有機物對青梗白菜生長及其硝酸態氮濃度的影響

Effect of Organic Materials on the Growth and Nitrate Concentration of Chinesecabbage (Brassica chinesis L.)

倪禮豐(Li-Feng Ni) ； 鍾仁賜(Ren-Shih Cnung)

《花蓮區農業改良場研究彙報》 21期 (2003/12) Pp. 57-65

https://doi.org/10.6957/RBHDAIS.200312.0057

摘要

本研究利用盆栽種植喜好硝酸態氮的青梗白菜探討不同有機物在添加或不添加化學氮肥的條件下對其生長及植體中硝酸態氮濃度的影響。所用的有機物為新鮮鋸木屑、鋸木屑與果菜市場廢棄物堆肥及玉米穗軸與果菜市場廢棄物堆肥三種。堆肥的施用量為每公斤土壤50 g。其結果顯示供試土壤的pH值可因堆肥的施用由植前之4.4上升0.7到1.3 pH單位。各處理之青梗白菜植體中的硝酸態氮濃度均高，約為總氮量的一半。土壤中的硝酸態氮濃度高時，植物體內的硝酸態氮濃度也高，但是有機物可以減少硝酸態氮在植物體內之累積。植體中醯胺態氮的量低於2 mg g^(-1)，佔總氮量的4 %以下，且以土壤中的銨態氮濃度高者之濃度較高。

關鍵字

青梗白菜 ； 硝酸態氮 ； 有機物 ； 堆肥

並列摘要

The effect of organic manures on the growth and nitrate concentration of Chinesecabbage (Brassica chinesis L.) was studied under the presence or absence of urea. The plant was cultivated in a 1/5,000 a Wagner pot which contained 3,000 g air-dried soil. The organic materials used were fresh sawdust, compost of sawdust and vegetable waste and compost of corncob and vegetable waste. The application rate of organic manure was 50 g kg^(-1) and that of urea was 0.77 g pot^(-1). The results were as follows. The application of corncob compost and sawdust compost increased the pH of the soil from 4.4 to 5.7 and 5.4, respectively. About a half of nitrogen absorbed by the vegetable remained as an unassimilated nitrate form. The higher the nitrate concentration was in the soil, the higher the nitrate concentration was in the plant. However, the application of organic manure reduced the concentration of nitrate in the plant. The concentration of amide nitrogen was less than 2 mg g^(-1). However, the higher the ammonium nitrogen was in the soil, the higher the amide nitrogen was in the plant.

並列關鍵字

Brassica chinesis L ； nitrate nitrogen ； organic material ； compost