An Extract
from a thesis publicized at ISINIP (2006)
Rice
Growth in Calcareous Soil Using New Iron-Supplement Fertilizer
“TetsuRiki”
Satoshi MORI*,
Hirohiko SASAMOTO**, Tomoya MATSUYAMA**
*National Institution for Academic Degrees and University Evaluation,
The Univ. of Tokyo, Japan
** Aichi Steel Corporation, Japan
Abstract;
New iron-supplement fertilizer “TetsuRiki” series containing FeO as a
main component has been developed, and the effect of those fertilizers
on the growth of rice under upland conditions of calcareous soil has
been evaluated by pot experiments. Dry weight of shoot and root, and
plant height were remarkably improved in parallel with the improvement
of leaf SPAD value when TetsuRiki Type B2, Type C1,Type W, Type X were
used. The effects were larger in the order of W, B2< C1 and X. Type
A was not effective (Fig.1).
Comparing with FeCl2,FeSO4, and FeNa-EDTA,
the larger effect of plant growth was obtained using B2 and
C1(Fig.2).These
results strongly suggested that the TetsuRiki series
are effective in improving plant iron nutrition in calcareous soil and
much more effective than the usual iron supplements so far used.
Materials
& Methods;
Soil Condition: Fossil seashell soil（pH8.0, CaCO3 70%） 300g / pot
+Slow release fertilizer LongTotal-70 (Chisso-Asahi Fertilizer,
N:P:K＝14:12:14) 1g / pot
+TetsuRiki series (Table.1)
were put to all soil layers
Rice Seed (var.Nihonbare): 20 seeds / pot
Growth Condition: Growth Chamber (25°C-light, 20°C-dark,
15,000lux)
and cultivated for 52 days
