Department of Environmental Science, University of Kuopio, PO Box 1627, FI-70211 Kuopio, Finland.
J Agric Food Chem. 2010 Feb 10;58(3):2034-9. doi: 10.1021/jf9029157.
The objective of this study was to evaluate the effect of human urine and wood ash fertilization on the yield and quality of red beet by measuring the microbial, nutrient, and antioxidant (betanin) content of the roots. Red beets were fertilized with 133 kg of N/ha as mineral fertilizer, urine and ash, and only urine with no fertilizer as a control. The mineral-fertilized plants and urine- and ash-fertilized plants also received 89 kg of P/ha. Urine and ash and only urine fertilizer produced 1720 and 656 kg/ha more root biomass, respectively, versus what was obtained from the mineral fertilizer. Few fecal coliforms and coliphage were detected in mineral-fertilized and urine- and ash-fertilized red beet roots. The protein and betanin contents in red beet roots were similar in all treatments. In conclusion, this study revealed that urine with or without ash can increase the yield of red beet and furthermore the microbial quality and chemical quality were similar to the situation in mineral-fertilized products.
本研究旨在通过测量根的微生物、养分和抗氧化剂（甜菜红素）含量，评估人尿和草木灰施肥对红甜菜产量和品质的影响。红甜菜施以 133 公斤/公顷的矿物肥、尿液和草木灰，以及没有肥料的尿液作为对照。施矿物肥的植物以及施尿液和草木灰的植物还施以 89 公斤/公顷的磷。与矿物肥相比，尿液和草木灰以及仅尿液肥料分别产生了 1720 公斤/公顷和 656 公斤/公顷更多的根生物量。在矿物肥和尿液和草木灰施肥的红甜菜根中很少检测到粪便大肠菌群和噬菌体。红甜菜根中的蛋白质和甜菜红素含量在所有处理中相似。总之，本研究表明，尿液无论是否与草木灰混合都可以增加红甜菜的产量，此外，微生物质量和化学质量与矿物肥料产品相似。
