Effect of sodium in the nutrient medium on the incidence of potassium deficiency symptoms in tomato plants

Besford, R.T.

Plant and Soil 50(2): 427-432

1978


ISSN/ISBN: 0032-079X
DOI: 10.1007/bf02107191
Accession: 005270173

Download citation:  
Text
  |  
BibTeX
  |  
RIS

Article/Abstract emailed within 0-6 h
Payments are secure & encrypted
Powered by Stripe
Powered by PayPal

Abstract
Tomato plants (Lycopersicon esculentum cv. Amberley Cross) were grown in sand culture and were fed with 4 concentrations of KNO3 in combination with 2 levels of NaNO3. After 6 wk the plants were scored for the presence and absence of a symptom of K deficiency, namely, marginal chlorosis and/or necrosis in the young, fully-expanded leaves. These leaves were also analyzed for K and Na. Marginal chlorosis and/or necrosis occurred in plants given a nutrient solution containing 0.5 meq K/l or less and supplied with either of the NaNO3 levels. However, the symptoms occurred more frequently in plants receiving the lower level of NaNO3. The laminae on plants receiving the lower concentration of NaNO3 had a 50% incidence of chlorosis and/or necrosis when the tissue K content was 0.74% of the dry weight, while those laminae on plants receiving the high level did not show a 50% incidence until their K fell to 0.64% of the dry weight.

Effect of sodium in the nutrient medium on the incidence of potassium deficiency symptoms in tomato plants