Effect of Nitrogen Form and Type of Polyethylene Film Covering Tunnel on Nutrient Content of Hydroponically Grown Sweet Pepper

Summary

Effect of Nitrogen Form and Type of Polyethylene Film Covering Tunnel on Nutrient Content of Hydroponically Grown Sweet Pepper The effect of nitrogen form (nitrate or nitrate-ammonia-amide) and a type of polyethylene film (two types, differing light transmission, light dispersion and PAR) covering a tunnel on the content of macroelements in the leaves of sweet pepper being in different stages of growth were studied. The plants were grown in rockwool slabs, using a drip fertigation system without recirculation. In each part of the tunnel there were two sets of cultivation gutters independently supplied with nutrient solution containing different forms of nitrogen: nitrate (100% N-NO 3), nitrate-ammonia-amide (50% N-NO 3, 13% N-NH 4, 37% N-NH 2). Dry matter and mineral composition were deter