Summary
The efficacy of CaO2 as an oxygen-supplying seed coating on the emergence of rice seedlings from flooded soils was studied. Seedling response became increasingly dependent on coating rates of 0–40% (by weight of seed loading with 60% CaO2 material) as the depth of planting increased from 0–2.5 cm. No emergence occurred from 5 cm.
The emergence response to 40% CaO2 at 1.5 cm depth of planting was inhibited by the presence of 0.25% finely ground rice straw but was stimulated by increasing pH levels. The organic substrate likely increased microbial competition for available O2 while increasing pH levels improved the rate of CaO2 dissolution during the day 2–8 period of germination. Soil type effects on seedling response were speculated to be due to differences in O2 consumption rates between soils. The addition of CaO to the CaO2 coating improved the emergence response on an unlimed acid soil.
Similar content being viewed by others
References
Chapman A L and Mikkelsen D S 1963 Effect of oxygen supply on seedling establishment of water-sown rice. Crop. Sci. 23, 392–397.
Kordan H A 1974 The rice shoot in relation to oxygen supply and root growth in seedlings germinating under water. New Phytol. 73, 695–697.
Kordan H A 1974 Relationship between oxygen availability and transverse and vertical shoot geotropisms during germination of, submerged rice seedlings. Ann. Bot. 39, 249–256.
Kordan H A 1976 Anaerobiosis-induced etiolation in light-germinated rice seedlings. Ann. Bot. 40, 347–350.
Kordan H A 1976 Oxygen as an environmental factor in influencing normal morphogenetic development in germinating rice seedlings. J. Exp. Bot. 27, 105–110.
Kordan H A 1976 Normal pigment development in germinating rice seedlings is oxygen dependent. Ann. Bot. 40, 1329–1332.
Morinaga T 1925 Catalase activity and the aerobic and anaerobic germination of rice. Bot. Gazette 79, 73–84.
Ohta Y and Nakayama M 1970 Effect of seed coating with calcium peroxide on germination under submerged conditions in rice plant. Proc. Crop. Sci. Soc. Jap. 39, No. 4.
Ohta Y and Nakayama M 1971 Utilization of calcium peroxide for agriculture, as oxygen supplying material. Nogyo Oyobi Engei. 6, 869–872.
Opik H 1973 Effect of anaerobiosis on respiratory rate, cytochrome oxidase activity and mitochondrial structures in coleoptiles of rice (Oryza sativa L.) J. Cell Sci. 12, No. 3, 725–729.
Palmiano E P and Juliano B O 1972 Biochemical changes in the rice grain during germination. Plant Physiol. 49, 751–756.
Parao F T and Yoshida S 1980 Improving rice seedling emergence in flooded soil by use of calcium peroxide. IRRI Seminar, Plant Physiology Department.
Patrick W H Jr and Sturgis M B 1955 Concentration and movement of oxygen as related to absorption of ammonium and nitrate nitrogen by rice. Soil Sci. Soc. Am. Proc. 19, 59–62.
Rao D N and Mikkelsen D S 1977 Effect of acetic, propionic, and butyric acids on young rice seedlings' growth. Agron. J. 69, 923–928.
Rao D N and Mikkelsen D S 1977 Effect of rice straw additions on production of organic acids in a flooded soil. Plant and Soil 47, 303–311.
Reddy K R Rao P S C and Patrick W H Jr 1980 Factors influencing oxygen consumption rates in flooded soils. Soil Sci. Soc. Am. J. 44. 741–744.
Scott A D and Evans D D 1955 A Polarographic method of measuring dissolved oxygen in saturated soil. Soil Sci. Soc. Am. Proc. 19, 12–16.
Taylor D L 1942 Influence of oxygen tension on respiration, fermentation, and growth, in wheat and rice. Am. J. Bot. 29, 721–737.
Turner F T Chen C C and McCauley G N 1981 Morphological development of rice seedlings in water at controlled oxygen levels. Agron. J. 73, 566–570.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Westcott, M.P., Mikkelsen, D.S. The response of rice seedlings to O2 released from CaO2 in flooded soils. Plant Soil 74, 31–39 (1983). https://doi.org/10.1007/BF02178737
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02178737