一、引言 老茶园给改植后的茶树生育带来恶劣的影响,这是熟知的事实。广义而言,这是一种连作障害,但其原因至今尚无统一结论,也无明确的防治措施。因此,这种改植后,植株生育不良,产量下降的现象,一般称为“忌地现象”。 I. INTRODUCTION The old tea plantation has brought adverse effects on the fertility of tea plants after planting, which is a well-known fact. In a broad sense, this is a contingency disorder, but the reason for it is that there is no unanimous conclusion to date and there is no clear prevention and control measure. Therefore, after this kind of replanting, the phenomenon of poor plant growth and yield decline is generally referred to as “phenomenon of avoiding land.”