晚秋叶施高浓度肥料对梨树翌年生长发育的效应

在梨树上进行尿素、磷酸二氢钾、硼肥及其混合液的高浓度晚秋叶施处理 ,研究其对翌年树体的物候期及成花状况、叶片质量及果实品质等指标的影响。结果表明 ,所有肥料的单施处理都明显促进了花粉管的伸长发育 ,增强了树体的水分利用能力。尿素晚秋叶施有利于花芽的进一步分化 ,促进了物候期提前 ;磷酸二氢钾的晚秋叶施使叶片厚度增加 ;硼肥则对果实重量的最终形成具有一定促进作用

Effects of late autumn foliar applicationof high concentration fertilizers on the growth and development in pear tree

Treatments on pear trees were conducted with high concentration of urea,potassium bi hydrogen phosphate,boronic acid and their mixtures.Effects of the treatments on the phenophase of sprouting and blooming form in the following year,quality of leaves and fruits were studied systematically.The results indicated that all of the treatments of a fertilizer alone stimulated the elongation of pollen tube,and enhanced the utilization of water in the following year.Some of them produced some significant effects.In addition,urea application evaluated the floral bud formation and made the phenophase of sprouting ahead,potassium bi hydrogen phosphate thickened leaks,boron fertilizer had an active effect on increasing the fruit weight.