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用10,15,20,25mmol/L Ca(NO3)2以喷施方式处理5a生、15a生、25a生库尔勒香梨树,分别测定不同低温处理下不同生长年限库尔勒香梨树1a生枝条细胞膜透性及脯氨酸含量。结果表明,5a生库尔勒香梨树在25mmol/L Ca(NO3)2处理后脯氨酸含量累积量最多,比15a生树高出29.13%,比对照(4℃)处理增加了2.31倍,膜透性增加幅度为3.37倍。15a生库尔勒香梨树在10mmol/L Ca(NO3)2处理后,比对照温度处理下枝条的脯氨酸含量增加幅度为88.47%,膜透性增加了2.53倍。25a生库尔勒香梨树在20mmol/L Ca(NO3)2处理后,比对照温度处理下枝条的脯氨酸含量增加幅度为86.52%,膜透性增加了2.32倍。综合分析表明,5a生库尔勒香梨树经过20~25mmol/L Ca(NO3)2处理、15a生库尔勒香梨树经过10mmol/L Ca(NO3)2处理、25a生库尔勒香梨树经过20mmol/L Ca(NO3)2处理可提高抗寒性。
The root growth rate of roots of Korla fragrant pear under different low temperature treatments was measured by spraying with 5, 10, 20, 25mmol / L Ca (NO3) Permeability and proline content. The results showed that the accumulation of proline content in roots of A. karroff rose 25.13% at 25 mmol / L Ca (NO3) 2 treatment, 29.13% higher than that at 15a, 2.31 times higher than the control Permeability increase of 3.37 times. After 15 mmol / L Ca (NO3) 2 treatment, the proline content of shoots increased by 88.47% and the membrane permeability increased by 2.53 times than that of the control. 25a Health Korla fragrant pear in 20mmol / L Ca (NO3) 2 treatment, compared with the control temperature treatment branches proline content increased by 86.52%, membrane permeability increased by 2.32 times. Comprehensive analysis showed that after 5 years old Korla pear treated with 20 ~ 25mmol / L Ca (NO3) 2, 15a Korla fragrant pear treated with 10mmol / L Ca (NO3) 2, Ca (NO3) 2 treatment can improve cold resistance.