Increase of leaf tipburn in chervil and lettuce by restricting volume of growing medium

Figures & data

Figure 1.  Total number of leaves, the number of fresh and injured leaves per plant of chervil depending on the sizes of rock wool cubes. Y – Numbers of leaves. X – the size of rock wool cube (4×2.8×2.8 cm = 31 cm³, 4×4×4 cm = 64 cm³, 4×5.8×5.8 cm = 135 cm³); (fresh leaves p=0.015, injured leaves p<0.001).

Table I. The weight (g) per plant of chervil according to the sizes of rock wool cubes (a. 4×2.8×2.8 cm = 31 cm³, b. 4×4×4 cm = 64 cm³, c. 4×5.8×5.8 cm = 135 cm³).

Size of rock wool cubes (cm^3)	Weight (g)
a. 4×2.8×2.8 = 31	11.2 c
b. 4×4×4 = 64	13.4 b
c. 4×5.8×5.8 = 135	15.1 a
Statistical differences	p=0.032

Figure 2.  Calcium content (in young and old leaves g kg⁻¹ dry weight) in chervil plants according to the sizes of rock wool cubes. Y – Ca content in leaves (g kg⁻¹ dry weight). X – the size of rock wool cube (a. 4×2.8×2.8 cm = 31 cm³, b. 4×4×4 cm = 64 cm³, c. 4×5.8×5.8 cm = 135 cm³); (young leaves p=0.041, old leaves p=0.028).

Table II. The height (cm), the fresh weight (g), total number of leaves, the number of fresh and injured leaves per plant of leaf lettuce depending on the capacities of peat pots (8 cm pots with capacity of 0.25 L; 12 cm pots with capacity of 0.6 L).

			Number of leaves
Pot size (L)	Height (cm)	Fresh weight (g)	Total	Fresh	Tipburned
0.25	14.25 b	30.66 b	22.75 b	11.37 b	11.38 a
0.6	18.63 a	39.66 a	24.5 a	15.12 a	9.38 b
Statistical differences	p=0.027	p<0.001	p=0.042	p=0.027	p=0.034

Table III. The content of dry matter (%), chlorophyll (mg g⁻¹ fresh weight) and calcium (in young leaves g kg ⁻¹ dry weight) in leaf lettuce plants according to the capacities of peat pots (8 cm pots with capacity of 0.25 L; 12 cm pots with capacity of 0.6 L).

Pot size (L)	Content of dry matter (%)	Content of chlorophyll (mg g^−1 fresh weight)	Content of calcium (g kg ^−1 dry weight)
0.25	9.45	4.24	0.98
0.6	8.48	4.46	1.05
Statistical differences	p=0.595	p<0.001	p=0.013