PDF(Pubmed)
Abstract：
Mechanized biochar field application remains challenging due to biochar\'s poor flowability and bulk density. Granulation of biochar with fertilizer provides a product ready for application with well-established machinery. However, it\'s unknown whether granulated biochar-based fertilizers (gBBF) are as effective as co-application of non-granulated biochar with fertilizer. Here, we compared a gBBF with a mineral compound fertilizer (control), and with a non-granulated biochar that was co-applied at a rate of 1.1 t ha-1 with the fertilizer in a white cabbage greenhouse pot trial. Half the pots received heavy rain simulation treatments to investigate nutrient leaching. Crop yields were not significantly increased by biochar without leaching compared to the control. With leaching, cabbage yield increased with gBBF and biochar-co-application by 14% (p > 0.05) and 34% (p < 0.05), respectively. Nitrogen leaching was reduced by 26-35% with both biochar amendments. Biochar significantly reduced potassium, magnesium, and sulfur leaching. Most nitrogen associated with gBBF was released during the trial and the granulated biochar regained its microporosity. Enriching fertilizers with biochar by granulation or co-application can improve crop yields and decrease nutrient leaching. While the gBBF yielded less biomass compared to biochar co-application, improved mechanized field application after granulation could facilitate the implementation of biochar application in agriculture.
摘要：
由于生物炭的流动性和堆积密度差，机械化生物炭的现场应用仍然具有挑战性。生物炭与肥料的造粒提供了一种易于使用完善的机械应用的产品。然而,目前尚不清楚颗粒状生物炭基肥料（gBBF）是否与非颗粒状生物炭与肥料共同施用一样有效。这里,我们将gBBF与矿物复合肥(对照)进行了比较，并在白菜温室盆栽试验中以1.1tha-1的比例与肥料共同施用非颗粒状生物炭。一半的花盆接受了大雨模拟处理，以研究养分浸出。与对照相比，没有浸出的生物炭没有显着提高作物产量。随着浸出，gBBF和生物炭共同施用使白菜产量增加了14％（p>0.05）和34％（p<0.05），分别。两种生物炭改良剂的氮浸出均减少了26-35％。生物炭显着减少钾，镁，和硫浸出。在试验过程中释放了与gBBF相关的大多数氮，并且颗粒状生物炭恢复了其微孔性。通过造粒或共同施用用生物炭富集肥料可以提高作物产量并减少养分浸出。虽然与生物炭共同施用相比，gBBF产生的生物量较少，造粒后改进的机械化田间应用可以促进生物炭在农业中的应用。
