Table 2.

Experimental design of the applied N fertilisation in each N treatment with given volumes (mL) and respective amounts (mg) of NO₃ and NH₄.

Fertilisation amounts of N treatments	0 x N	2 x N	4 x N	8 x N	16 x N	32 x N
NO3: mL          mg	0 0	2 60	4 120	8 240	16 480	32 960
NH4: mL          mg	0 0	2 20	4 40	8 80	16 160	32 320

The amounts were given twice a week and in a 1:1 molar ratio.