一、问题的提出茶树新老套种是老茶园改植换种的一条新途径,这一技术的提出基于下列三个方面:1.任何多年生作物都有一定的经济年限,茶树的经济年限一般认定为40～60年,超过这个年限的衰老茶园,即使进行树冠更新或采取其它先进的栽培管理措施也难以恢复树势,获得较好的经济效益。就我省而言,现有茶园面积160多万亩,其中解放前建立的茶园仍然占有不小的比重,六十至七十年代建立的茶园或因基础建设质量差,或因管理粗放,或因品种低劣,大多数茶园已 First, the issue put forward Tea old and new sets of old tea plantation replaces a new way, this technology is proposed based on the following three aspects: 1. Any perennial crops have a certain economic period, the general economic life of tea trees The tea plantations aged 40 to 60 years and older than this age are difficult to restore the tree vigor and obtain better economic benefits even if the tree canopy is renewed or other advanced cultivation and management measures are taken. For our province, the existing tea plantation covers an area of ​​over 1.6 million mu, of which the tea plantation established before liberation still occupies a large proportion. The tea plantations established in the 1960s and the 1970s are either of poor quality due to infrastructural construction or extensive management or Due to poor varieties, most of the tea garden has