施灌經厭氣發酵豬糞尿廢水對狼尾草生長及牧草地土壤與滲漏水性質之影響

Effects of Irritation of Pig Waste Water with Anaerobic Fermentation on the Growth of Napiergrass and Properties of Pasture Soil and Leaching Water

10.30061/CEB.200906.0004

盧啟信(Chi-Hsin Lu)；許福星(Fu-Hsing Hsu)

狼尾草 ； 豬糞尿廢水 ； 牧草產量 ； 土壤 ； 滲漏水 ； Napiergrass ； Pig waste water ； Forage yield ； Soil ； Leaching water

作物、環境與生物資訊

6卷2期（2009 / 06 / 01）

113 - 123

繁體中文

本試驗的目的旨在探討經厭氣發酵後之豬糞尿廢水施灌於狼尾草地，對牧草產量、品質及土壤與土層滲漏水之影響。本試驗於狼尾草臺畜草二號牧草地，每年灌施相當每公頃400、800、1, 200及1, 600 kg氮素經厭氣處理之豬糞尿廢水。結果顯示，1m深之滲漏水全氮、銨態氮、硝酸態氮及溶磷等含量，隨著廢水施灌量的增加而有提高的現象。試驗區表土之有機質、全氮及導電度等均顯著增加，而有效性磷、交換性鉀、鈣及鎂等含量及pH值有增加的趨勢，但未達顯著差異。狼尾草高度及鮮、乾草產量均隨著廢水施用量增加而提高，施用廢水處理之產量均較施用化學肥料高。灌施廢水處理之植體中粗蛋白質、銨態氮及硝酸態氮等含量隨著廢水施用量的增加而提高。寒冷季節如施用相當1, 200 kg氮素以上之畜牧廢水，植體中無機氮的含量可能超過1, 000 ppm，對動物健康不利，夏季則無此顧慮。由上述結果可知，厭氣發酵後豬糞尿廢水施灌於狼尾草地，有助於提高狼尾草產量及改善土壤地力。但若長期大量施灌時，則必須長期監測植體中無機氮的含量及地下水之品質。

The objectives of this study were to study theeffects of irrigation of pig waste water withanaerobic fermentation on forage yield andquality of napiergrass (Pennisetum purpurem) andthe properties of soil and leaching water. Thequantity of waste water irrigated were equivalentto 400, 800, 1, 200 and 1, 600 kg N ha-1 yr-1, respectively. The treatments increased theconcentrations of total N, NH4+, NO3- anddissolved P in leaching water collected at 1 mdepth. The contents of organic matter, total N andelectric conductivity in surface soil increasedsignificantly with the waste water treatments. However, no significant difference was observedin soil pH and the contents of available P andexchangeable K, Ca and Mg in soil treated withdifferent amounts of waste water. The forageyield and the contents of crude protein, ammonium nitrogen and nitrate nitrogen in theplants were increased by the irrigation treatments. When irrigated with the waste water equivalentto 1, 200 kg N ha-1 yr-1, he content of inorganic Nin plants grown in cold season, but not in hotsummer, exceeded 1,000 ppm. Based on theseresults, application of pig waste water withanaerobic fermentation in napiergrass pastureincreased forage yield and improved soil fertility. However, the content of inorganic N innapiergrass and the quality of leaching waterfrom soil layers should be monitored afterlong-term irrigation with pig waste water.