Salt Tolerance of Grain Crops in Relation to Ionic Balance and Ability to Absorb Microelements
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概要
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A greenhouse experiment was conducted to investigate the effect of exchangeable Na on the growth and absorption of metal elements in barley, rye, and maize. The plants were cultivated in soils whose exchangeable sodium percentages (ESP) were 6.6 (saline soil : Saline), 17.4 (saline-sodic soil : Sodic 1), and 39.6 (sodic soil : Sodic 2), which were prepared from Tottori sand dune soil (Control). The dry weight (DW) and concentrations of metal elements (K, Ca, Mg, Na, Fe, Mn, Zn, and Cu) in shoots were analyzed. The shoot DW was smaller with higher ESP, but in barley the difference between all the treatments was no longer observed with time. In Sodic soils, the growth of barley was vigorous, whereas rye growth was poor, and maize plants died by 5 weeks after planting. The Na concentration in shoots of all the species was higher with higher ESP. The K concentration in shoots was low at the early growth stage, but in barley it was higher in the Saline and both Sodic soils than in the Control at the subsequent stages. The concentrations of Ca and Mg in shoots of barley and maize in the Saline and both Sodic soils were higher than those in the Control, but in rye the concentrations were lowest in Sodic 2. The concentrations of Mn, Zn, and Cu in barley shoots in the Saline and both Sodic soils tended to be higher than those in the Control, whereas in rye they were lower than in the Control in both Sodic soils. Barley showed a higher ability to absorb low available microelements than rye and maize. These results indicate that barley is tolerant to sodicity as well as salinity, maize is tolerant to salinity, but is very sensitive to sodicity, and rye is moderately sensitive to both stresses. We suggest that the tolerance of grain crops to ESP involves a tolerance to a high Na concentration in shoots, the ability to keep suitable concentrations of essential cations in the presence of a high concentration of Na in shoots and the ability to absorb low available microelements.
- 社団法人日本土壌肥料学会の論文
著者
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FUJIYAMA HIDEYASU
Faculty of Agriculture, Tottori University
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Yamada Mina
Arid Land Research Center Tottori University
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Yamada Satoshi
Institute For Experimental Animals Kobe University School Of Medicine
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Yamada Satoshi
Laboratory Of Plant Nutrition Faculty Of Agriculture Hokkaido University
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Yamada Satoshi
Faculty Of Agriculture Tottori University
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Fujiyama Hideyasu
Faculty Of Agriculture Tottori University
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Fujiyama Hideyasu
Department Of Agricultural Chemistry Faculty Of Agriculture Tottori University
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Yamada M
Arid Land Research Center Tottori University
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Fujiyama H
Faculty Of Agriculture Tottori University
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Yamada S
Fac. Agr. Tottori Univ.
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Achmadi Jumberi
Faculty of Agriculture, Tottori University
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Jumberi Achmadi
Faculty of Agriculture, Tottori University
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Achmadi Jumberi
Faculty Of Agriculture Tottori University
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