Growth and Carotenoid Contents of Intercropped Vegetables in Building-Integrated Urban Agriculture

Table 3

Plant growth parameters of lettuce (Lactuca savita) and chicory (Cichorium intybus) according to seed mixture ratio in LED plant growth chamber at 25 days after sowing.

Treatments^z	Number of leaves^y	Leaf shape index^x	Chlorophyll contents (SPAD-value)	Fresh weight (g)
Lettuce
L alone	7.1 ± 0.38a	4.1 ± 0.19a	17.8 ± 1.01bc	1.50 ± 0.14a
L1C1	6.7 ± 0.52a	2.2 ± 0.11c	17.1 ± 1.55bc	1.32 ± 0.26a
L1C2	7.9 ± 0.39a	2.8 ± 0.15b	14.8 ± 1.03c	2.08 ± 0.35a
L1C3	6.5 ± 0.26a	2.5 ± 0.10bc	22.8 ± 0.61a	2.26 ± 0.56a
L2C1	7.5 ± 0.33a	2.4 ± 0.08bc	20.2 ± 1.28ab	2.38 ± 0.21a
L3C1	7.3 ± 0.37a	3.9 ± 0.25a	17.9 ± 1.00bc	1.34 ± 0.23a
Chicory
C alone	5.8 ± 1.13a	3.2 ± 0.19b	28.8 ± 2.97a	0.45 ± 0.17a
L1C1	4.3 ± 0.47ab	2.8 ± 0.19b	26.2 ± 1.04a	0.11 ± 0.02b
L1C2	5.5 ± 0.34a	2.5 ± 0.14b	25.7 ± 0.90a	0.23 ± 0.02a
L1C3	5.1 ± 0.41a	3.3 ± 0.19b	25.1 ± 1.70a	0.20 ± 0.03a
L2C1	4.6 ± 0.40a	2.5 ± 0.13b	25.7 ± 1.00a	0.11 ± 0.02b
L3C1	4.7 ± 0.24a	4.5 ± 0.78a	21.2 ± 1.37b	0.14 ± 0.02ab

Means ± standard error within column followed by the same letter are not significantly different. L alone, lettuce 40 seeds; C1L1, chicory 20 + lettuce 20; C1L2, chicory 13 + lettuce 27; C1L3, chicory 10 + lettuce 30; C2L1, chicory 27 + lettuce 13; C3L1, chicory 30 + lettuce 10; C alone, chicory 40 seeds. Data are means ± SE, the same letters are not significantly different within the same column according to Duncan’s multiple range test at (n = 9). Leaf shape index is leaf length/leaf width.