The Influence of the Medium on Plug Seedlings of Tomato and their Growth after Transplanting

Abstract

十三種供試育苗介質主要是由白泥炭苔及黑泥炭苔所組成，並含有不同比例的真珠石、蛭石、、砂及吸水劑等而使用介質理化性互有不同。在番茄育苗後期(42天)，供試介質之充氣孔隙比育苗前明顯升高；容器容水量比育苗前大幅下降；總孔隙度比育苗前明顯成互有高低的情形；總體密度只呈小幅變化；pH值趨近灌溉水的pH值(6.8~7.0)；而EC值比育苗前大幅下降。綜合在育苗後期各項指標顯示，番茄以PR7A、N1、滿地王3及PG-H等介質所育苗者，其生育情形最佳。但介質物理性範圍無一定規則，而其化學特性pH值在5.52~5.78、EC值在0.36~0.47mS/cm之間。以泥炭苔為主成份的介質，其物理大都俯合穴盤苗生育的需求，而以介質化學性如肥量含量及施肥管理影響穴盤苗生育較大。定植後20天時以N1、PR7A、TP1及對照組介質所育苗者生育最好。The major components of tested media were while and black peat mosses and their physical and chemical properties were varied with ratios of perlite, vermiculite, sand and wetting agent. At the late stage, air-filled porosity of the media increased significantly then before tomato nursery. Container capacity decreased substantially at the late stage as compared to unused media. Total porosity fluctuated among different media while the change in blurk density was not 30 distinct. The pH values of media were changing toward 6.8-7.0 which conincide with the pH value of irrigation water and EC value of medium had decreased dramatically at the late stage of seedling growth then before nursery. To asses major seedling growth. The range of physical properties of those medium is not by rule and chemical properties such as pH value is 5.52 to 5.78 and EC value is 0.36 to 0.47 mS/cm. The major components of tested media were peat mosses and their physical properties fit with the demand of seedling growth . The influence of chemical properties, such as fertilizer content of medium and fertilizing practices are distinct. The N1, PR7A, TP1 and control were the best medium for 20 days after tomato seedling transplant