不同产地气象因子对宁夏枸杞果实糖分积累的影响

以‘宁杞1号’枸杞为材料,采用高效液相色谱技术,测定不同产地(宁夏银川、甘肃白银和青海德令哈)不同发育时期宁夏枸杞果实中的糖分(果糖、葡萄糖、蔗糖和淀粉)含量,同时对不同产地果实发育期间的气象因子进行监测,探讨主要气象因子对枸杞果实糖分积累的影响。结果表明:(1)在宁夏枸杞果实发育期内,不同产区平均温度和昼夜温差均为银川白银德令哈的变化趋势,平均光照强度为银川白银德令哈。(2)3个产区‘宁杞1号’枸杞的果实发育过程中均以积累己糖(葡萄糖和果糖)为主,蔗糖和淀粉含量很少;成熟果实中己糖含量为德令哈银川白银。(3)影响‘宁杞1号’枸杞果实己糖积累的气象因子在银川产区主要是平均温度、白天均温和平均温差,在白银产区主要是平均温差,白天温度和平均光强也有一定影响,而在德令哈产区主要是平均温差、平均光强和白天均温。研究认为,宁夏枸杞果实发育期间银川产区较高的平均温度和昼夜温差与德令哈产区较强的平均光强和较长的光照时数均有利于枸杞果实己糖积累,而白银产区较大的相对湿度和较弱的光强均成为枸杞果实糖分积累的主要限制因子。

Effect of Meteorological Factors of Different Regions on Sugar Accumulation in Lycium barbarum L.Fruit

With Lycium barbarum L.cv.Ningqi No.1 as material,using high performance liquid chromatography (HPLC) technology,we determined different development period of L. barbarum L.fruit sugar (Fructose,Glucose,Sucrose and Starch) content in different regions (Yinchuan in Ningxia,Baiyin in Gansu and Delingha in Qinghai).At the same time,we monitored the meteorological factors during development of fruit in different regions to discuss the effect of main meteorological factors on sugar accumulation in L. barbarum L.fruit.The results showed that:(1) During the fruit development period of L. barbarum L.,the mean temperature and the temperature difference between day and night of different regions presented the change trend of Yinchuan>Baiyin>Delingha,while the mean light intensity presented YinchuanL. barbarum L.fruit was given priority to with accumulation of hexose (glucose and fructose),sucrose and starch content rarely.The content of hexose in the ripe fruit was in the order of Delingha>Yinchuan>Baiyin.(3) The meteorological factors that affected sugar content of L. barbarum L.fruit in Yinchuan region mainly were mean temperature,daytime mean temperature and mean temperature difference,and in Baiyin region mainly were mean temperature difference,temperature during the day and mean light intensity also had a certain influence,while in Delingha region mainly were mean temperature difference,mean light intensity and daytime mean temperature.This research suggested that higher mean temperature and mean temperature difference in Yinchuan and stronger mean light intensity and longer light hours in Delingha were conducive to L. barbarum L.fruit hexose accumulation.Meteorological factors limited the sugar accumulation of L. barbarum L.fruit mainly were bigger relative humidity and weaker light intensity in Baigin region.