Altered Plant Structure and Greater Yield of Cucumber Grown at Elevated Co2 in a Semi-Closed Greenhouse

Elevated and super‐elevated CO2 differ in their interactive effects with nitrogen availability on fruit yield and quality of cucumber

“…Elevated CO 2 by itself promoted fruit yield by both increased total plant biomass and greater biomass allocation to fruits (Tables and , and Fig. S1), which is confirmed by several studies . High N further enhances the yield promotion by eCO 2 mainly due to two reasons.…”

“…S1), which is confirmed by several studies. 8,9 High N further enhances the yield promotion by eCO 2 mainly due to two reasons. First, relative to low N, high N could reduce the eCO 2 -stimulated carbon wileyonlinelibrary.com/jsfa allocation to roots, because the greater N availability fulfilled the plant N demand as indicated by no more biomass allocation to roots and no increased root-to-shoot ratio under eCO 2 (Table 3).…”

“…The yield increase of wheat under eCO 2 is largely attributed to the increased total plant productivity rather than harvest index . By contrast, it appears that eCO 2 can promote the yield of cucumber via both increased plant productivity and biomass allocation to fruits . However, super‐elevated CO 2 (defined as >1000 µmol mol −1 here) decreases carbon fixation rates of cucumber and yield of vegetables compared with commonly recommended CO 2 , resulting in the downregulation of photosynthesis or photosynthetic acclimation …”

“…7 By contrast, it appears that eCO 2 can promote the yield of cucumber via both increased plant productivity and biomass allocation to fruits. 8,9 However, super-elevated CO 2 (defined as >1000 μmol mol −1 here) decreases carbon fixation rates of cucumber 10 and yield of vegetables 5 compared with commonly recommended CO 2 , resulting in the downregulation of photosynthesis or photosynthetic acclimation. 5 High nitrogen (N) availability would further increase eCO 2 stimulation on plant productivity and yield.…”

Effects of HPS and LED lighting on cucumber leaf photosynthesis, light quality penetration and temperature in the canopy, plant morphology and yield

“…Hernandez and Kubota (2015) reached the same conclusion regarding leaf number reduction, but did not measure the leaf temperature. In a semi-closed greenhouse experiment during summer the appearance of the cucumber canopy was similar to that in the LED-LED treatment except the rate of abortion of fruit initials (Luomala et al 2008); the yield in a semi-closed greenhouse with high CO 2 was better than that in a conventional greenhouse.…”