Iron and nitrogen interactions in groundnut nutrition1
作者:
ZakiaI. Ali,
E. M. Abdel Malik,
H. M. Babiker,
V. M. Ramraj,
A. Sultana,
C. Johansen,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1998)
卷期:
Volume 29,
issue 17-18
页码: 2619-2630
ISSN:0010-3624
年代: 1998
DOI:10.1080/00103629809370138
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A pot experiment was conducted to estimate the levels of iron (Fe) needed to correct Fe‐deficiency chlorosis in groundnut grown in an alkaline soil and to study Fe x nitrogen (N) interactions in soil and plant and their associated effects on growth and yield. Four levels of Fe (0, 2.5, 10, and 25 mg Fe kg‐1soil as Fe‐EDDHA) and two levels of N(0 and 100 mg N kg‐1soil as NH4NO3) were applied factorially in a completely randomized block design. Higher rates of 10 and 25 mg Fe kg‐1caused a significant reduction in leaf area and aerial biomass accumulation irrespective of N treatment. The Fe x N interaction was significant for all of these parameters. Specific leaf area increased at higher levels of Fe application. Higher Fe levels induced symptoms suggestive of manganese (Mn) deficiency. This diagnosis was supported by decreasing concentration of Mn in leaf blades with increasing Fe levels. By contrast concentrations of most other elements in leaf blades increased with increasing levels of Fe application, suggestive of plant growth but not uptake of other elements being reduced by Mn deficiency.
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