| Summary: | 碩士 === 國立臺灣大學 === 農業工程學系 === 82 === In Taiwan, irrigation water was contaminated by the large
amount of swine wastewater.Therefore, excess nitrogen from
swine waste water not only degenerated irrigation water
and soil properties but also reduced rice growth and yield.
This study used the farm field of Wan-Dan that was irrigated
by Tai-Tao and Yung-An channel in Ping-Ton as an
experimental area. We analyzed the variability of nitrogen
from soil samples with the different depth. We also measured
the effect of rice growth and yield by using different
concentrations of swine wastewater to irrigate soils
in the green house.Several conclusions were made as follows:
1.In Tai-tai and Yung-an area, both the values of EC
and concentration of nitrogen was show water quality
contaminated by swine wastewater. In addition,both EC and
nitrogen in groundwater was also contaminated. 2.In Tai-tao
and Yung-an area, EC of soil sample were decreased with depth,
which means that salt accumulated on soil surface. 3.In these
two soil, pH had a tendency to decrease, which mesns that
swine waterwaste acidified the soil. 4.The accumulation of
ammonium Tai-Tao area was more than in Yung-An area, which
means the mineralization was faster in coarse soil. 5.The
amount of nitrite in Tai-Tao soil was more than that in Yung-
An soil, which means that Tai-Tao soil was also better for
nitrification. 6.The accumulation of TKN in Yung-An soil was
more than that in Tai-Tao soil, which means that the
absorption of nitrogen in Yung-An was larger.
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