著者

Khan Harunor Rashid Rahman Shafiur Hussain Mohammad Sultan Adachi Tadashi

出版者

一般社団法人日本土壌肥料学会

雑誌

Soil science and plant nutrition (ISSN:00380768)

巻号頁・発行日

vol.40, no.2, pp.231-242, 1994-06

被引用文献数

3

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A pot experiment was conducted in relation to the growth, yield, and nutrition of rice plants cultivated in an acid sulfate soil treated with chemical fertilizers, basic slag, lime (CaCO_3) MnO_2, and leaching. The soil showed a low pH (4.0-4.5 : field), high ECe (0.7-1.6 Sm^<-1>) and consisted of a sulfuric horizon within the 1.2 m depth of the soil surface. Maximum growth and yield of rice cultivated in the soil were attained by the application of leaching plus basic slag treatment at the rate of 12.5 g kg^<-1>. The other treatments also resulted in a significantly (p <__- 0.05) improved performance compared with the control treatment (where no amendment was applied). Leaching, basic slag, MnO_2, and lime as single amendment brought about a grain yield increase of 500-900%, while leaching plus various doses of basic slag and lime resulted in an increase of grain yield of more than 1,500% over the control treatment. The highest N content of rice was obtained by the application of leaching plus basic slag (12.5 g kg^<-1>) and leaching plus lime (7.5 g kg^<-1>) treatments. The highest P, Ca, and Mg contents were obtained by the application of leaching plus lime treatment at the rate of 7.5 g kg^<-1> and the maximum content of K was recorded after basic slag treatment at the rate of 7.5 g kg^<-1>. Leaching, lime and basic slag treatments led to a decrease of the Fe, Mn, and Zn concentrations in the plants and soil solutions (leachates). The addition of lime, basic slag, or MnO_2 exerted a significant effect (p <__- 0.05) on the decrease of the S content, increase of the soil solution pH, and optimization of some element concentrations in the plants and soil solutions.