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vol. 10, nr. 1 (2007)
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Water-air properties of Grodan® Master rockwool
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Monika Jaroszuk-Sierocińska
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Institute of Soil Science and Environment Management, Agricultural University, ul. S. Leszczyńskiego 7 20-069 Lublin |
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vol. 10 (2007), nr. 1,
pp. 113-120
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abstract:
A study was carried out on the water-and-air properties of rockwool GRODAN® Master. The paper presents a detailed discussion of those properties which have should be considered as very important for the estimation of the physical condition of the beds in containers. These are: full water-capacity, container water capacity, i.e. the contents of water corresponding to the potential of –0.98 kPa, air content in the state of the container water capacity (–0.98 kPa), as well as the retention of easily available water, from –0.98 to –9.81 kPa. The rockwool under study was characterized by very good properties from the point of view of the need of garden production in containers: quite a considerable full water capacity – 12.40 kg kg-1, and, above all, an exceptionally high container water capacity – 11.23 kg kg-1. As for the air properties, the mineral wool should be also estimated in a positive way. Its air capacity in the state of box water capacity (–0.98 kPa) was 0.09 m3 m-3, and so it was insignificantly lower than the critical value of 0.10 m3 m-3. It is possible to establish an ideal system of water and air relationship by suitable forming of the water potential in the bed of the rockwool.
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keywords:
rockwool, water and air properties
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original in:
Polish
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