金泥（蛭石）用途?

金泥（蛭石）的用途是什麼?
用於溝什麼泥可以使種子快速發芽?

344a 發表於 2014-9-13 23:13
其實同珠石一樣，疏水通氣。

O ic
其實珠石/蛭石溝的比例如何?(培養土）

http://www.youtube.com/watch?v=wPjqo6Ad1Gw
http://www.youtube.com/watch?v=2IA8T3GXqBU

http://baike.baidu.com/view/915187.htm

蛭石保水力保肥力皆高於珠石
但會隨時間瓦解堅變泥降低通氣性

珠石是將玻璃質打散開而成
基本上是完全chemically inert 的東西   
用以保持泥土結構

蛭石是一層又一層帶 -ve charge plate夾著ion的千層糕 是以保肥

http://cpl.usu.edu/files/publications/factsheet/pub__7320194.pdf

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Vermiculite's strong buffer capacity renders it unsuitable for studies of acidity on soybean (Glycine max L.) nodulation and growth.
http://www.ncbi.nlm.nih.gov/pubmed/24229409



聽聞有一定 中性 pH buffering 能力....個人未有求証過

"Buffering ability of vermiculite was also shown by Duman and Tunç [15] when water of different pH (2.20, 3.0, 5.95, and 10.58) was added to vermiculite substrate. The initial pH value of water was adjusted to 2.20, 3.0, 5.95, and 10.58 by adding HCl or NaOH before preparation of vermiculite/water suspension. Then, vermiculite was added on it and the pH value of the suspension was recorded at various time intervals. Vermiculite increased acid suspension pH from 2.20 to 2.24, from 3.0 to 5.77, from 5.95 to 9.79; and slightly decreased alkaline pH from 10.58 to 10.10 after 180 minutes. Similar to our finding, it is shown here that buffering capacity of vermiculite decreased when the pH of water was very acid (2.20) or very alkali (10.58).

The increase of suspension pH by vermiculite was caused by the adsorption of H+ ions from solutions to the negatively charged surface of vermiculite. As explained by Duman and Tunç [2] vermiculite layers have permanent negative charges; but when the pH of solution was very alkali, the transfer of protons from SiOH (or AlOH) groups in the lattice of vermiculite to free OH- ions with formation of H2O in the suspension may cause a decrease in pH value."

月季扦插用蛭石+水可大大提高存活率