京研迷你2号黄瓜生长发育及产量性状分析

定量化研究迷你型黄瓜的生育特性，对深入了解品种特征，进行精准化栽培管理具有重要意义。本文以生长度日（GDD）为度量单位，对迷你黄瓜京研迷你2号的生育进程、形态特征、干物质分配及产量形成等方面进行了定量化分析，并比较了秋冬季和春季不同栽培茬口环境下京研迷你2号与普通型黄瓜瑞光2号在生育特性和产量性状方面的差异。在生育特性上，京研迷你2号在缓苗期株高增长率为0.022 cm/(℃?d)，缓苗后为0.585 cm/(℃?d)，并且株高受低温抑制作用相对明显；出叶速率在缓苗期为0.016 叶/(℃?d)，缓苗后为0.040叶/(℃?d)；缓苗期叶片扩展速率为2.833 cm2/(℃?d)，缓苗后为15.873 cm2/(℃?d)，并且受高温抑制作用相对较小，而瑞光2号叶片扩展受高温抑制作用相对明显。在产量性状上，京研迷你2号在GDD达到773 ℃?d时进入结果期，坐果率为7.7 果/株，干物质向果实分配比例大，产量也相应较高，每100株产量在秋冬茬高出瑞光9.35kg，春茬高出瑞光4.17kg，并且两品种在春季茬口产量明显高于秋冬季茬口。京研迷你2号在形态特征、生育进程及干物质分配上与瑞光2号存在差异，由此也造成了产量的差异。因此，针对迷你型黄瓜结果期早，产量高，不耐低温的特点，应相应调整栽培管理措施，加强温度及水肥管理，最大程度发挥其产量优势。

Analysis of Growth and Development and Yield of Mini-cucumber (Jingyan mini-2)

Quantitative study on growth character of mini-cucumber has great significance for understanding breed characteristics and precision management. GDD is used in this article as Metro-unit to quantitatively analysis the development, morphogenesis, dry matter allocation and yield of mini-cucumberJingyan mini-2 , and compared the difference betweenJingyan mini-2 cucumber andRuiguang-2 cucumber in growth character and yield traits. Growth character shows that the height growth rate in rejuvenation period is 0.022 cm/（℃·d） , after rejuvenation it becomes 0.585 cm/（℃·d） and low temperature inhibited height growth significantly; leafing rate is 0.016 leaf/（℃·d） in rejuvenation period and 0.040 leaf/（℃·d） after rejuvenation and leaf expansion rate is 2.833 cm2/（℃·d） in rejuvenation period and 15.873 cm2/（℃·d） after rejuvenation. High temperature has little inhibition on leaf expansion ofmini-2 but has a great effect onRuiguang-2 leaf expansion. Yield traits show that when GDD reaches 773 （℃·d） andJingyan mini-2 reaches fruit stage. The fruit-setting rate is 7.7 fruits/ plant and high percentage of dry matter is distributed to fruits to form high yield. The yield of 100 mini-cucumber is 9.35kg higher than Ruiguang in autumn and 4.17kg higher in spring. High temperature is good for yield, so this two cultivar has higher yield in spring than in autumn.Jingyan mini-2 is different with Ruiguang-2 in morphological characteristics, development process , dry matter allocation and yield. So, it is necessary to regulate cultivation measure to face the characteristics of mini-cucumber： precocity fruiting, high yield, low temperature intolerance. Strengthen temperature, fertilizer and water management to maximize the yield advantage of mini-cucumber.