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Full
Length Research Paper
Adequate human urine application pattern for agriculture
Moustapha Sene*1, Nowaki Hijikata2,
Ken Ushijima3, Naoyuki Funamizu4
1/2/3/4Department
of Environmental Engineering, Hokkaido University, Kita-13,
Nishi-8, Kita-ku, Sapporo-shi, 060-8628, Japan
*Corresponding
Author E-mail:
moustapha.sene@eng.hokudai.ac.jp; Tel: +81 -706-6272
Received 30
November, 2011; Accepted 10 January, 2012
The objective of this study was to evaluate when and how
often human urine should be applied in soil as fertilizer
solution. Thus, pot test using spinach and synthetic urine
was conducted in greenhouse. Seven treatments, those apply
same amount of urine in different pattern and control (total
8 cases) were set to know adequate urine application way.
Plant
height at 35 cultivation days
and fresh and dry weight of plant after harvest
were significantly lower in 100% urine applied in one time
before seedling (a) and control (h) than no urine applied
before seedling and then every 2 days application after
outbreak of plants (g).
Moreover, phosphorus level content in treatment (g) (1.6±0.2
mg/g plant DW) was statistically higher than treatment (a)
and control (h), both same level (0.5mg/g plant DW).The N/P
ratio in (a) (95.2±24.7) was significantly different than
(g) (28.4±3.5) .However, in all treatments was observed N/P
>16, which means phosphorus limitation. Therefore one
possible reason for the low growth in (a) might be the
availability of phosphorus. Besides, leached
nitrogen
in (a)
(38.3 %)
was
higher than others
treatments. Hence another possible reason might be leached
nitrogen.
Ours results shows clearly that urine
application at one time before seedling is not effective for
plant growth. Furthermore urine application at frequent
intervals might be a better way to promote plant growth.
Keywords: Human urine, pattern, fertilizer effect,
Spinacea oleracea.
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