Present address: National Agriculture and Food Research Organization, National Agricultural Research Center, Tsukuba 305-8666, Japan.
Maintenance of soybean yield with reduced phosphorus application by previous cropping with mycorrhizal plants
Article first published online: 13 DEC 2010
© 2010 Japanese Society of Soil Science and Plant Nutrition
Soil Science & Plant Nutrition
Volume 56, Issue 6, pages 824–830, December 2010
How to Cite
OKA, N., KARASAWA, T., OKAZAKI, K. and TAKEBE, M. (2010), Maintenance of soybean yield with reduced phosphorus application by previous cropping with mycorrhizal plants. Soil Science & Plant Nutrition, 56: 824–830. doi: 10.1111/j.1747-0765.2010.00518.x
- Issue published online: 13 DEC 2010
- Article first published online: 13 DEC 2010
- Received 26 April 2010. Accepted for publication 26 October 2010.
- arbuscular mycorrhizal fungi;
- available phosphorus;
- crop rotation;
- rhizosphere management;
Previous cultivation of arbuscular mycorrhizal (AM)-host plants promotes AM colonization, phosphorus (P) uptake and the growth of succeeding AM-host plants. Three field experiments were conducted to investigate whether reduced application rates of P fertilizer could maintain soybean (Glycine max (L.) Merr. cv. Tsurumusume) yields when fields were previously cropped with AM-host plants. In the experiments, soybean was cropped after growing both AM-host (wheat, sunflower, vetch, maize and azuki bean) and non-AM-host plants (radish, white mustard, sugar beet and buckwheat) or fallow with different rates of P fertilizer (0–200 kg P2O5 ha−1). The results showed that previous cropping with AM-host plants increased AM colonization of soybean roots, soybean growth, shoot P content and yield compared with either previous cropping with a non-AM host or fallow treatment. Soybean yields following AM-host plants did not decrease with reductions in the P application rate from 150 to 50 kg P2O5 ha−1, although soybean yields decreased in some cases after non-AM-host plants or fallow treatment. A general linear model analysis revealed that soybean yield following AM-host plants was less affected by a reduction in P application rate than plants following non-AM-host plants. As a result, P application rates can be reduced from 150 kg P2O5 ha−1 (the rate recommended by the Hokkaido Government) to 50 kg P2O5 ha−1 for soybean cultivation in soils after AM-host plants.