長期施用養豬廢水對水稻生產與土壤性質之影響
Other Title
Effects of Long-Term Application of Pig Wastewater on Paddy Rice Production and Soil Properties
Journal
台灣農業研究
Journal Volume
74
Journal Issue
3
Start Page
303
End Page
316
ISSN
2790-086X
Date Issued
2025-09-08
Author(s)
Abstract
我國自 2011 年起開放申請畜牧廢水農地再利用，但尚未知長期施用下對作物生產與土壤環境的影響。本研究經過 19 年 (2004–2023 年) 長期監測結果，比較施用等量氮、磷、鉀肥分之化肥與養豬廢水對農地與產量之影響，顯示農地長期施灌養豬廢水對土壤 pH 與電導度 (electrical conductivity; EC) 的變化及作物產量沒有顯著差異，但土壤有機質含量會逐漸增加。廢水中銅的主要累積在土壤中，相較試驗前約增加 6 mg kg-1， 鋅的累積則在稻稈中。依質量平衡原則，以食用作物農地土壤污染監測標準值之 85% 為上限，計算土地使用年限，顯示若畜牧廢水中氮/銅與氮/鋅之比例超過 180 與 360，則可使土地使用年限超過 100 年以上，但仍建議藉由減少飼料中銅鋅的添加，以延長可施用於農地之年限。經由健康危害商數評估結果顯示，食用經長期施灌養豬廢水造成銅、鋅累積之稻穀，不致對人體造成危害。
Livestock wastewater for farmland application has been permitted in Taiwan since 2011. How-ever, concerns remain regarding the potential accumulation of heavy metals in the soil. This study presents findings from a 19-year monitoring period (2004–2023), comparing the effects of applying equivalent amounts of nitrogen, phosphorus, and potassium through chemical fertilizers and swine wastewater. The results showed that long-term irrigation with pig wastewater had little effect on soil pH and electrical conductivity (EC), but it gradually increased the soil organic matter content. Copper from the wastewater accumulated in the soil, with an increase of approximately 6 mg kg-1 compared to pre-treatment levels, whereas zinc primarily accumulated in rice straw. Based on a mass balance ap-proach and applying 85% of Taiwan’s soil contamination monitoring standards for food crop land as the upper threshold, the estimated safe land use duration can exceed 100 years if the N/Cu and N/Zn ratios in the wastewater are above 180 and 360, respectively. Moreover, reducing the copper and zinc input at the source- namely through feed formulation- can further prolong the period during which livestock wastewater can be safely applied to farmland.
Subjects
銅
鋅
農地再利用
水稻
Copper
Zinc
Farmland reuse
Oryza sativa
Publisher
農業部農業試驗所
Type
journal article
File(s)![Thumbnail Image]()
Loading...
Name
74-3-8.pdf
Size
3.6 MB
Format
Adobe PDF
Checksum
(MD5):772072ffb143b5cdfd64a605840001e8