<正>通过对1年生印楝实生苗木群体的动态研究，建立了苗木的年生长模型、连日生长量模型和日平均生长量模型。并据此模型将印楝苗木生长节律划分为4个阶段：出苗期（10月中旬至下旬）、生长初期（11月上旬至翌午4月中旬）、速生期（4同下旬至9月下旬）和生长后期（10月上旬至下旬）；苗木生物量积累与苗高、地径的函数模型关糸表明，苗术生物量（包括地上部分、地下部分和全株干重）与苗高、地径的相关性极为密切，其中全株干重占全株鲜重的38.8%，地上部分干重占全株鲜重的26.8%，占全株干重的69.1%；同时，以苗高、地径为参考指标，对9个月生的印楝造林苗木进行了数量分级标准划分，并运用该分级标准进行造林试验，结果表明将印楝造林节木从数量指标上划分为I级、Ⅱ级和Ⅲ级是科学合理并切实可行的，其中仅I级与II级可以用作造林合格苗木。

Synthesis of the medicinal intermediate (R)-(-)-3-chloro-2-hydroxypropyl tosylate was carried out by the reaction of (R)-(-)-3-chloro-1,2-propanediol and p-toluenesulfonyl chloride in this paper. The influences of the reaction temperature, reaction time, type and dosage of solvent, type and dosage of catalyst, and (R)-(-)-3-chloro-1,2-propanediol/p-toluenesulfonyl chloride ratio on the selectivity of esterification and yield of product were investigated. The suitable synthesis conditions were obtained by optimization with orthogonal experiments: reaction temperature 0°C, reaction time 6h, the molar ratio of p-toluenesulfonyl chloride to (R)-(-)-3-chloro-1,2-propanediol 1.2:1, the molar ratio of catalyst NaOH to (R)-(-)-3-chloro-1,2-propanediol 1.2:1. Ethyl acetate was used as solvent, and the concentration of (R)-(-)-3-chloro-1,2-propanediol was 125g/L. The yield of (R)-(-)-3-chloro-2-hydroxypropyl tosylate was over 85%.