Nutritional requirements and interactions ofKhaya senegalensison tropical red and yellow earths
作者:
S.J. Rance,
D.M. Cameron,
E.R. Williams,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1983)
卷期:
Volume 14,
issue 2
页码: 167-183
ISSN:0010-3624
年代: 1983
DOI:10.1080/00103628309367353
出版商: Taylor & Francis Group
关键词: Foliar levels;glasshouse studies;Khaya senegalensis;N P K S Zn;nutrient interactions;Red and Yellow Earths
数据来源: Taylor
摘要:
Factorial experiments with the treatments N, P, K, and a minor and trace element treatment (T) were carried out with African mahogany (Khaya senegalensis) on two soils in the glasshouse. The best growth was on the N+P+T treatments; if any one element was omitted growth was greatly reduced. A second experiment showed that of the elements in the T treatment, S gave a growth response while Ca, Mg, and B did not. (Zn, Cu and Mo were not tested but tip die‐back and chlorotic leaves suggested that Zn was required.) Applications of N, P, K, and S increased the corresponding foliar levels but in the treatments which showed the best growth response the foliar levels were lower than those when one of the elements was omitted. It is suggested that foliar nutrient levels higher than those occurring in healthy trees may indicate that another nutrient is limiting growth. For instance foliar levels greater than about 0.12% P, 0.7% K and 0.13% S may indicate that the supply of P, K and S respectively is adequate but another element (such as one of the trace elements) is deficient.
点击下载:
PDF (600KB)
返 回