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Positive Effect of Biochar Derived from Argan Waste on Soil Nutrients and Growth of Three Plants

Bouqbis Laila, Daoud Salma, Harrouni Moulay Cherif

Journal of Ecological Engineering

2021

Vol. 22, nr 7

28--34

The lack of organic matter content in deteriorated soils in drought stricken areas is a serious problem for vegetation cover. The use of organic amendments like biochar and compost to agricultural soils could be a good remedy for poor soil, water deficiency and plants growth. The comparative analysis of the effects of biochar produced from argan shells, compost and their mixture on the growth of quinoa (Chenopodium quinoa), sugar beet (Beta vulgaris) and alfalfa (Medicago sativa) was the main objective of this research. It was assumed that the addition of biochar mixed with compost could enhance soil fertility and then improve crop productivity of plants. For this purpose, three treatments (2%, 4% and 6%) of biochar (B), compost (C) and biochar–compost (B–C) mixture were applied to soil. The samples for different treatments were collected, incubated and then analyzed. In order to evaluate the plant growth, the greenhouse experiments were conducted for three months in the pots filled with untreated and treated soils. The results showed that the addition of biochar and compost to soil increased pH, electrical conductivity, exchangeable cations, total nitrogen, phosphorus, total organic matter and cation exchange capacity. A significant improvement of the biomass of plants has been observed when applying a mixture of biochar and compost at 6% for quinoa and sugar beet and at 4% for alfalfa. According to the obtained results, mixing argan biochar with compost has a positive impact on soil nutrients and growth of plants.

Role of the polymer degradation processes in environmental pollution and waste treatment

Vasile C.

Polimery

2002

T. 47, nr 7-8

517-522

The effect of various processes of environmental degradation of polymers (under atmospheric conditions, in water, soil, living organisms) on the pollution of the environment has been characterized. Activities concerning utilization of plastics wastes have been described. Some problems concerning the use of photo- and biodegradable polymers have been discussed. The results of author's research works on the course of degradation of poly-olefins (PE, i-PP) or epoxy resin (ER) with addition of various amounts of lignin modified with epoxy groups are presented as well as the effect of such blends on the plants growth. Except the positive influence on vegetative mass also significant detrimental effects occurring during blossom period have been observed.

Scharakteryzowano wpływ różnych typów naturalnej degradacji polimerów (czynników atmosferycznych, wody, gleby, organizmów żywych) na zanieczyszczenie środowiska oraz na działania zmierzające do zagospodarowania odpadów tworzywowych. Omówiono też niektóre problemy związane z użytkowaniem polimerów bio- i fotodegradowalnych. Przedstawiono wyniki prac własnych dotyczących przebiegu biodegradacji poliolefin (PE, i-PP) albo żywicy epoksydowej (ER) z dodatkiem różnych ilości ER modyfikowanej ligniną (LER) oraz wpływu takich układów na wzrost roślin (tabele 1 i 2). Oprócz wpływu dodatniego, zaobserwowano też istotne działania szkodliwe występujące w okresie kwitnienia.