Department of Environmental Science, University of Kuopio, Kuopio, Finland.
J Agric Food Chem. 2009 Aug 26;57(16):7612-7. doi: 10.1021/jf9018917.
This study evaluates the use of human urine and wood ash as fertilizers for tomato cultivation in a greenhouse. Tomatoes were cultivated in pots and treated with 135 kg of N/ha applied as mineral fertilizer, urine + ash, urine only, and control (no fertilization). The urine fertilized plants produced equal amounts of tomato fruits as mineral fertilized plants and 4.2 times more fruits than nonfertilized plants. The levels of lycopene were similar in tomato fruits from all fertilization treatments, but the amount of soluble sugars was lower and Cl(-) was higher in urine + ash fertilized tomato fruits. The beta-carotene content was greater and the NO(3)(-) content was lower in urine fertilized tomato fruits. No enteric indicator microorganisms were detected in any tomato fruits. The results suggest that urine with/without wood ash can be used as a substitute for mineral fertilizer to increase the yields of tomato without posing any microbial or chemical risks.
本研究评估了在温室中使用人类尿液和草木灰作为番茄种植的肥料。番茄在盆中种植，并施以 135 公斤/公顷的矿物肥、尿液+草木灰、尿液和对照（不施肥）处理。与矿物施肥的植物相比，尿液施肥的植物产生了等量的番茄果实，而比未施肥的植物多产 4.2 倍。来自所有施肥处理的番茄果实中的番茄红素水平相似，但尿液+草木灰施肥的番茄果实中的可溶性糖含量较低，Cl(-)含量较高。尿液施肥的番茄果实中的β-胡萝卜素含量较高，NO(3)(-)含量较低。在任何番茄果实中均未检测到肠病指示微生物。研究结果表明，尿液与/或草木灰可替代矿物肥，在不产生任何微生物或化学风险的情况下，增加番茄的产量。
