N concentration of nutrient solution affects root morphology and growth parameters of pepper seedlings
The objective of this study was to assess the influence of different N concentrations of the nutrient solution to morphology and growth parameters of pepper seedlings during the nursery stage. For that purpose, graded seeds of a commercial pepper cultivar ('Rafaelo F1') were sown in polysterol trays, filled with peat (60 cm3 per each module), and kept in a growth chamber (24-26°C; 95% RH) until germination has started. After that the seedlings were transferred in a common unheated greenhouse till the end of the experiment. After the second true leave was established the plants were periodically irrigated with equal amounts of nutrient solutions (N, P 20 mg L‑1, K 120 mg L‑1) which contained different nitrogen (N) concentrations, respectively 50, 100, 150 and 200 mg L‑1. Fifteen and 25 days after the differentiated fertigation has started, an equal number of plants were randomly selected, and root morphology and growth parameters were estimated. It was found that increasing N concentration a progressive increase of plant dry matter and leaf area was observed. The plant grew faster, but the ratio of root dry matter to the whole plant dry matter was significantly reduced. The dry weight of the root system was increased by increasing N concentration in the nutrient solution, but the root system was less branched, and the total root length was significantly reduced.
Babaj, I., Sahiti, Z., Kaciu, S., Sallaku, G. and Balliu, A. (2021). N concentration of nutrient solution affects root morphology and growth parameters of pepper seedlings. Acta Hortic. 1320, 343-348
root length, dry matter, growth, relative growth rate, leaf area