Safaei Khorram Mahdi, Fatemi Akram, Khan Md Asaduzzaman, Kiefer Rudolf, Jafarnia Sasan
Department of Environmental Science, Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
Department of Soil Science, Razi University, Kermanshah, Iran.
J Sci Food Agric. 2018 Apr;98(6):2080-2088. doi: 10.1002/jsfa.8689. Epub 2017 Oct 17.
Biochar amendment is a promising tool to improve the soil quality and, consequently, higher crop yield has received more attention during last decades. The positive effects of biochar have been attracting more attention especially in the areas with low precipitation rates, such as the Middle East, due to low soil organic carbon content, higher drought intensity, and increasing demands for food production. However, biochar can lead to lower herbicide efficacy, resulting in higher consumption of herbicides. In this study, the impact of two biochars on soil properties, plant growth, and fomesafen efficacy under rain-fed condition was investigated.
Biochar amendment at the rate of 5 t ha improved soil quality and plant growth by 40-200% and 46-57%, respectively, compared to the control. The increase of biochar application rate from 5 t ha to 15 t ha showed small additional positive effects on soil and lentil as the tested crop plant, whereas the growth of weeds elevated by 200% in this case.
Albeit biochar application could be an effective way to improve the soil fertility, the potential risk of weed outbreak in the long term should be evaluated carefully before the use of biochar amendment at field scale. © 2017 Society of Chemical Industry.
生物炭改良是改善土壤质量的一种有前景的方法，因此，在过去几十年中，提高作物产量受到了更多关注。生物炭的积极作用尤其在降水率低的地区受到更多关注，比如中东地区，因为该地区土壤有机碳含量低、干旱强度高且粮食生产需求不断增加。然而，生物炭会导致除草剂效果降低，从而增加除草剂的消耗量。在本研究中，调查了两种生物炭在雨养条件下对土壤性质、植物生长和乙氧氟草醚药效的影响。
与对照相比，以5吨/公顷的速率施用生物炭分别使土壤质量和植物生长提高了40% - 200%和46% - 57%。将生物炭施用量从5吨/公顷增加到15吨/公顷对土壤和作为受试作物的小扁豆显示出较小的额外积极影响，而在这种情况下杂草生长提高了200%。
尽管施用生物炭可能是提高土壤肥力的有效方法，但在田间规模使用生物炭改良之前，应仔细评估长期杂草爆发的潜在风险。© 2017化学工业协会。
