Year: 1981
Type: article
Abstract: Four kinds of composts were made by heaping mixtures composed of sawdust, chicken excreta and one of sewege sludges from the paper manufacturing (PM), the seasoned preserve food processing (SP), the bean jam processing plants (BJ) and the other food industries (OF), and examined for their agronomic benefit by applying to cultivated fields. (1) When the sludge composts were applied to fields in which spinaches or radishes were grown, a good growth and yields were obtained; especially in the field with SP sludge compost, the plant growth was comparable to that of the field applied with a commercial fertilizer containing N, P and K. (2) The composts were also effective to give rise to the good growth and yields of onions and potatos, which were cultivated successively in the fields after harvesting spinaches or radishes. (3) The chemical properties of soils were examined after harvesting plants. The pH value was no significantly different among the four soils applied with the respective composts, but the EC, C/N and humus content were some-what higher in the soil applied with SP sludge compost than those of the other three. (4) As regards the succession of earthwarms in the four soils, some differences were noted. The number of the warms in the soils applied with PM or SP sludge compost was greater than that in the soils applied with BJ or OF sludge compost. It in the latter two, however, was considerablly great as compared with that of the non-applied soil. (5) When the composts were applied to young peach trees planted in pots, growth of sprouts and roots was favorably good, as compared with that of the non-applied pots after one year later. From these results, it was concluded that the composts made up with sewage sludges, sawdust and chicken excreta were useful for applying to cultivated fields as fertilizers or for amendment of soil.
Language: Japanese
Subfield: Soil Science
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W7146741702