堆置与添加蛭石对污泥蚓粪培育茄子幼苗的影响

doi:10.3864/j.issn.0578-1752.2014.23.012

Abstract

Abstract: 【Objective】 Sludge vermicompost contains large amounts of nutrients and bioactive substances, and it has the potential to be exploited as potting media. This paper aims to investigate the effects of the potting media produced by activated sludge vermicompost stacked and added vermiculite on eggplant seedlings development. The changes of the characteristics of the available NPK, pH and the electrical conductivity (EC) of the potting media were also studied. 【Method】 In this experiment, potting media were prepared by adding different amount of vermiculite (volume ratio: vermicompost﹕vermiculite =1﹕0, 2﹕1, 4﹕1, 8﹕1) to fresh sludge vermicompost and stacked sludge vermicompost (stacked for 180 days), and commercial peat potting medium was used as a control. Eggplant seedlings were cultivated in a greenhouse. 【Result】 The results showed that sludge vermicompost-based nursery media were better for eggplant seedling development compared with the traditional peat-based nursery media. Both fresh and stacked sludge vermicompost could significantly increase the evaluation indexes of eggplant seedlings, such as the leaf expanded ness, root surface area, root diameter, root volume, shoot dry weight, total dry weight, root/shoot ratio and the strong seedling index.The chlorophyll of eggplant seedlings increased significantly for growing in fresh vermicompost media, and the root length increased significantly for growing in stacked vermicompost media. The impact of fresh sludge vermicompost added with different amounts of vermiculite on eggplant shoot growth was less than stacked sludge vermicompost, while stacked vermicompost on root growth was more than fresh sludge vermicompost. To sludge vermicompost, stacking resulted the decrease in the available nitrogen, available phosphorus and the pH, while increased the EC. To the fresh and stacked sludge vermicompost, adding vermiculite decreased the available nitrogen, available phosphorus, available potassium, and the EC while increased the pH, and the change scope elevated with the added vermiculite increased. After nursery, the contents of the available NPK in the sludge vermicompost media were significantly higher than that in commercially potting media, but no significant difference in pH changes. It was more conducive to the development of eggplant seedlings that the potting media made from the fresh sludge and vermiculite in the volume ratio of 2﹕1, and stacking sludge vermicompost and vermiculite in the volume ratio of 8﹕1. 【Conclusion】 In short, the sludge vermicompost could be used as raw material for potting media for eggplant seedling nursery. The important reasons for the sludge vermicompost promoted the eggplant seedling growth were continuing supply of a large amount of available mineral nutritious. Although the process of stacking sludge vermicompost reduced the available nitrogen, the available phosphorus, and increased the EC, in the eggplant nursery, from the points of the convenient production, costs reduction, ensuring the quality of seedlings, and improving the vermicompost media use security, the recommended potting medium should be made by stacked sludge vermicompost and vermiculite in accordance with the 8﹕1 of volume ratio.

Key words: sludge vermicompost, stacking, vermiculite, nursery medium, eggplant seedling

ZHAO Hai-tao, LI Tian-peng, YAO Xu, ZHAO Lei-ming, HONG Qi-dong, YAN Zhi-jun, SHAN Yu-hua, FENG Ke. Effects of the Potting Media Produced by Activated Sludge Vermicompost Stacked and Added Vermiculite on Eggplant Seedlings[J].Scientia Agricultura Sinica, 2014, 47(23): 4668-4679.

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Effects of the Potting Media Produced by Activated Sludge Vermicompost Stacked and Added Vermiculite on Eggplant Seedlings

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