Table 2. Numbers of different sized and total tubers, biomass, tuber yield, and harvest index of potato plants under different treatment conditions of CO2 and temperature at the final harvest.
Treatment | No. tubers (plant-1) | Total no. tubers (plant-1) | Biomass (g DW plant-1) | Yield (g FW plant-1) | Harvest Index\ | |||||
---|---|---|---|---|---|---|---|---|---|---|
<30 g | 30–80 g | >80 g | Leaf | Stem | Tuber | Tuber | Marketable | |||
aCaT | 4.8a | 2.9b | 2.3b | 10.2a | 10.4b | 7.1b | 106.4b | 502b | 273b | 0.87ab |
eCaT | 5.2a | 3.9a | 2.4b | 11.5a | 9.8b | 6.2b | 110.3b | 527b | 269b | 0.89a |
aCeT | 2.0c | 2.8b | 1.9c | 6.4b | 7.6b | 6.0b | 76.9c | 342c | 195c | 0.84ab |
eCeT | 3.9b | 4.1a | 2.9a | 10.8a | 14.4a | 9.3a | 127.5a | 604a | 352a | 0.82b |
ANOVA | ||||||||||
CO2 | *** | ** | *** | *** | *** | * | *** | *** | *** | ns |
Temp | *** | ns | Ns | ** | ** | Ns | ** | * | Ns | ** |
CO2 × Temp | *** | ns | *** | ** | *** | *** | *** | *** | *** | ns |
Means followed by the same letters in each column are not significantly different at P < 0.05 according to Tukey’s test.
*Significant at the 0.05 probability level;
** Significant at the 0.01 probability level;
***Significant at the 0.001 probability level;
NS—not significant; Tuber size: <30 g Small, 30–80 g Medium, >80 g Large; Marketable: weight > 80 g; Harvest index: tuber dry weight / total dry weight; Temp: Temperature.