利用微波發泡製備稻稈無土栽培介質的可行性探討

Preparation of Rice Straw Soilless Culture Medium by Microwave Foamin Method

黃芸(Y. Huang) ； 張志鵬(C. P. Chang)

《華岡紡織期刊》 20卷3期 (2013/09) Pp. 144-149

摘要

本研究主要是以稻稈為基材製作無土栽培之栽培介質，經過添加聚乙烯醇水溶液(9%、10%、11%)與海藻酸鈉水溶液(2%、3%、4%)均勻混合，加入20g 稻稈使用攪拌機均勻混合後利用微波發泡原理製作栽培介質，再浸泡於氯化鈣水溶液(3%)中使其與海藻酸鈉水溶液進行交鏈，達到固化之效果，樣本完成後即可進行發泡成形和物性之測試。結果顯示在10%PVA 水溶液30g 與3%海藻酸鈉水溶液35g 混合20g 稻稈時樣本成形達到設定模具之大小。樣本EC 值約為1ms/cm，pH 值約為5.55，均符合植物生長理論之範圍，最佳樣本含水率為770.47%，保水力則可達42 小時，皆優於市面上常見基質。

關鍵字

稻稈 ； 無土栽培 ； 聚乙烯醇水溶液 ； 成形性 ； 發泡

並列摘要

This study is mainly based on rice straw substrate for the production of soilless culture cultivation medium, after adding aqueous polyvinyl alcohol (9%, 10%, 11%) and sodium alginate aqueous solution (2%, 3%, 4%) even mixing, adding 20g rice straw using a mixer after mixing using the microwave foamed principle production cultivation medium, and then immersed in a calcium chloride aqueous solution (3%) with the sodium alginate aqueous solution crosslinking, to achieve the effect of curing, the sample evenly completed after the foam forming and physical properties of the test can be carried out. The results show the sample when mixed in the 10% PVA aqueous solution of 30g of 3% sodium alginate aqueous solution 35g 20g rice straw molded to achieve the size of the set of molds. Sample EC value of approximately 1ms/cm, the pH value of about 5.55, are in line with the scope of the theory of plant growth the best sample moisture content was 770.47%, the water retention capacity of up to 42 hours, are superior to the common market matrix.

並列關鍵字

straw ； soilless cultivation ； PVA ； formability ； foam