CPPU对春季大棚萝卜糠心、抽苔和产品的影响

本文以上海地区广泛栽培的“四季小政”、“白玉春”、“天春”和“上农９３６”作供试材料。自肉质根开始膨大时用５ｍｇ／Ｌ的ＣＰＰＵ溶液进行叶面喷洒，每４天喷洒１次，共喷４次。研究结果表明，ＣＰＰＵ能有效地抑制春季大棚萝一的糠心和抽苔，同时显著地提高了萝一肉质根的产量。

EFFECTS OF CPPU ON HOLLOWING,BOLTING AND YIELDS OF RADISH (Raphanus sativus L. )

The radish cultivars "Sijixiaozheng","Baijyuchun", "Tianchun" and "Shangnong 936" widely grown inShanghai were tested. The solutions with a content of 5 mg L -1 'CPPU [ N - (2 - chloro- 4- pyridyl)- N ' - phenyl-urea] were sprayed on the leaves of radish one time every four days since the fleshy roots begun bulging. There werealtogether four treatments for these materials respectively. The results showed that CPPU could effectively suppressthe hollowting and bolting in radish f Raphanus sativas L. ) , meanwhile remarkably increasing the yields of the fleshyroots.