Differences in N uptake and fruit quality between organically and conventionally grown greenhouse tomatoes | Agronomy for Sustainable Development, Agronomy

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Table VI

Tomato quality index of tomato fruits of four cultivars grown in organic or conventional crop systems.

	Quality index^a
Crop systems
ORG	59.36 a
ORGWS	62.45 a
CONV	62.56 a
CONV-RWL	58.51 a
CONV-RWH	60.92 a
P value	0.2520

Cultivars
15	56.25 b
40	78.52 a
45	55.68 b
93	52.52 c
P value	< 0.0001

Quality index= ∑(C_S sample * K_X)/C_O

Crop systems were: organic system in soil with (ORG) or without straw (ORGWS), conventional system in rockwool with a high nutritive solution concentration (CONV-RWH), conventional system in rockwool with a low nutritive solution concentration (CONV-RWL), and conventional system in soil (CONV-S). The interaction between Cultivars and Crop systems was not significant and therefore, only the main effects were considered. For each parameter (cultivar and crop system), within each column, values followed by a similar letter are not significantly different according to Tukey test (P ≤ 0.05).