在露地栽培条件下，对19个板蓝根新品系在结籽期的物候期和主要农艺性状进行了比较，试验结果表明，各品系在结籽期的返青期最大极差为20 d，展叶期最大极差为22 d，现蕾期最大极差为23 d，开花期最大极差为21 d，结荚期最大极差为10 d，株高最大极差为52 cm，单株分枝数最大极差为24个，千粒重最大极差为7.39 g，单株种子产量最大极差为67.0 g。其中品系BLGZX2012-18的种子千粒重系数最大，为4.225，与其余各品系间自成一类。由于晚熟类型营养生长期较长，因此其根系产量亦较高，在进行新品系筛选时应首先考虑晚熟类型和千粒重较大的类型。

The phenophase and main agronomic traits of 19 new Isatis indigotica Fort . lines were compared at seed beating period， under the open field cultivation onditions. The experimental results showed that among the different lines， the widest range of at returning green stage can be 20 d， that of the the leaf-expansion period can be 22 d， that of the squaring period can be 23 d， that of the the blooming period can be 21 d， that of the bearing pod period can be 10 d， that of the number of branches per plant can be 24 poor months， that of the height was 52 cm， that of the grain weight was 7.39 g， that of the seed yield per plant was 67.0 g， which the seed weight coefficient of BLGZX2012-18 had the largest 4.225， and the rest of the lines between the sui generis . Because of the late mature types had the longer stage of vegetative growth， so its roots yield is higher， we should be firstly considered in late mature types and grain weight larger type when new lines was screened and selected .

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甘肃省定西市科技攻关计划项目“板蓝根新品种筛选及推广”(2012DXKJAS02)部分内容