桂热杧120号叶片主要营养元素含量变化研究

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。

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

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.