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Research Article Open access CC BY 4.0

Pot growing Media Amendment with Calcium Cyanamide and Weed Control Relationships

M. Leytur, A. C. Duarte Vera, A. Sala, B. Giardina, A. Di Benedetto

International Journal of Plant & Soil Science · pp. 1–12 · Published 19 Jul 2018

10.9734/IJPSS/2018/42425

Abstract

The aim of this research was to characterize the effect of a pre-transplant calcium cyanamide fertilization on weed control in the potted bedding ornamental plant Impatiens wallerana and to describe the physiological mechanisms involved. The positive effect of a calcium cyanamide amendment included both ammonium toxicity on weed seed germination and a decrease of weed rates growth such as relative leaf expansion rate (RLAE) and relative growth rate (RGR). Data showed RGR-NAR (net assimilation rate), RLAE-RGR, RLAE-NAR and RGR-root dry weight relationships, which would explain ammonium toxicity to roots and weed growth responses. These effects probably could be explained by a change in hormonal root synthesis. Our results showed that a pre-transplant calcium cyanamide amendment combining with a transplant routine optimize both I. wallerana growth and weed control.

Growing media ammonium toxicity transplants weeds

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