Influence of manure and nitrogen application on sugar yield and quality of sugar beets [Beta vulgaris], 2: Effect of manure application to the fields differentiated in soil fertility
1989
Yanagisawa, A. (Hokkaido. Tokachi Agricultural Experiment Station, Memuro (Japan)) | Matsuzaki, Y. | Nomura, N. | Okumura, M. | Sanbuichi, T. | Yoshida, T.
The effect of manure application made in combination with nitrogen fertilizer was investigated in 1983 and 1986 at three sites of different soil fertility in Tokachi District, i.e. Memuro (brown andosol), Obihiro (brown andosol) and Ikeda (alluvial soil). The results were as follows: 1) The response of sugar beets to manure application varied among the three sites. In Memuro, the manure application caused an increase in root yield: an application at as high as 9t/10a resulting favorably. At Obibiro, the response of sugar beets to manure application was also positive, but at somewhat lower rate of increase in root yield than for Memuro. At Ikeda, the manure application had little effect of increasing root yields. And, at all the trial sites manure application caused a decline in both sugar content and juice quality. 2) At Memuro, the maximum sugar yield was obtained by applying 3 ton manure/10a + 15kg Nitrogen/10a, or 6(or 9)ton manure/10a + 10kg Nitrogen/10a. It was remarkable that at Obihiro and Ikeda, the maximum sugar yields were obtained from the fields with no manure application. At Obihiro, the maximum sugar yield was caused by 10-15kg Nitrogen/10a, and at Ikeda, by 5kg Nitrogen/10a. 3) The response of sugar beets to applied manure and/or nitrogen fertilizer varied depending on the soil fertility and crop's uptake of nitrogen. The soils in Ikeda were capable of supplying almost enough nitrogen, so that the requirements by sugar beets for nitrogen application were much lower than in the cases of Memuro and Obihiro
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