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- Title
Nutrient Solution Strength Does Not Interact with the Daily Light Integral to Affect Hydroponic Cilantro, Dill, and Parsley Growth and Tissue Mineral Nutrient Concentrations.
- Authors
Currey, Christopher J.; Walters, Kellie J.; Flax, Nicholas J.
- Abstract
Our objectives were to quantify the growth and tissue mineral nutrient concentrations of cilantro (Coriandrum sativum 'Santo'), dill (Anethum graveolens 'Fernleaf'), and parsley (Petroselinum crispum 'Giant of Italy') in response to nutrient solution electrical conductivity (EC) under low and high photosynthetic daily light integrals (DLI). Three-week old seedlings of cilantro, dill, and parsley were transplanted into nutrient-film technique hydroponic systems with one of five nutrient solution EC treatments (0.5, 1.0, 2.0, 3.0, or 4.0 dS·m−1) in greenhouses under a low (~7.0 mol·m−2·d−1) or high (~18.0 mol·m−2·d−1) DLI. The DLI, but not nutrient solution EC, affected culinary herb growth. For example, fresh mass increased by 21.0 (154%), 17.1 (241%), or 13.3 g (120%) for cilantro, dill, and parsley, respectively, for plants grown under high DLI compared to those grown under a low DLI; dry mass followed a similar trend. Tissue nutrient concentrations were generally affected by either DLI or EC. For those nutrients affected by DLI, concentrations increased with increasing DLI, except for potassium (K; all species) and manganese (Mn; dill). For those nutrients affected by EC, Ca and Mg decreased with increasing EC, while the remaining increased with increasing EC. When our tissue nutrient data are compared to recommended tissue concentrations, the vast majority of elements were either within or above recommended tissue ranges for cilantro, dill, and parsley. Our results demonstrate cilantro, dill, and parsley can be successfully grown across a range of EC, regardless of the light intensity of the growing environment.
- Subjects
ITALY; DILL; CORIANDER; PARSLEY; ELECTRIC conductivity; LIGHT intensity; PHOTOSYNTHETICALLY active radiation (PAR); ELECTRICAL conductivity measurement
- Publication
Agronomy, 2019, Vol 9, Issue 7, p389
- ISSN
2073-4395
- Publication type
Article
- DOI
10.3390/agronomy9070389