Response of cassava, sunflower, and maize to potassium concentration in solution I. Growth and plant potassium concentration

Spear S.N., Asher C.J. and Edwards D.G. (1978) Response of cassava, sunflower, and maize to potassium concentration in solution I. Growth and plant potassium concentration. Field Crops Research, 1 C: 347-361. doi:10.1016/0378-4290(78)90036-9


Author Spear S.N.
Asher C.J.
Edwards D.G.
Title Response of cassava, sunflower, and maize to potassium concentration in solution I. Growth and plant potassium concentration
Journal name Field Crops Research   Check publisher's open access policy
ISSN 0378-4290
Publication date 1978-01-01
Sub-type Article (original research)
DOI 10.1016/0378-4290(78)90036-9
Open Access Status Not yet assessed
Volume 1
Issue C
Start page 347
End page 361
Total pages 15
Subject 1102 Cardiovascular Medicine and Haematology
1110 Nursing
Abstract Twelve cultivars of cassava and one cultivar each of sunflower and maize were grown for 27 days at eight constant solution potassium concentrations ranging from 0.5 to 8024 μM. All species and cultivars required a minimum solution concentration of 2 to 6 μM K to produce maximum yield. At solution potassium concentrations greater than 122 μM the yield of most cassava cultivars declined and at 8024 μM K all cultivars displayed magnesium deficiency symptoms. A limited variation among species and cultivars was observed in the minimum tissue concentration necessary for healthy growth. Large differences in dry matter percentage existed among species, plant parts and potassium treatments. Because of these differences, trends in potassium concentration expressed on a dry weight basis in some instances did not accurately reflect trends in potassium concentration in the fresh tissue. Although all three species produced maximum dry matter yield at similar solution potassium concentrations, at suboptimal concentrations cassava regulated its growth more successfully in relation to potassium supply than did sunflower or maize. At 0.5 μM K cassava continued to grow slowly with less reduction in relative yield, less pronounced deficiency symptoms and a smaller gradient in tissue potassium concentrations from older to younger leaves than the other species. Continued slow growth of cassava at low solution potassium concentrations was aided by greater increase in the relative size of the root system.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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