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首页> 外文期刊>Acta Horticulturae >Thinning response of 'Summerred' apple to Brevis~R in a northern climate
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Thinning response of 'Summerred' apple to Brevis~R in a northern climate

机译：在北方气候中对“Summerred”苹果的响应响应

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The response of three-year-old 'Sumtnerred' trees to crop load regulation by the chemical thinning agent Brevis~R was tested in comparison with different levels of hand thinning. Brevis~R was applied once or twice at a dosage of 1.1 and 2.2 kg ha-1 whenfruitlets were approximately 15 and 19 mm in diameter at the time of the first and second application, respectively. All Brevis~R applications significantly reduced the number of fruits tree~(-1). Both the single application of 2.2 kg ha1 and the two-fold application of 1.1 kg ha1 thinned the tree to the target crop load level of 30 apples tree~(-1). The degree of thinning by the single application of 1.1 kg ha1 Brevis~R did not significantly increase fruit weight and resulted in a very strong inhibition of return bloom similar to that observed in the untreated controls and trees hand thinned to 60 fruits tree~(-1). Return bloom was positively related to the level of thinning obtained. At the target fruit load of about 30 apples tree~(-1), return bloomwas around 40% of the bloom in the year of the thinning trial. A further thinning to circa 15 fruits tree~(-1) increased return bloom to approximately 60%. In conclusion, 'Summerred' trees planted as two-year-old feathered trees should not bear more than 20 to 25 fruits tree~(-1) in their 3rd leaf in a northern climate to avoid the onset of biennial bearing and to ensure regular annual yields. Only then sufficient numbers of flower buds will develop to have the chance to obtain a good crop in the nextyear.
机译：与不同的手薄化水平相比，测试了三岁的“SUMTERRED”树木对化学稀释剂BREVIS〜R作物负荷调节的响应。在第一和第二施用时，在1.1和2.2kg HA-1的剂量下施用一次或两次，分别在第一和第二施加时的直径为约15和19mm。所有Brevis〜R应用明显减少了水果树的数量〜（-1）。 2.2 kg Ha1的单一应用均为1.1 kg Ha1的两倍施用将树变薄为30苹果树的目标作物负载水平〜（-1）。通过1.1kg Ha1 Brevis〜R细化的程度没有显着提高果子重量，导致与在未处理的对照和树木手中观察到的返回绽放的返回盛开的抑制非常强烈抑制到60个水果树〜（ - 1）。返回绽放与获得的减少水平正相关。在约30苹果树的目标果实载荷〜（-1），在稀疏试验中返回盛开的40％左右的绽放。对大约15辆水果树的进一步变薄〜（-1）增加返回盛开约60％。总之，“Summerred”树作为两岁的羽毛树木种植不应超过20到25家水果树〜（-1）在北方气候中的第3叶中〜（-1），以避免两年轴承的发作，并确保定期年产量。只有那么才有足够数量的花蕾将产生有机会在Nextyear中获得良好的作物。

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