猕猴桃不同树龄冻害调研报告

Kiwifruit Research Report Freezing of Different Ages

为了掌握2009年早雪冻害对陕西猕猴桃树的影响,制定应对措施,提出今后防冻和抗冻研究的方向与重点,对陕西产区4个主产市进行了大规模调查。结果表明:陕西猕猴桃树平均受冻株率为31.3%;受冻程度与树龄关系十分密切,随着树龄的增大冻害愈轻;实生苗1～3a树龄冻株率依次为64.0%、28.0%和11.7%,嫁接树龄1～5a冻害株率依次为58.5%、27.1%、25.5%、10.9%和0.3%;6a以上树龄的大树几乎无冻害,尤其主茎无冻害;在受冻树龄中,以1a生的受冻最为严重,嫁接成品树平均冻害株率58.5%,除武功县外其它县区冻害株率均达到60%以上,调查中出现个别幼树园冻害株率几乎达100%,而2～3a生树龄相对较轻,但2a生树死亡率较高,4a生以上树龄冻害明显减轻。

In order to grasp the freezing snow as early as 2009,the tree of Shaanxi kiwi to develop response measures of frost and freezing for future research directions and focus on four main production city of Shaanxi producing largescale survey carried out. The results showed that the average cold line of Shaanxi kiwi fruit tree was 31.3% ;freezing level very close relationship with age,the increase of frost damage as the trees more light;seedlings 1 to 3 years old were frozen strain rate 64.0% ,28. 0% and 11.7% ,1 to 5 years old grafted ptants freezing rate were 58. 5% ,27. 1%, 25.5%,10. 9% and 0. 3%;more than 6 years old, almost no cold damage, particularly in the main stem without freezing;age in the cold in the cold to 1 year old the most serious tree grafting product line rate of 58.5 % on average frost damage,in addition to Wugong county other counties outside the county freezing rate reached 60% or more; investigations occur in isolated frost damage garden plants saplings rate of almost 100%, while the 2-3 years old trees were relatively mild,more than 4 years old trees frost damage was reduced.