Abstract
We investigated the effect of transplanting young seedlings and intermittent irrigation on the growth and yield of rice on the soil with three profiles of salinity. Fifteen-liter pots were filled with non-saline soil (non-saline plot), with the soil to which 45 g of salt was applied to all layers of the soil (homogeneous saline plot), and with the soil to which 45 g of salt was applied to the lower half layer (heterogeneous saline plot). Younger and older seedlings of paddy rice Nipponbare, at leaf ages of 2.5 and 4.7, respectively were transplanted to these pots, one seedling per pot. Then plants were subjected to continuously submerged soil conditions, or intermittent irrigation. In the non-saline plot, growth of young and older seedlings was poorer in intermittent irrigation than in submerged soil conditions. In the homogenous saline plot, young seedlings died soon after the transplanting and older seedlings survived longer under submerged soil conditions. Salinity distribution was not changed much in submerged soil conditions, but salinity moved up under intermittent irrigation regardless of initial salinity distribution. We concluded that transplanting young seedlings was not acceptable in saline soil because their salinity tolerance was low. Intermittent irrigation was not preferable, because it promoted the accumulation of salt in the upper soil layer. On the other hand, low salinity in the upper soil layer improved seedling survival and early growth. The results suggest that the upper layer should be low in salinity, and the plants should be grown under submerged soil conditions to produce healthy rice plants.
| Original language | English |
|---|---|
| Pages (from-to) | 115-121 |
| Number of pages | 7 |
| Journal | Japanese Journal of Crop Science |
| Volume | 85 |
| Issue number | 2 |
| Publication status | Published - Apr 19 2016 |
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Keywords
- Intermittent irrigation
- Rice
- Root
- Saline soil
- Seedling age
- Submerged soil conditions
ASJC Scopus subject areas
- Agronomy and Crop Science
- Food Science
- Genetics
Cite this
The effects of irrigation method and seedling age at transplanting on the growth and yield of rice grown on heterogeneous saline soils. / Kakehashi, Takahiro; Tsuda, Makoto; Hirai, Yoshihiko.
In: Japanese Journal of Crop Science, Vol. 85, No. 2, 19.04.2016, p. 115-121.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The effects of irrigation method and seedling age at transplanting on the growth and yield of rice grown on heterogeneous saline soils
AU - Kakehashi, Takahiro
AU - Tsuda, Makoto
AU - Hirai, Yoshihiko
PY - 2016/4/19
Y1 - 2016/4/19
N2 - We investigated the effect of transplanting young seedlings and intermittent irrigation on the growth and yield of rice on the soil with three profiles of salinity. Fifteen-liter pots were filled with non-saline soil (non-saline plot), with the soil to which 45 g of salt was applied to all layers of the soil (homogeneous saline plot), and with the soil to which 45 g of salt was applied to the lower half layer (heterogeneous saline plot). Younger and older seedlings of paddy rice Nipponbare, at leaf ages of 2.5 and 4.7, respectively were transplanted to these pots, one seedling per pot. Then plants were subjected to continuously submerged soil conditions, or intermittent irrigation. In the non-saline plot, growth of young and older seedlings was poorer in intermittent irrigation than in submerged soil conditions. In the homogenous saline plot, young seedlings died soon after the transplanting and older seedlings survived longer under submerged soil conditions. Salinity distribution was not changed much in submerged soil conditions, but salinity moved up under intermittent irrigation regardless of initial salinity distribution. We concluded that transplanting young seedlings was not acceptable in saline soil because their salinity tolerance was low. Intermittent irrigation was not preferable, because it promoted the accumulation of salt in the upper soil layer. On the other hand, low salinity in the upper soil layer improved seedling survival and early growth. The results suggest that the upper layer should be low in salinity, and the plants should be grown under submerged soil conditions to produce healthy rice plants.
AB - We investigated the effect of transplanting young seedlings and intermittent irrigation on the growth and yield of rice on the soil with three profiles of salinity. Fifteen-liter pots were filled with non-saline soil (non-saline plot), with the soil to which 45 g of salt was applied to all layers of the soil (homogeneous saline plot), and with the soil to which 45 g of salt was applied to the lower half layer (heterogeneous saline plot). Younger and older seedlings of paddy rice Nipponbare, at leaf ages of 2.5 and 4.7, respectively were transplanted to these pots, one seedling per pot. Then plants were subjected to continuously submerged soil conditions, or intermittent irrigation. In the non-saline plot, growth of young and older seedlings was poorer in intermittent irrigation than in submerged soil conditions. In the homogenous saline plot, young seedlings died soon after the transplanting and older seedlings survived longer under submerged soil conditions. Salinity distribution was not changed much in submerged soil conditions, but salinity moved up under intermittent irrigation regardless of initial salinity distribution. We concluded that transplanting young seedlings was not acceptable in saline soil because their salinity tolerance was low. Intermittent irrigation was not preferable, because it promoted the accumulation of salt in the upper soil layer. On the other hand, low salinity in the upper soil layer improved seedling survival and early growth. The results suggest that the upper layer should be low in salinity, and the plants should be grown under submerged soil conditions to produce healthy rice plants.
KW - Intermittent irrigation
KW - Rice
KW - Root
KW - Saline soil
KW - Seedling age
KW - Submerged soil conditions
UR - http://www.scopus.com/inward/record.url?scp=84964241204&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84964241204&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:84964241204
VL - 85
SP - 115
EP - 121
JO - Japanese Journal of Crop Science
JF - Japanese Journal of Crop Science
SN - 1349-0990
IS - 2
ER -