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桃树怎么样疏果?

  桃树为什么要疏果,桃树留果标准是怎么样,桃树要疏几次果,桃树在什么时候疏果,桃树怎么样疏果?以上问题小编将一一介绍,供网友们参考。

  一、桃树为什么要疏果

  桃树花量是收获果实数目的20倍以上 ,如放任生长,坐果后容易出现果实膨大不良,生理落果严重,树势衰弱,品质低下的现象。桃树疏果的作用在于调节树势,促进果实膨大,提高果实品质,生产出附加值高,丰产、稳产、内在品质及外观质量良好的高档优质商品桃果。

  二、桃树留果标准

  桃树留果量的标准主要根据树龄、树势、品种和管理水平而定。

  1、叶果比法:桃树合理的叶量和果量的比例是早熟品种建议叶果比是20:1~30:1;中熟品种建议叶果比是25:1~35:1;晚熟品种建议叶果比是30:1~40:1。

  2、按枝定果法:桃树长果枝建议留3~4果,中果枝建议留2~3果,短果枝建议留1果,花束状结果枝不留果。早熟品种应适当多留,晚熟品种尽量少留。

  3、按主干粗度定果法:桃树主干周长20厘米的建议留果100个果,主干周长30厘米的可留240个果,主干周长40厘米的可留400个果,主干周长50厘米的可留600个果,主干周长60厘米的可留1050个果。

  三、桃树留果原则

  大果型桃树品种比小果型品种留果少、鲜食桃果品种比加工用桃果品种留果要少,长势弱的桃树比长势强的桃树留果要少。疏果通常自上而下,由内向外按枝顺序分2~3次再定果;早熟果品种一般疏果1次,中熟果品种一般疏果2次,晚熟果品种一般疏果3次,生理落果少的品种疏果次数宜少,生理落果多的品种疏果次数宜多。

  四、桃树疏果时间

  桃树疏果时间一般在盛花后20~30天进行,无花分的桃树品种在盛花后30天后进行疏果。

  五、桃树疏果方法

  桃树疏果首先疏除发育不良的小果、畸形果、病虫果、其次疏除着生位置差的果实(如背上果、结果枝基部和枯部果、花束状结果枝和无叶芽枝上的果实)。

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  以上就是小编介绍桃树怎么疏果,如您有更好的补充请留言告诉我们。

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