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利用核磁共振技术测定了生长在水分胁迫和非胁迫条件下的２０个小麦品种不同生长阶段叶水分子自旋一晶格张驰时间Ｔ１．从而确定它们的耐旱性。这种测定是在盆栽和大田生长的植株上进行的．叶水分含量、相对水分含量以及叶水势与叶水分子张驰时间Ｔ１具有很强的相关性。耐旱小麦品种叶水分子张驰时间Ｔ１比敏感品种的Ｔ１显著的高．无论生长条件怎样。发现在作物处于分率期不同小麦基因型的Ｔ１值变化最大。因此．分荣期叶子水分Ｔ１值的测定为评价小麦耐旱基因型提供了一个快速测定途径．
The spin-lattice relaxation time T1 of leaf water molecules at different growth stages of 20 wheat cultivars growing under water stress and non-stress conditions was measured by nuclear magnetic resonance technique. Thus determining their drought tolerance. This assay is performed on potted and field grown plants. Leaf water content, relative water content and leaf water potential and leaf water molecules relaxation time T1 has a strong correlation. The leaf-water molecular relaxation time T1 of drought-tolerant wheat cultivars was significantly higher than that of susceptible cultivars T1. No matter what the growth conditions. It was found that the T1 value of different wheat genotypes had the most change in the crop period. therefore. The determination of the T1 value of leaf moisture during the evaluation period provided a rapid way to evaluate the drought-tolerant wheat genotypes.