English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The objective of this study was to determine the effect of zinc, copper and cadmium on phytomass and grain production and to evaluate indirectly the adsorbent effect of bentonite clay by determining the accumulation of these heavy metals in bean plants. The study consisted of three separate experiments (one for each cation) with the application of three doses of bentonite (0, 30 and 60 t ha-1) in pots containing separately 50 mg of Zn; Cu and Cd kg-1 of soil, with three replicates. Thus, each experiment consisted of 9 experimental units. In each one, a bean plant was cultivated and after 65 days, samples of leaves, stems, roots and grains were collected. Afterwards, the samples were dried, weighed, grinded and the concentrations of Zn, Cu and Cd were determined. The phytomass of leaves of the plant growing on the soil with Zn, the Zn concentration in the whole plant and the Cd concentration in the leaves, stem and grains were significantly influenced by the bentonite application. Zn and Cd concentration in leaves, stem and grains decreased with the application of bentonite, indicating a positive effect of the clay application to the soil on the adsorption of these metals, decreasing the availability for plants. Zn was the most accumulated element in the plant, followed by Cd and Cu. The Zn, Cu and Cd accumulation in the plant obeyed the following sequence: stem > leaves > grains > roots; roots > stem > grains > leaves; roots > stem > leaves > grains, respectively. Objetivou-se, com este trabalho, estudar o efeito do cobre, zinco e cádmio em fitomassa e produção de grãos e avaliar indiretamente o efeito adsorvente da argila bentonita, determinando o acúmulo de metais pesados em plantas de feijão. O estudo consistiu de três experimentos separados (um para cada cátion), com a aplicação de três doses de bentonita (0, 30 e 60 t ha-1) em vasos contendo, separadamente, 50 mg de Zn, 50 mg de Cu e 50 mg de Cd kg-1 de solo, com três repetições. Assim, cada experimento consistiu de nove unidades experimentais e em cada uma delas se cultivou uma planta; aos 65 dias após o plantio, colheramse folhas, caules, raízes e grãos que, depois de secos, pesados e moídos, foram analisados para Zn, Cu e Cd. A fitomassa das folhas das plantas cultivadas no solo com Zn, a concentração de Zn na planta inteira e a concentração de Cd nas folhas, caule e grãos foram significativamente influenciados pela aplicação de bentonita. As concentrações de Zn e Cd nas folhas, caule e grãos, diminuíram com a aplicação de bentonita indicando efeito positivo da aplicação de argila no solo sobre a adsorção desses metais, diminuindo a disponibilidade para as plantas. Zn foi o elemento que mais se acumulou nas plantas, seguido pelo Cd e Cu. O acúmulo de Zn, Cu e Cd na planta obedeceu a seguinte sequência: caule > folha > grãos > raiz; raiz > caule > grãos > folha; raiz > caule > folha > grãos, respectivamente

Phytomass of beans and grain production as affected by zinc, copper and cadmium doses and bentonite application