摘要： 本项试验进一步查明青椒保护地栽培每1000平方米保留4600个主枝, 采取每株保留2个主枝比每株保留4个主枝的增产幅度下限为13.6%。采取每枝保留2主枝, 叶面积系数为4左右, 保持了比较合理的群体结构, 同时可使单位面积的根系持有量增加3.5%以上。并阐明根系数量和小区产量之间有密切的正相关关系。故此研究作物的群体结构不能局限于地上部, 根系的数量和分布状况也是不可忽视的问题。

关键词: 青椒, 主枝数

Abstract: This paper reported that the sweet pepper(Capsicud frutescens L. var. grussum Baily)cultivated in film covered hothouse kept 4600 leader branches per 1000 m², and diffenent training methods were compared. The result of experiment showed that the yield of plannt 2 with leader branches was at least 13.6% higher than that of plant with 4 leader branches. The method of remainning 2 leader branches made population structure equitable and gave appropriate L. A. I. (about 4), meantime increased the amount of root system per unit area by 35%. There were significantly positive correlation between the harvest in the plot and the increment of root. The paper suggested that studying of population structure of crops should not be limited on aerial growth, the accumulative amount of root system and their distribution also shouldn’t be ignored.

Key words: Sweet Pepper, Number of leader branchs