蜀冠龙眼幼树结果母枝质量评价研究

研究结果表明,8月上中旬抽发的健壮秋梢是蜀冠龙眼最重要的结果母枝,其着果量与枝粗度及单位长度枝梢上的复叶数呈极显著正相关,并提出了蜀冠龙眼优良结果母枝的生物学指标;花芽分化期叶片的营养元素及可溶性糖含量是影响龙眼秋梢能否成花、结果的决定因素,在营养达标范围内,叶片氮素含量与秋梢的成花、着果量成正比关系,与磷、钾素含量无相关.

EVALUATION OF THE QUALITY OF BEARING BASE SHOOTS OF YOUNG "SSHUGUAN" LONGAN TREES

In the present study, the vigorous and healthy fall shoots developed in early and mid-August were found to be the most important bearing base shoots for the variety Shuguan of Longan (Dimocarpus longan Lour.) Its fruit setting was in a highly significant positive correlation with the diameter and leaf number of the shoot. The key factors that affect flower differentiation and fruit setting are the contents of nutrients and total sugars in the leaves in the flower bud differentiation period. With adequate nutrient supply, flower-bud formation and fruit setting amount of the autumn-developed bearing shoots are positively correlated with N content in the leaves and non-correlated with P or K content.