盤固草生物炭的特性研究與對牧草生長的影響

本研究的目的為了解畜試所生產的盤固草生物炭（簡稱草炭）特性，以及對不同牧草生產及土壤上的影響，做為後續研究的參考。草炭是以不適用的廢乾草，經炭窯炭化而成（溫度介於450－550℃間，時間約5－7小時），炭製成率約20%。草炭的平均pH值為9.6、電導度（EC）為5.0ms/cm、碳含量為64.2%、氮含量為1.7%、磷含量為2.0%、鉀含量為3.8%、灰分為12.9%，碘值與亞甲藍值分別為469.8mg/g及15.0mg/g。將製成之盤固草炭分別施用於青割玉米、苜蓿及盤固草三種牧草的草地，結果顯示，牧草炭對當期作青割玉米（1kg/m^2）及苜蓿累積產量（2kg/m^2）都有促進生長的效果，但對盤固草則無反應；同時，不論牧草種類，施用草炭均顯著增加土壤有機質含量，顯示盤固草炭具有增加牧草地的碳蓄積效果。本研究結果可以做為農業廢棄物資源化利用與循環農業之參考。

關鍵字

生物炭；牧草；土壤改良；碳固定

並列摘要

The purpose of this study was to investigate the characteristics of pangolagrass biochar produced by Hengchun Branch, Livestock Research Institute, and to find its effects on different kinds of forage production and soil properties. The biochar was made from spoiled pangolagrass hay. The kiln temperature was about 450-500℃ and lasted for 5-7 hours. The biochar production rate was about 20%. The average value of pH was 9.6, electric conductivity (EC) 5.0 ms/cm, carbon content 64.2%, nitrogen content 1.7%, phosphorous content 2.0%, potassium content 3.8% and ash content 12.9%, respectively. The average iodine value and methylene blue value were 469.8 mg/g and 15.0 mg/g, respectively. Three kinds of forage production systems were tested in this study. Application of biochar could increase the dry matter yields of current cropped forage corn and increase the accumulated yield of alfalfa, but it had no effect on that of pangolagrass. By the way, the soil organic matters and carbon contents increased after applying biochar in all three forage production systems, which indicated carbon sink increased by these operations. The results of this study showed that spoiled hay was a good candidate material for biochar, and the biochar could be used to improve forage production, which might be a good model for recycling agricultural by-products.

並列關鍵字

Biochar ； Forage ； Soil amendment ； Carbon sequestration

國際替代計量

盤固草生物炭的特性研究與對牧草生長的影響

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