土壤施钙对设施油桃贮藏期间果实抗氧化系统的影响

Effects of Applying Calcium in Soil on Fruit Antioxidant System of Nectarine under Protected Culture during Storage Period

为合理调控设施油桃钙素营养,改善设施油桃果实贮藏品质,延长设施油桃果品货架期,以贮藏期间的设施曙光油桃为试材,研究了不同施钙水平对油桃果实抗氧化酶活性及膜透性的影响。结果表明,与不施钙肥(对照)相比,土壤施钙显著增强了贮藏期间设施油桃果实抗氧化酶超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)的活性,三者均在贮藏后第10天达到峰值,分别为55.4U/g、5.27U/(g·min)、26.7U/g,其后随贮藏时间延长其活性呈下降趋势;随贮藏时间的延长,土壤施钙处理果实的相对质膜透性及丙二醛(MDA)含量呈上升趋势,至贮藏第30天达到最大值,分别为60%和6.17mg/g,整个贮藏期间土壤施钙处理果实质膜透性及MDA含量(P<0.05)低于对照。采前土壤施钙可显著提高贮藏期间设施油桃的SOD、POD、CAT活性,并显著降低设施油桃果实的质膜透性及过氧化产物MDA的积累。

The effects of applying calcium in soil on fruit physiology characteristics of nectarine （Prunus persica var. nectarina cv. Shuguang） under protected culture during storage period, so as to improve the the quality of the stored nectarine and prolong the storage time. The results showed that the application of calcium fertilizer in soil increased significantly the activity of SOD, POD, CAT of nectarine during storage period, and which reached the maximum value at the tenth day after storage with 55.4 U/g,5.27 U/（g· min） and 26.7 U/g respectively,then the activity of SOD,POD,CAT declined with storage time. The application of calcium fertilizer in soil decreased significantly the membrane permeability and the content of MDA of nectarine during storage period, though the membrane permeability and the content of MDA of nectarine increased with storage time,and reached the maximum value at the 30th day after storage with 60.0% and 6. 17 mg/g. Overall, the application of calcium fertilizer in soil increased significantly the activity of SOD, POD, CAT of nectarine, and decreased significantly the membrane permeability and the content of MDA of nectarine during storage period.