Organic matrices

Author(s):  
R. Bunsell ◽  
S. Joannes ◽  
A. Thionnet
Keyword(s):  
Agronomy ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 851
Author(s):  
Sonia Cacini ◽  
Sara Di Lonardo ◽  
Simone Orsenigo ◽  
Daniele Massa

Professional peat-free substrates for ornamental plant production are increasingly required by nursery growers. Most promising materials are green compost, coconut coir dust, and woody fibre, used alone or in mixtures. One of the major concerns is pH, usually higher than optimal. In this work, a method based on a three-step procedure was adopted to acidify three organic matrices alone or in mixtures and to individuate the most suitable product, between iron(II) sulphate 7-hydrate and elemental sulphur chips. Firstly, the determination of the buffering capacity by dilution with sulphuric acid was carried out to determine dosages. Afterwards, an incubation trial of 84 (iron(II) sulphate) or 120 days (sulphur chips) was conducted on matrices and substrate mixtures with calculated doses in a climatic chamber maintained at 21 °C. Iron(II) sulphate resulted not suitable because it caused a rapid, but not lasting, pH lowering and an excessive electrical conductivity (EC) increase. Sulphur chips could instead guarantee an adequate and lasting pH lowering. These results were then validated in the open field trial on matrices and substrates. The proposed acidification methodology could be considered in developing new substrates, but the rapidity of pH acidification and EC increase on plant and mineral nutrition should be further investigated.


1986 ◽  
Vol 123 (1-2) ◽  
pp. 59-63 ◽  
Author(s):  
Hayao Imamura ◽  
Yasutoshi Murata ◽  
Susumu Tsuchiya
Keyword(s):  

2003 ◽  
Vol 265 (2) ◽  
pp. 265-275 ◽  
Author(s):  
Fusheng Li ◽  
Akira Yuasa ◽  
Hajime Chiharada ◽  
Yoshihiko Matsui

2004 ◽  
Vol 85 (12) ◽  
pp. 2160-2162 ◽  
Author(s):  
A. Costela ◽  
I. García-Moreno ◽  
D. del Agua ◽  
O. García ◽  
R. Sastre

1997 ◽  
Vol 59 (2-3) ◽  
pp. 241-247 ◽  
Author(s):  
Jason R. Oppenheimer ◽  
Andrew G. Martin ◽  
Larry P. Walker
Keyword(s):  

Sign in / Sign up

Export Citation Format

Share Document