Fig. 4: Leaf temperature

Fig. 4: Leaf temperature.

Letters indicate significant differences (HSD, p ≤ 0,05).

4.1.5 Irrigation of tomatoes

The amount of applied water varied most of the time between 2 and 6 l/m2 (Fig. 5). By calculating the daily applied water rate per month (Fig. 6) it is getting obvious that all light treatments were watered equally.

E.C. and pH of irrigation water was fluctuating much (Fig. 7). The E.C. of applied water ranged most of the time between 3,5-5,0 and the pH between 5,5-6,5. The E.C. of runoff stayed most of the time between 4,0-7,0 and the pH between 5,5-8,0. The E.C. of the runoff seem to be lowest for “Hybrid high”.

The amount of runoff from applied irrigation fluctuated very much and varied most of the time between 20-60% runoff. It seems to be on average highest in “Hybrid high” (Fig. 8).