| 知識類型 | 期刊 |
| 標題 | Agronomic values of greenwaste biochar as a soil amendment |
| 作者 | K. Y. Chan, L. Van Zwieten, I. Meszaros , A. Downie and S. Joseph D |
| 名稱(期刊/節目) | Australian Journal of Soil Research |
| 期刊期數/節目集數 | 45(8) |
| 出版單位 | CSIRO PUBLISHING |
| 出版年月日 | 2007/12/7 |
| 原文摘要 | A pot trial was carried out to investigate the effect of biochar produced from greenwaste by pyrolysis on the yield of radish (Raphanus sativus var. Long Scarlet) and the soil quality of an Alfisol. Three rates of biochar (10, 50 and 100 t/ha) with and without additional nitrogen application (100 kg N/ha) were investigated. The soil used in the pot trial was a hardsetting Alfisol (Chromosol) (0–0.1 m) with a long history of cropping. In the absence of N fertiliser, application of biochar to the soil did not increase radish yield even at the highest rate of 100 t/ha. However, a significant biochar × nitrogen fertiliser interaction was observed, in that higher yield increases were observed with increasing rates of biochar application in the presence of N fertiliser, highlighting the role of biochar in improving N fertiliser use efficiency of the plant. For example, additional increase in DM of radish in the presence of N fertiliser varied from 95% in the nil biochar control to 266% in the 100 t/ha biochar-amended soils. A slight but significant reduction in dry matter production of radish was observed when biochar was applied at 10 t/ha but the cause is unclear and requires further investigation. Significant changes in soil quality including increases in pH, organic carbon, and exchangeable cations as well as reduction in tensile strength were observed at higher rates of biochar application (>50 t/ha). Particularly interesting are the improvements in soil physical properties of this hardsetting soil in terms of reduction in tensile strength and increases in field capacity. |
| 原文摘要簡述 | 本研究進行了一項盆栽試驗，以探討由熱裂解綠色廢棄物產生的生物炭對蘿蔔(Raphanus sativus var. Long Scarlet)產量和淋溶土土壤品質的影響。在此研究了有無額外施用氮(100 kg N/ha)的三種生物炭比率(10、50及100 t/ha)。盆栽試驗中使用的土壤為栽作歷史悠久的硬質淋溶土(磚紅壤) (0–0.1 m)。在缺氮的肥料中，即使在100 t/ha的高比率下施用生物炭於土壤也不會增加蘿蔔的收穫量。然而在氮肥存在的情況下，隨著生物炭施用量的增加，觀察到了生物炭與氮肥之間的顯著相互作用，從而提高了產量，這突顯了生物炭在提高植物氮肥使用效率方面的作用。舉例來說，在有氮肥的情況下，蘿蔔乾物質的額外增加從無生物炭控制的95%變化到100 t/ha生物炭改良土壤的266%。當以10 t / ha的比例施用生物炭時，發現蘿蔔乾物質的產量略有降低，但原因尚不清楚，需要進一步研究。 |
| 關鍵字 | charcoal, char, agrichar, soil strength, soil carbon sequestration, hardsetting soil, slow pyrolysis |
| 連結 | http://www.publish.csiro.au/sr/SR07109 |