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portant; font-variant-east-asian: normal !important; font-stretch: normal !important; line-height: 32px !important;">一、叶面追肥的作用
portant; font-variant-east-asian: normal !important; font-stretch: normal !important; line-height: 32px !important;">1、用量少,见效快,是降本增效的重要手段之一。据有关资料显示,叶面施肥5分钟的效果是土壤施肥15天才能达到的效果,它能及时补充树体各期所需养分。
portant; font-variant-east-asian: normal !important; font-stretch: normal !important; line-height: 32px !important;">2、可提高光合作用,使根系生理机能活跃,吸收水分、养分的能力增强,促进脐橙植株整体代谢过程。
portant; font-variant-east-asian: normal !important; font-stretch: normal !important; line-height: 32px !important;">3、可以起到及时补充脐橙树体各种养分的作用。特别是对微量元素的补充,能起到较好的效果,达到平衡施肥,养分全面。
portant; font-variant-east-asian: normal !important; font-stretch: normal !important; line-height: 32px !important;">二、叶面追肥的时期
portant; font-variant-east-asian: normal !important; font-stretch: normal !important; line-height: 32px !important;">根据树势强弱、叶色浓淡、结果多少,结合病虫害防治在新梢生长期、保花保果期、果实膨大期、果实着色期、采后保叶期进行。
portant; font-variant-east-asian: normal !important; font-stretch: normal !important; line-height: 32px !important;">三、叶面肥的选用及浓度
portant; font-variant-east-asian: normal !important; font-stretch: normal !important; line-height: 32px !important;">叶面肥以有机养分为主,尽量少用无机养分,浓度宜淡不宜浓,浓度过高,易破坏叶肉组织,造成叶面肥害。而且一次好不用或少用多种叶面肥,以免造成叠加浓度过大而伤叶。这里建议大家选用富活素腐植酸水溶肥,它是通过有机物转换而来,其中富含丰富的植物所需的营养元素,并且能够改善土壤板结,酸碱化等问题,其中所含腐植酸以黄腐酸为主,对于提高作物产量和品质有极大帮助,并且能提高植物抗性,使植物生长更健康。
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portant; font-variant-east-asian: normal !important; font-stretch: normal !important; line-height: 32px !important;">四、使用方法及注意事项
portant; font-variant-east-asian: normal !important; font-stretch: normal !important; line-height: 32px !important;">1、一定要待新梢自剪后叶片转绿时进行。
portant; font-variant-east-asian: normal !important; font-stretch: normal !important; line-height: 32px !important;">2、喷肥时以喷叶背为主,叶面为辅,均匀喷肥,喷湿为止。
portant; font-variant-east-asian: normal !important; font-stretch: normal !important; line-height: 32px !important;">3、喷肥时间一般选阴天或晴天上午11点前及下午3点钟以后。
portant; font-variant-east-asian: normal !important; font-stretch: normal !important; line-height: 32px !important;">4、前后间隔时间一般为8至12天左右,每月控制在2次为宜,不超过3次。
portant; font-variant-east-asian: normal !important; font-stretch: normal !important; line-height: 32px !important;">5、叶面追肥只起补充作用,不能替代土壤施肥,大量养分还要靠土壤根系吸收为主。