Abstract:

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-cucumber Jingyan mini-2, and compared the difference between Jingyan mini-2 cucumber and Ruiguang-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 of mini-2 but has a great effect on Ruiguang-2 leaf expansion. Yield traits show that when GDD reaches 773 ℃?d and Jingyan 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.