Abstract
An effective method obtained from compost water extracts was to incubate compost solution at 60°C in water bath for about 3 hrs and to centrifuge to get supernatant as final compost extract. Pollen tubes of Solanum melongena L. increased their length with the increase of dilution rates of compost extracts enriched to their culture media. Compared with matured composts, contents of ammonia-N and volatile organic acids of un-matured compost were high. Extracts of un-matured compost depressed the elongation pollen tubes of both Solanum melongena L. and Stewartia pseudo-Camellia Maxim. as well as the rates of germination and elongation of roots of Brassica campestrics L.
