Characteristics of boron accumulation by fly ash application in paddy soil.
Fly ash has a high content of plant available silicate which is strongly needed for rice cultivation in Korea. One concern for plants grown on soils amended with fly ash is boron (B) toxicity because most of the fresh fly ash contains considerable B. This study was conducted in paddy soil to determine B uptake by rice and characteristics of B accumulation in soil after fly ash application (0, 40, 80, and 120 Mg fly ash ha(-1)). In all fly ash treatments, B content in rice leaves and available B in soil at all growing stage were higher than those of control, but were not exceeded a toxicity levels. Boron occluded in amorphous Fe and Al oxides comprised ca. 20-39% of total B and was not affected by fly ash application. Most of the B was accumulated by fly ash application as a residual B which is plant-unavailable form, comprised >60% of the total B in soil. Thus, fly ash can be a good soil amendment for rice production without B toxicity.
Lee
Seul Bi
SB
Division of Applied Life Science, Gyeongsang National University, Kaswa-dong, Jinju 660-701, Republic of Korea.
Lee
Yong Bok
YB
Lee
Chang Hoon
CH
Hong
Chang Oh
CO
Kim
Pil Joo
PJ
Yu
Chan
C
D001895:Boron / Q000032:analysis* / Q000302:isolation & purification; D002244:Carbon; D060729:Coal Ash; D005308:Fertilizers; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D007723:Korea; D009930:Organic Chemicals / Q000032:analysis; D012275:Oryza / Q000254:growth & development*; D052638:Particulate Matter; D012987:Soil; D012989:Soil Pollutants / Q000032:analysis
D060729:Coal Ash; D005308:Fertilizers; D007220:Industrial Waste; D009930:Organic Chemicals; D052638:Particulate Matter; D012987:Soil; D012989:Soil Pollutants; D002244:Carbon; D001895:Boron