Fused phosphate and slag as a fertilizer in nursery of rice
1981
Hwang, Y.S. | Ryu, I.S. (Inst. of Agricultural Sciences, Suweon (Korea R.)) | Ohh, W.K. (The City Univ. of Seoul, Seoul (Korea R.))
To determine the effects of phosphate and silicate fertilizers on the growth of young rice plants in nursery, relationships between dry matter production and nutrient uptake at different fertilizer application rates were investigated for two rice varieties, Milyang 23 (a Indica - Japonica hybrid) and Akibare (a Japonica). The maximum dry matter production was obtained at 75-150 kg/10a of fused phosphate and 100-200 kg/10a of slag, respectively, however, a some variations between varieties were recognized. The top/root ratio of varieties around 1.0 was proper for healthy seedings and this ratio was reached at application of 75 kg/10a of fused phosphate than in slag. The growth of seedling was severely retarded when soil pH was increased above 7 by the application of more than 225 kg/10a of fused phosphate and 400 kg/10a of slag
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