微量元素硼对水蜜桃的生理效应

Physiological Effect of Boron on Peach

硼对水蜜桃的营养生长和生殖生长都有很大影响。土壤缺硼可导致水蜜桃生长不良和“花而不实”。不同浓度硼砂(B)处理的结果表明:土施B2两/株和叶片喷洒B0.05％(含硼元素60ppm)对缺硼土壤上水蜜桃的营养生长和生殖生长效果最佳,能提高水蜜桃叶片的硼、叶绿素含量,增大光合作用面积,提高座果率和加快幼果生长速度。80～100ppm的硼酸(含硼元素13.6～17ppm)对花粉萌发和在花粉管的生长具有促进作用,硼酸浓度超过100ppm则起抑制作用。

Peaches were treated by different concertration of boron. The best results of nutritive growth and reproductive growth of peach growing in the earth lacking of boron were observed, when 100g of borax per peach was applied or 0.05% of borax was sprayed. By these treatment, the levels of boron and chlorophyl in the leaves and the percentage of fruit setting are increased and the growth of young fruits is accelerated. 80—100ppm of boric acid has the effect of promoting the pollen germination and the growth of pollen tube. But the inhibition appeared as the concentration of boric acid is over 100ppm.