Publication Date
1985
Location
Kyoto Japan
Description
This study was conducted to evaluate the mechanisms of drought resistence of several warm season forage crops . Plants were grown both in field and greenhouse and subjected to sequences to water stress. During experiment, dry matter yield, leaf water potential('V), stomata[ resistance(rs), apparent photosynthesis (P0), transpiration rate(T), root distribution in stressed soil and nutrient uptake were measured. Ratio of dry matter yield of each plant on non-irrigated field to that of the maximum growth obtained by the most suitable watering were higher as follows: Dallisgrass > Rhodesgrass=Bahiagrass >Sorghum> Corn> African millet> Job's tears. 'V of all plants was decreased by water stress, and rs was increased, but rs of tolerants remained lower than sensitive's at the low 'If. Water use efficiency (P JT) of Rhodesgrass was increased by stress, but that of Job's tears was severely lowered. The root development of sensitives was inhibited by stress. That is, Rhodesgrass was developing its root in more deep.layer of soil under stress, but of Job's tears was distributed in the shallow. The nutrient uptake had generally suppressed by stress, but senesitive's were more severely than tolerant's. It is concluded from these results that drought resistance plants (1) do not much increase their rs at the lower \J1, and retain their higher dry matter production abilities, with high pJT through maintaining their higher photosynthesis under water stress, (2) keep their high water and nutrient uptake abilities by well development of their roots were supported with an efficient translocation of assimilate from leaves even under the water stress condition.
Citation
Ogata, S; Saneoka, H; and Matsumoto, K, "Nutritio-Physiological Evaluation of Drought Resistance of Warm Season Forage Crops" (1985). IGC Proceedings (1985-2023). 29.
(URL: https://uknowledge.uky.edu/igc/1985/ses3/29)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Nutritio-Physiological Evaluation of Drought Resistance of Warm Season Forage Crops
Kyoto Japan
This study was conducted to evaluate the mechanisms of drought resistence of several warm season forage crops . Plants were grown both in field and greenhouse and subjected to sequences to water stress. During experiment, dry matter yield, leaf water potential('V), stomata[ resistance(rs), apparent photosynthesis (P0), transpiration rate(T), root distribution in stressed soil and nutrient uptake were measured. Ratio of dry matter yield of each plant on non-irrigated field to that of the maximum growth obtained by the most suitable watering were higher as follows: Dallisgrass > Rhodesgrass=Bahiagrass >Sorghum> Corn> African millet> Job's tears. 'V of all plants was decreased by water stress, and rs was increased, but rs of tolerants remained lower than sensitive's at the low 'If. Water use efficiency (P JT) of Rhodesgrass was increased by stress, but that of Job's tears was severely lowered. The root development of sensitives was inhibited by stress. That is, Rhodesgrass was developing its root in more deep.layer of soil under stress, but of Job's tears was distributed in the shallow. The nutrient uptake had generally suppressed by stress, but senesitive's were more severely than tolerant's. It is concluded from these results that drought resistance plants (1) do not much increase their rs at the lower \J1, and retain their higher dry matter production abilities, with high pJT through maintaining their higher photosynthesis under water stress, (2) keep their high water and nutrient uptake abilities by well development of their roots were supported with an efficient translocation of assimilate from leaves even under the water stress condition.
