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Utilization of local available media for growing vegetable plug seedling
|關鍵字:||Local available media|
Several local available growth media including spent golden mushroom compost (GMC), spent shiitake mushroom compost (SMC), wasted cotton (WC), rice hull (RH), carbonized rice hull (CRH), carbonized corn cob (CCC), and red soil (RS) were tested for their physical and chemical properties. The tested properties were compared to three peat moss growth media. GMC, SMC, WC and CCC had good aeration but low water holding capacity. After ageing, GMC and SMC were found decreased in total phenolic compounds and increased in phosphorous and EC. A significant amount of K were found in aged GMC and CRH, while aged SMC was found to contain much more Ca. All the local media tested were low in CEC than peat moss media﹝including TKS1、BVB4 and F1)﹞. Air dried RH、CRH、 GMC、TKS1、 BVB4 and F1 were hard to be reweted. The WC、CCC and RS were easy to be reweted and its rewetability was not affected by the water content. The rewetability of RH、CRH、GMC、SMC、 BVB4 and F1 were decrease with the decrease water content in the media. After losing water in plug, CRH、 GMC、SMC、 BVB4 and F1 were obviously shrunk and prevented water to penetrate the media. The wetting agent AquaGro 2000.L was effectively improving the rewetability of the media with various water content, resulted more uniform water absorption. And morever, it improved the germination of tomato seed. After 30 days of ageing, the temperature in GMC was stopped to change. Content of the total phenolic compounds and the osmolality of the leachant were decreased while the EC value was increased after ageing. Prolonged ageing period acidified the compost and raised the EC to a stand of inhibiting the seed germination as well as seedling growth retardation. The germination of tomato seed was delayed and plug seedling''s growth were retarded in newly obtained GMC compared to aged GMC.
|Appears in Collections:||園藝學系|
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