3次高質量的鈣肥。
注意三:套袋前殺菌滅蟲要徹底。一些套袋蘋果果麵黑點很多,植保專家研究表明,主要是粉紅單端孢菌、輪lun斑ban病bing菌jun和he康kang氏shi粉fen蚧jie等deng危wei害hai造zao成cheng的de。有you不bu少shao果guo農nong對dui此ci認ren識shi不bu足zu,防fang治zhi不bu到dao位wei,套tao袋dai之zhi前qian隻zhi噴pen一yi次ci藥yao,且qie沒mei有you選xuan用yong優you質zhi農nong藥yao,造zao成cheng黑hei點dian病bing很hen嚴yan重zhong。一yi般ban要yao求qiu套tao袋dai前qian必bi須xu噴pen2-3次優質農藥,每次間隔7-10天,可與補鈣一並進行。
注意四:套tao袋dai時shi間jian不bu宜yi偏pian早zao。蘋ping果guo幼you果guo期qi正zheng是shi細xi胞bao分fen裂lie盛sheng期qi,要yao求qiu有you充chong足zu的de光guang照zhao。如ru果guo套tao袋dai過guo早zao,在zai陰yin暗an環huan境jing下xia不bu利li於yu幼you果guo細xi胞bao分fen裂lie膨peng大da。一yi些xie果guo農nong多duo在zai謝xie花hua後hou20-30天就將果袋套完,時間偏早,因而蘋果個兒小。根據多年實踐經驗,套紙袋適宜的時期為謝花後35-40天。但套袋時間也不宜過晚,過晚套下的蘋果果麵粗糙。
注意五:要提防大風襲擊。風災對套袋蘋果影響很大,建議山區果農在套袋時注意兩點:一是低窪避風的果園應多套紙袋,多風的山嶺果園應多套膜袋;二是每株果樹迎風麵和樹冠上部應多套膜袋,而樹冠背風麵和樹冠下部及內膛應多套紙袋。
注意六:套(tao)袋(dai)後(hou)莫(mo)放(fang)鬆(song)病(bing)蟲(chong)防(fang)治(zhi)。不(bu)少(shao)果(guo)農(nong)誤(wu)認(ren)為(wei)蘋(ping)果(guo)套(tao)袋(dai)後(hou)病(bing)蟲(chong)就(jiu)不(bu)容(rong)易(yi)危(wei)害(hai)果(guo)實(shi)了(le),從(cong)而(er)放(fang)鬆(song)了(le)對(dui)病(bing)蟲(chong)的(de)防(fang)治(zhi)。有(you)的(de)套(tao)袋(dai)後(hou)隻(zhi)噴(pen)了(le)一(yi)次(ci)農(nong)藥(yao),有(you)的(de)一(yi)次(ci)也(ye)不(bu)噴(pen),結(jie)果(guo)造(zao)成(cheng)早(zao)期(qi)落(luo)葉(ye)病(bing)和(he)葉(ye)蟎(man)等(deng)病(bing)蟲(chong)害(hai)大(da)發(fa)生(sheng),很(hen)多(duo)富(fu)士(shi)樹(shu)在(zai)八(ba)月(yue)中(zhong)下(xia)旬(xun)落(luo)葉(ye)率(lv)就(jiu)達(da)40%yishang,bingchongcongdaiziqikongjinrudaineiweihaiguoshiyebushao。shishishang,pingguotaodaihoubaoyebaoguorenghenzhongyao,qianwanbukefangsongduibingchongdefangzhi,yingdangyizhuadaodi。
注意七:jiechuzhidaibuyiguozao。youdeguonongweilecushipingguozaozhesezaoshangshi,guozaojiechuzhidai。jubizhetiaozha,fanshizaozhongshupingguozhidaijiechuguozaode,youyudangshizhengshigaowenjijie,suiranzhesezao,dangaowenzaochengderizhuobinghenyanzhong。erwanshupingguozhidaijiechuguozaobingzaishushangzheseshijianguochangde,zheseduoweianhongse,guangzedubuhao。youcikanlaibuguanzaozhongshupingguohaishiwanshupingguo,jiechuzhidaiguozaodouhuizhijieyingxiangpingguowaiguanhexiaoyi。yibanlaishuo,zaozhongshupingguoweilezaozhesezaoshangshi,kehekeshangxianlianxihaozaiquedingjiechuzhidaishijian,wanshupingguoyibanyingzaicaishouqian25天左右解除紙袋。相反,解除紙袋時間也不能過晚,過晚了則蘋果著色不佳。
注意八:適期銷售。
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