Arsenic ‐ phosphorus interactions on corn1
作者:
L. W. Jacobs,
D. R. Keeney,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1970)
卷期:
Volume 1,
issue 2
页码: 85-93
ISSN:0010-3624
年代: 1970
DOI:10.1080/00103627009366245
出版商: Taylor & Francis Group
关键词: soils;Zea mays L;arsenic;phosphorus;phytotoxicity;pesticide residues
数据来源: Taylor
摘要:
Samples of two widely divergent soils, a Waupun silt loam and a Plainfield sand, deficient in P, were treated with 0, 20 or 80 ppm As and 0, 50, 100 or 300 ppm P in all possible combinations and cropped twice for 40 days to corn in the greenhouse. Arsenic had a much more pronounced toxicity to corn in the sand than on the silt loam. At the 80 ppm As level, P had little effect on As toxicity with the silt loam but enhanced toxicity with the sand and increasing rates of P increased As uptake by corn. At the 20 ppm As level, P did not affect As toxicity or uptake. Soil As extracted byNNH4OAc(pH 7.0) decreased with time but increased with increasing levels of applied P. Bray Pl extractable As was not greatly affected by applied P or time, and appeared to be a more suitable “available”; soil As test. From the results obtained, it would appear that P applications are not the solution to an As toxicity problem.
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