Effect of Application Method for Plant Residue on Fate of the Residue Nitrogen in Some Vegetable
Cultivating Soils. (3722)
Authors:
H. Ueno* - Ehime Univ., Japan Y. Okuno - Ehime Univ., Japan
Abstract:
Organic materials such as plant residues and food wastes have been composted and then applied into farming soils because of the production of plant growth inhibitors during decomposition. However nitrogen loss during composting was appeared to be considerably high. Objectives of this study are to evaluate application method (position in soil) of organic materials in relation to plant growth and to clarify N dynamics in the soils by 15N method. We conducted a pot experiment with some treatments of fertilization such as chemical fertilizer (=control), cow manure compost and plant residue application on soil surface, in top layer, in whole layer.
In the case of radish, dry weight of edible root was followings in descending order;
surface, top layer, compost, whole layer and chemical fertilizer. Nitrogen taken up by the plant from the fertilization and distributed in the root was higher in surface or top layer application than control and compost. Interestingly, greater amount of N from chemical fertilizer accumulated in the plant top than in the root. The similar trends were obtained in a leaf vegetable (Brassica chinensis L.). The given data indicated surface or top layer application of plant residue led to better plant growth and higher N efficiency than whole layer application, and it showed noticeable differences in N distribution of chemical fertilizer or compost.
Speaker Information: Hideto Ueno, Ehime Univ., Japan, University Farm, Ehime Univ.Ko 498, Hattanji, Hojo, Ehime, 799-2424; Phone: +81-89-993-1636; E-mail:
Session Information: Tuesday, November 2, 2004, 8:00 AM-12:00 PM Presentation Start: 8:00 AM (Poster Board Number: 2637)
Keywords: plant residue; organic matter; 15N; vegetable