บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Direct, delayed and residual effects of applied wastewater from olive processing on nitrogen and phosphorus availability in the soil-plant system.

Gallardo-Lara, F.; Perez, J. D.;

Journal of Environmental Science and Health. Part B, Pesticides, Food Contaminants, and Agricultural Wastes Year: 1990 Vol: 25 Issue: 3 Pages: 379-394 Ref: 24 ref.

1990

บทคัดย่อ

Direct, delayed and residual effects of applied wastewater from olive processing on nitrogen and phosphorus availability in the soil-plant system.

Olive processing waste water was applied with nutrients to 2 litre pots of calcareous soil sown to barley, followed by rye grass (Lolium perenne) in a greenhouse experiment. Treatments consisted of a control (soil alone), control + NPKS, soil + 331 ml wastewater (VW1), VW1 + N, VW1 + P, VW1 + S, VW1 + NPS, soil + 500 ml wastewater (VW2), VW2 + N, VW2 + P, VW2 + S, VW2 + NPS. N and P levels in barley, 3 successive ryegrass harvests, and in soil following the last harvest, are given for each treatment. A first sowing with barley, and after fallowing, a second sowing with ryegrass demonstrated, respectively, the direct and delayed effects of the effluent on dry matter yield and the availability of N and P. The direct effect of olive wastewater, especially at high doses, was to reduce all parameters, whereas the opposite effect was seen over time. The combined application of N ameliorated the direct effects of wastewater application, and all mineral complements accentuated the delayed effects. The final postharvest analysis showed all treatments which contained wastewater to have residually raised total N and available P in soil.