Response ofHibiscus Rosa‐SinensisL. to varying levels of potassium fertilization: Growth, gas exchange and mineral element concentration
| Autor: | Fred T. Davies, Jonathan N. Egilla |
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| Rok vydání: | 1995 |
| Předmět: | |
| Zdroj: | Journal of Plant Nutrition. 18:1765-1783 |
| ISSN: | 1532-4087 0190-4167 |
| DOI: | 10.1080/01904169509365022 |
| Popis: | Little is known about the effect of varying levels of potassium (K) on the mineral element concentration, growth, and gas exchange, characteristics of woody ornamental plants. The commercially important woody ornamental species Hibiscus rosa‐sinensis L. cv. Leprechaun was evaluated for K response in a series of three experiments with full strength Hoagland's nutrient solution, which supplied 0 to 10 mM K. Plants grown with 4 mM K in nutrient solution (2.4% leaf tissue K) had the greatest shoot growth and root extension. Gas exchange rates (net photosynthesis, transpiration, and stomatal conductance) were also highest at 4 mM K compared to the control (0 mM K /0.6% leaf tissue K), 0.2, 2.0 and 10 mM K treatments. The application of 4 mM K increased net photosynthesis and tranpiration by 2.1 fold and stomatal conductance by 4.5 fold over 0 mM K controls. Increasing K in nutrient solution correlated positively with tissue K, manganese (Mn), and zinc (Zn), but negatively with nitrogen (N), phosphorus... |
| Databáze: | OpenAIRE |
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