Pedosphere 11(1): 57--62, 2001
ISSN 1002-0160/CN 32-1315/P
©2001 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Effect of bacterial-feeding nematode inoculation on wheat growth and N and P uptake |
| LI Hui-Xin and HU Feng |
| Collage of Resources and Environmental Sciences and Institute of Agricultural Resources and Eco-environment, Nanjing Agricultural University, Nanjing 210095 (China) |
| ABSTRACT |
| A 40-day gnotobiotic microcosm experiment was carried out to quantify the effect of bacterial-feeding nematode on plant growth and nutrient absorption. The results showed that inoculation of bacterial-feeding nematode Protorhabditis sp. stimulated the growth of wheat (Triticum aestivum) and the uptake of N. By the end of the 40-day incubation wheat biomass and N uptake in the treatment with nematode and bacteria (Pseudomonas sp.) increased by 6.5% and 5.9%, respectively, compared with bacteria alone treatment. The presence of nematode mainly accelerated the growth of aboveground of wheat, while it slightly inhibited the root development. There was little difference in plant tissue N concentration between treatments. P concentration and uptake of wheat, however, were generally reduced by nematode. It appears that the enhancement of plant growth and nitrogen uptake is attributed to the enhancement of nitrogen mineralization induced by nematode feeding on bacteria, and the reduction of phosphorous uptake is the result of weak root status and competition by bacteria immobilization. |
| Key Words: bacterial-feeding nematode, nematode-bacteria interaction, nitrogen and phosphorous uptake, wheat growth |
| Citation: Li, H. X. and Hu, F. 2001. Effect of bacterial-feeding nematode inoculation on wheat growth and N and P uptake. Pedosphere. 11(1): 57-62. |
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