Abstract
The objective of this study was to examine whether the difference in the effects of saline irrigation conducted at various reproductive stages on the yield of rice (Oryza sativa L.) depends on the sodium and potassium contents in plant organs. Two rice cultivars, Kala-Rata 1-24 (KR1) and IR28 were subjected to saline irrigation (100 mM sodium chloride) at six different reproductive stages for one week. Saline irrigation at the booting stage reduced the winnowed paddy weight. The decrease was due to the decrease in one-grain weight in both cultivars, and also to the decrease in grain number in KR1 and that in the percentage of ripened grain in IR28. One-grain weight decreased as a result of the decrease in hull size. Decrease in winnowed paddy weight and hull size was related to low potassium content in leaves and stems, but was unrelated to sodium content and potassium: sodium ratio. The low potassium content in leaves and stems did not correspond to the low potassium: sodium ratio, indicating that it was not the result of the competition with sodium ion, but was caused by the inhibition of potassium uptake by roots.
| Original language | English |
|---|---|
| Pages (from-to) | 487-494 |
| Number of pages | 8 |
| Journal | Japanese Journal of Crop Science |
| Volume | 68 |
| Issue number | 4 |
| Publication status | Published - 1999 |
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Keywords
- Potassium
- Potassium content
- Reproductive stage
- Rice (Oryza sativa L.)
- Saline irrigation
- Sodium content
- Sodium ratio
- Yield
- Yield components
ASJC Scopus subject areas
- Agronomy and Crop Science
Cite this
Effects of saline irrigation at various reproductive stages on rice yield. / Makihara, D.; Tsuda, M.; Hirai, Yoshihiko; Kuroda, T.
In: Japanese Journal of Crop Science, Vol. 68, No. 4, 1999, p. 487-494.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effects of saline irrigation at various reproductive stages on rice yield
AU - Makihara, D.
AU - Tsuda, M.
AU - Hirai, Yoshihiko
AU - Kuroda, T.
PY - 1999
Y1 - 1999
N2 - The objective of this study was to examine whether the difference in the effects of saline irrigation conducted at various reproductive stages on the yield of rice (Oryza sativa L.) depends on the sodium and potassium contents in plant organs. Two rice cultivars, Kala-Rata 1-24 (KR1) and IR28 were subjected to saline irrigation (100 mM sodium chloride) at six different reproductive stages for one week. Saline irrigation at the booting stage reduced the winnowed paddy weight. The decrease was due to the decrease in one-grain weight in both cultivars, and also to the decrease in grain number in KR1 and that in the percentage of ripened grain in IR28. One-grain weight decreased as a result of the decrease in hull size. Decrease in winnowed paddy weight and hull size was related to low potassium content in leaves and stems, but was unrelated to sodium content and potassium: sodium ratio. The low potassium content in leaves and stems did not correspond to the low potassium: sodium ratio, indicating that it was not the result of the competition with sodium ion, but was caused by the inhibition of potassium uptake by roots.
AB - The objective of this study was to examine whether the difference in the effects of saline irrigation conducted at various reproductive stages on the yield of rice (Oryza sativa L.) depends on the sodium and potassium contents in plant organs. Two rice cultivars, Kala-Rata 1-24 (KR1) and IR28 were subjected to saline irrigation (100 mM sodium chloride) at six different reproductive stages for one week. Saline irrigation at the booting stage reduced the winnowed paddy weight. The decrease was due to the decrease in one-grain weight in both cultivars, and also to the decrease in grain number in KR1 and that in the percentage of ripened grain in IR28. One-grain weight decreased as a result of the decrease in hull size. Decrease in winnowed paddy weight and hull size was related to low potassium content in leaves and stems, but was unrelated to sodium content and potassium: sodium ratio. The low potassium content in leaves and stems did not correspond to the low potassium: sodium ratio, indicating that it was not the result of the competition with sodium ion, but was caused by the inhibition of potassium uptake by roots.
KW - Potassium
KW - Potassium content
KW - Reproductive stage
KW - Rice (Oryza sativa L.)
KW - Saline irrigation
KW - Sodium content
KW - Sodium ratio
KW - Yield
KW - Yield components
UR - http://www.scopus.com/inward/record.url?scp=0033398364&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033398364&partnerID=8YFLogxK
M3 - Article
VL - 68
SP - 487
EP - 494
JO - Japanese Journal of Crop Science
JF - Japanese Journal of Crop Science
SN - 1349-0990
IS - 4
ER -