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猕猴桃(Actinidia deliciosa var.deliciosa)果园的产量大幅度下降,这与硼的过量有关。减产的原因是果实数量减少,果实大小受影响不大。叶中硼的含量与果实产量有着密切关系。挂果中期从植株侧采叶测得硼含量大于80μg/g(干重)的收成减产超过10%。从植株藤蔓覆盖的地表耕作层15cm 取土进行热水馏蒸,析出硼,其含量与植株叶片中硼含量有着密切关系。耕作层中硼含量超过0.5μg/g(干重),叶片的硼含量也有明显的提高。而取耕作层15cm 以下的土壤做对比,这个关系就不太明显。把硼过量的果实置于0.5—1.0℃低温贮藏140天对可溶性固形物没有影响,并都随时间形成一个逐渐增长的曲线,然而从透度计测定可看出,受严重影响的植株的果实会提早成熟而软化。果实中因为硼过量导致钙含量下降可能是果早熟软化的主要原因。
The yield of Actinidia deliciosa var. Deliciosa orchards has dropped significantly, which is related to the excess of boron. The reason for the decrease is the decrease in the number of fruits and the small size of the fruit. Leaf boron content and fruit yield are closely related. In the mid-fruiting stage, the harvest of more than 80μg / g (dry weight) boron measured from the side of the plant was reduced by more than 10%. Planting vine from the surface layer of 15cm soil to take hot pot distillation, precipitation of boron, the content of boron content in plant leaves are closely related. The content of boron in the tillage layer exceeds 0.5μg / g (dry weight), and the content of boron in the leaves also increases obviously. Take the soil below 15cm below the top of the crop for comparison, this relationship is not obvious. Placing excess Boron fruits at 0.5-1.0 ° C for low temperature storage for 140 days had no effect on soluble solids and all formed a gradually increasing curve over time whereas it was evident from dialometer determinations that the fruits of severely affected plants Will mature and soften earlier. The decrease of calcium content in fruit due to excess boron may be the main reason for fruit precocious softening.