Abstract: The experiment on 4 different sowing dates with 7 varieties of Autumn lettuce was conducted,the results showed that earlier bolting is closely correlated with sowing date and varieties. Wide round leaf va rieties are tolerant to bolting,long round leaf varieties take the second place and spear leaf varieties are easy to bolting. The optimum sowing date of autumn lettuce is in the middle of August in Yangzhou district and there are many varieties for the sowing date. If sowing date were ahead of the m...

摘要： 对７ 个秋莴笋品种的４ 个播种期进行了比较试验，结果表明先期抽笋与品种和播种期密切相关。阔圆叶品种最不易先期抽笋，长圆叶品种次之，尖叶品种最容易先期抽笋。秋莴笋合适的播种期在８ 月中旬，合适的品种也比较多，若播种期提前到７ 月中下旬，只能选用圆叶品种。

关键词: 秋莴笋, 播种期, 品种