摘要
以库尔勒香梨为试验材料,秋季落叶前2周进行水杨酸（SA）0.5,1.0,2.0 mmol/L,腐胺（Put）1.0,5.0,10.0 mmol/L,亚精胺（Spd）0.5,1.0,2.0 mmol/L等3个药剂、9个不同处理,取样后在人工低温处理条件下分析库尔勒香梨的抗冻性。试验结果表明,相对电导率、脯氨酸、MDA、SOD的累积贡献率达到94.1%,可作为库尔勒香梨主要的抗寒性鉴定指标,其中,相对电导率贡献率为71.6%,可单独作为库尔勒香梨抗寒性的鉴定指标。3种药剂处理后枝条的抗冻强弱顺序为1.0 mmol/L SA〉2.0 mmol/L SA〉5.0 mmol/L Put〉1.0 mmol/L Spd〉0.5 mmol/L Spd〉对照。在生产实践中,可根据实际情况于果实采收后喷施浓度1.0-2.0 mmol/L的水杨酸,以提高库尔勒香梨在越冬期的抗冻性。
The freezing resistance of Korla fragrant pears was studied in this article. The branches were treated by different concentration of SA（0. 5,1.0,2.0 mmol/L）, Put （1,5,5mmol/L）, Spd （0. 5,1. 0, 2.0 mmol/L） before the leaves fall,the resistance freeze of Korla fragrant pears on artificially lower temperature were analyzed. Test results show that the relative electrical conductivity, proline,MDA and SOD accumulation contribution reached 94.1%. These can be used as main identification indexes of freezing resistance of Korla pear. Especially the relative electrical conductivity was 71.6% which can be used as the identification rate of freezing resistance of Korla fragrant pear, the sequence of freezing resistance of the branches treated with 3 treatments were as follows：branches is 1.0 mmol/L SA）2.0 mmol/L SA〉5.0 mmol/L Put〉1. 0 mmol/L Spd〉0.5 mmol/L Spd〉CK. So in agriculture production,spraying 1.0〉2.0 mmol/L SA after fruit harvest can improve the freezing resistance of Korla fragrant pears in over-wintering stage.
出处
《新疆农业大学学报》
CAS
北大核心
2009年第5期56-62,共7页
Journal of Xinjiang Agricultural University
基金
国家科技支撑项目(2007BAD36B05)
关键词
药剂处理
库尔勒香梨
枝条
抗冻性
different treatments
Korla fragrant pear
branches
antifreeze strength
