Effect of Humic Fractions from Urban Wastes and Other More Evolved Organic Materials on Seed Germination

✍ Scribed by Ayuso, Miguel; Hernández, Teresa; García, Carlos

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 640 KB
• Volume: 72
• Category: Article
• ISSN: 0022-5142
• DOI: 10.1002/(sici)1097-0010(199612)72:4<461::aid-jsfa680>3.0.co;2-#

✦ Synopsis

The effect of different amounts of humic fractions obtained from urban wastes (sewage sludge and compost) on seed germination (barley, watercress and tobacco) has been compared with that of humic derived from more evolved organic materials (leonardite and peat) and a commercial humic acid fractions. Results demonstrated that the humic fractions from urban wastes had a more irregular effect on seed germination than those proceeding from more humified organic materials. Humic substances had a more positive effect on germination than humic acids, those effects depending on the nature of the original organic materials. The stability of the original organic materials (urban wastes or evolved organic materials) was a determinant factor of the behaviour of humic fractions on the germination process.