主幹塗白:zaochunjinxingzhugantubai,keshishutiwendushengjianghuanman,jianqingrishaohedonghai,yanchiguoshumengyahekaihua,congeryouxiaobimianzaochunshuanghai,tongshihaikejianzhishuganbingchonghai。
熏煙防霜凍:根(gen)據(ju)曆(li)年(nian)來(lai)果(guo)樹(shu)受(shou)霜(shuang)凍(dong)的(de)經(jing)驗(yan),在(zai)果(guo)樹(shu)萌(meng)動(dong)後(hou)要(yao)注(zhu)意(yi)天(tian)氣(qi)預(yu)報(bao)情(qing)況(kuang),特(te)別(bie)是(shi)夜(ye)間(jian),當(dang)氣(qi)溫(wen)降(jiang)至(zhi)果(guo)樹(shu)受(shou)凍(dong)臨(lin)界(jie)溫(wen)度(du)時(shi)開(kai)始(shi)薰(xun)煙(yan),直(zhi)至(zhi)氣(qi)溫(wen)回(hui)升(sheng)到(dao)受(shou)凍(dong)臨(lin)界(jie)溫(wen)度(du)以(yi)上(shang)時(shi)熄(xi)火(huo)。一(yi)般(ban)用(yong)煙(yan)霧(wu)較(jiao)大(da)、略潮濕一點的柴草為原料,如麥秸、殘枝落葉、鋸末等,或用防霜煙霧劑進行熏煙。為提高防霜凍的效果,可按上風向多放柴草、下風向少放柴草的原則,一般每畝果園堆4堆~5堆,每堆用料25公斤左右。
霜前灌水:低溫來臨前3天~5天(tian)及(ji)時(shi)灌(guan)水(shui),防(fang)效(xiao)最(zui)好(hao)。霜(shuang)前(qian)灌(guan)水(shui),晚(wan)上(shang)水(shui)溫(wen)比(bi)土(tu)溫(wen)高(gao),水(shui)可(ke)使(shi)土(tu)壤(rang)增(zeng)加(jia)大(da)量(liang)的(de)熱(re)量(liang),同(tong)時(shi)灌(guan)水(shui)後(hou)可(ke)使(shi)土(tu)壤(rang)導(dao)熱(re)率(lv)增(zeng)大(da),有(you)利(li)於(yu)土(tu)壤(rang)深(shen)層(ceng)的(de)熱(re)量(liang)向(xiang)上(shang)傳(chuan)遞(di),灌(guan)水(shui)後(hou)先(xian)不(bu)要(yao)劃(hua)鋤(chu)。
噴藥劑防霜:凍(dong)在(zai)果(guo)樹(shu)萌(meng)動(dong)後(hou)至(zhi)開(kai)花(hua)前(qian),噴(pen)施(shi)能(neng)夠(gou)提(ti)高(gao)果(guo)樹(shu)抗(kang)逆(ni)性(xing)的(de)藥(yao)劑(ji),同(tong)時(shi)配(pei)合(he)葉(ye)麵(mian)噴(pen)肥(fei),可(ke)有(you)效(xiao)地(di)預(yu)防(fang)霜(shuang)害(hai)的(de)發(fa)生(sheng)。從(cong)試(shi)驗(yan)調(tiao)查(zha)情(qing)況(kuang)來(lai)看(kan),花(hua)前(qian)噴(pen)保(bao)利(li)豐(feng)、保得、植病靈83增抗劑、PBD等,均能取得較好的效果。
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