番茄植株在生长过程中,有时中下部叶片会出现上卷成筒状或半筒状的现象。原因有以下四个方面:一是病毒侵染;二是土壤中微量元素补充不足;三是整枝摘心过重,植株保留叶片少;四是土壤干旱或地温太低,根系吸水力弱,造成蒸腾与吸水比例失调,诱发卷叶。 Tomato plants in the growth process, sometimes in the lower part of the leaves will be rolled into a tubular or semi-cylindrical phenomenon. The reasons are the following four aspects: First, the virus infection; Second, trace elements in the soil to make up for lack of; Third, pruning overblown leaves less plants retained; Fourth, soil drought or ground temperature is too low, weak root absorption, resulting in transpiration Imbalance with the water absorption, inducing curly leaves.