桂热杧120号叶片主要营养元素含量变化研究

Changes of Main Nutrition Element Content in the Leaves of 'Guire mang 120'

以桂热杧120号为试材,研究了不同物候期叶片N、P、K、Ca、Mg、B等含量的变化。结果表明:在花芽分化期,叶片中N、P、K、Mg含量较高,随着开花坐果和果实发育而逐渐降低,N、K含量在果实发育第二次高峰后期降至最低点,P、Mg含量在幼果期降至最低点,而在果实发育后期至采果后抽生的新梢老熟期均又回升。Ca含量从花芽分化期开始呈上升趋势,至幼果快速生长期达到最高点,随后逐渐降低。B含量从花芽分化期开始随果实生长发育而缓慢上升。

Taking ＂Guire mang 120＂as researching material, The nutrition elements content of N, P, K, Ca, Mg and B were studied in the leaves from different Phonological Phases. The results indicated that, the contents of N, P, K and Mg in the leaves were higher in the period of flower bud differentiation, then they decreased as flowering, fruit bearing and development. The contents of N and K decreased to minimums in the second period of fruits fast growing. While the content of P and Mg decreased to minimums in the initial period of fruits growing. But they all increased from the last period of fruits growing to the period of post - harvesting new shoot matured. The Ca content began increasing in the period of flower bud differentiation and had an increasing peak in the initial period of fruits growing , then＇ decreased as fruits development. From the period of flower bud differentiation to the period of fruits growing the B content increased slowly.