The Effect of Nitrogen Fertilizer Use at Tea Yards on Water Quality of an Irrigation Reservoir.
The Effect of Nitrogen Fertilizer Use at Tea Yards on Water Quality of an Irrigation Reservoir.
复制标题
茶园施氮肥对灌溉水库水质的影响。
DOI：
10.2965/jswe.23.374
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
Tasuku Kato
中科院分区：
文献类型：
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作者：
H. Nakasone;Izumi Yamasita;H. Kuroda;Tasuku Kato
我们发现了一个特殊的灌溉水库，里面没有藻类、昆虫或鱼。因此，我们对一座灌溉水库的水质进行了调查，以找出没有生物的原因。作为调查结果，我们发现高硝酸盐浓度、高铝浓度和低pH值三个因素将影响该灌溉水库中生物的生命。在这三个因素中，最重要的一个因素是这个灌溉水库的低pH。灌溉水库的低PH值是由于茶园过度使用氮肥造成的。茶园长期施氮肥约1000 kg·ha-1·y-1。未被茶树吸收的残留氮肥渗入土壤，进入地下水。这导致该灌区土壤阳离子交换容量过大，铝浓度偏高。为了防止这种现象的发生，在根区下打瞌睡石灰和减少氮肥的使用可能是有效的。
We found a special irrigation reservoir in which there are no algae, insects, or fish. Therefore, we have surveyed the water quality of an irrigation reservoir to find the reason for no living creatures. As the results of the survey, we found three factors such as high nitrate concentration, high aluminum concentration, and low pH value which will affect the lives of creatures in this irrigation reservoir. Among these three factors, the most important one is low pH in this irrigation reservoir. This low pH of the irrigation reservoir is derived from the overuse of nitrogen fertilizer at tea yards. About 1,000kg · ha-1 · y-1 of nitrogen fertilizer has been used to the tea yards for a long time. The remained nitrogen fertilizer which was not taken up by tea crop infiltrates through soils and enters into the ground water. This causes an over the Cation Exchange Capacity of soil and high aluminum concentration of this irrigation reservoir. To prevent this phenomenon from occurring, dozing lime under the root zone and reducing use of nitrogen fertilizer might be effective.