zaidongchunbaohudizaipeitiaojianxia,youyupengshineitongfengjiaocha,kunchongjiaoshao,buliyuchuanfenshoufen,rongyizaochengxihongshishoufenbuliang,zaoqiwendujiaodishibuliyuzuoguo,zhexiedourongyiyinqixihongshizuoguolvxiajianghuoguoshishengchangfayubuliang,xingchengjixingguo,chanlianghepinzhishoudaoyingxiang。所以,保護地栽培的西紅柿需要進行人工授粉,以提高產量和品質。其具體操作技巧如下:
在開花初期使 用2,4—D、防落素等來提高授粉和坐果率。2,4—D隻能用於塗花或浸花,使用濃度為10~20毫克/公斤,不能噴霧,不能讓藥液沾到葉片上,否則易引起葉片畸形。番茄靈在每朵花序上有3~4朵花開放時噴灑,濃度為20~50毫克/公斤,每朵花處理一次。在開花中期,使用防落素噴灑效果好,使用濃度為25~40毫克/公斤。若在藥液中添加適量的微量元素如硼、鋅、銅(tong)等(deng),對(dui)提(ti)高(gao)坐(zuo)果(guo)率(lv)和(he)促(cu)進(jin)果(guo)實(shi)膨(peng)大(da)效(xiao)果(guo)便(bian)佳(jia)。使(shi)用(yong)濃(nong)度(du)隨(sui)氣(qi)溫(wen)變(bian)化(hua)而(er)不(bu)同(tong),嚴(yan)冬(dong)季(ji)節(jie)使(shi)用(yong)濃(nong)度(du)可(ke)酌(zhuo)情(qing)加(jia)大(da),但(dan)不(bu)宜(yi)過(guo)高(gao),以(yi)防(fang)出(chu)現(xian)畸(ji)形(xing)果(guo)。
采用人工振蕩授粉法也能提高西紅柿坐果率、chanlianghepinzhi。jiushizaixihongshihuaxukaihuashengqi,zhendanghuaxujinxingrengongfuzhushoufen,danyaoqiuxixincaozuo,yifangzhizhuhehuaxushoushang。cifayushiyongfangluosuxiangbi,kexianzhutigaoxihongshidezuoguolvhezongchanliang。
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