一种测定葡萄新梢木质部水势的新方法A new method for measurement of xylem water potential of grape shoot
王庆江,及歆荣
摘要(Abstract)：
【目的】为了能够连续、即时测定葡萄新梢木质部水势,【方法】以无核白鸡心葡萄为试材,通过同时测定葡萄叶柄木质部导管平均流量和流速,应用变形的哈根-泊萧叶方程,研究了这种连续、即时测定葡萄新梢木质部水势的新方法。【结果】结果表明,在直径为4 mm的葡萄叶柄上,用此新方法测得的葡萄叶柄两端压力差与实际所加压力差吻合的很好,说明此新方法可用于连续、即时测定葡萄叶柄两端压力差。用此新方法在葡萄新梢上测定发现,葡萄新梢木质部水势日变化初步显现"倒双峰曲线",并且葡萄新梢木质部水势与叶水势之间成线性正相关。【结论】此新方法能够连续、即时测定葡萄新梢木质部水势。
关键词(KeyWords)： 葡萄;流量;流速;哈根-泊萧叶方程;木质部水势
基金项目(Foundation): 邯郸市科学技术研究与发展计划项目(1122101039-6)
作者(Author): 王庆江,及歆荣
DOI: 10.13925/j.cnki.gsxb.2012.04.032
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