不同核桃品种负载特性研究

Characteristics of Fruits Load of Different Juglans regia Varieties

  • 摘要: 以川早2号、惠耀、绵核2号、清香、蜀江2号、硕星、温185和盐源早8个核桃品种为研究对象,于2018年8月调查不同等级复叶数的结果枝个数,分析不同品种间负载特性的差异性。结果表明:8个核桃品种的结果枝直径为7.0~15.0 mm,占调查总数的86.2%;结果枝上的复叶数为5~6片的占调查总数的30.3%。单果和双果的结果枝直径间差异不显著,但均与三果的结果枝直径差异显著;单果、双果和三果的结果枝上的复叶数间差异显著。结果枝留果量为单果时至少需要3~4片以上的复叶,留果量为双果和三果时至少需要5~6片复叶以上才能保持正常的果实发育成熟,故对于难以维持果实正常发育成熟具1~2片复叶的果枝,应该疏除小果。核桃是强枝壮枝结果,单果的结果枝直径需要在7.00 mm以上,双果及三果以上的结果枝直径需要在8.00 mm才果实能正常发育,直径在7.00 mm以下的结果枝几乎坐不住果,应疏除。

     

    Abstract: In August 2018, the fruit bearing amount and its branch diameter of 8 kinds of walnut varieties named Chuanzao2, Huiyao, Mianhe2, Qingxiang, Shujiang2, Shuoxing, Wen185 and Yanyuanzao were investigated in Sichuan Province. And the characteristics of fruits load were analysis. The results showed that the bearing branch diameter of 8 walnut varieties was in range of 7.0−15.0 mm which accounted for 86.2% of the total number of bearing branches. The number of compound leaf in bearing branches were 5−6 pieces accounted for 30.3% of the total number of branches. There was no significant difference in bearing branches diameter between single-fruit and double-fruit, and they were significant with the bearing branches diameter with three-fruit. There was significant difference among the compound leaf number in bearing branches with single-fruit, double-fruit and three-fruit. In order to maintain normal fruit development and maturity, at least 3−4 leaves were needed for single-fruit, and at least 5−6 leaves were needed for double-fruit and three-fruits. The bearing branches with 1−2 compound leaves should be eliminated the fruitlet because it is difficult to maintain the normal development and maturity of the fruit. The diameter of bearing branches with single-fruit should be more than 7.0 mm, with double-fruit and three-fruits should be more than 8.0 mm which can ensure the fruit develop normally. The bearing branches diameter less than 7.0 mm should be removed, because it almost can't set fruit.

     

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