The status of manganese in the soil and rice plants under different water systems and fertilizer applications
Tóm tắt
An experiment was conducted in the greenhouse at Assiut University (Assiut, Egypt) to study the status of manganese in both the soil and rice plants under different water and fertilizer treatments. Rice seeds were sown in pots containing a clay loam soil submerged with water for a period of 45 days after which treatments were initiated. Water treatments consisted of five systems: continuous submergence, field capacity, saturation percentage, and alternative submergence for either 4 or 6 days followed by one day of drainage. Fertilizer treatments included the application of ammonium sulphate and/or manganese sulphate at three rates. Both the soil and rice plants were sampled at three intervals: 4,8, and 12 weeks after treatment initiation. Samples were properly prepared and analyzed for manganese. Statistical analysis of the obtained data was carried out for both the separate as well as the combined effects of all treatments. Results showed that the concentration of Mn in both the soil and the rice shoots was significantly increased as the period of water submergence was extended. Continuous submergence proved to be superior to all other water systems tested. Due to the slightly acidic nature of ammonium sulphate, its application resulted in increasing the concentration of Mn in the soil and subsequently in the shoots. Addition of manganese sulphate did not materially affect the level of Mn in the soil except after enough time was allowed (about 3 months). However, plant uptake of Mn was increased appreciably under such addition.
Tài liệu tham khảo
Adams F., Methods of Soil Analysis, Part 11. Edited by C. A. Black and others. Amer. Soc. Agron. Inc., Pub. Madison, Wisconsin, U.S.A., pp. 1011–1017 (1965).
Aiyer S. P., The role of minor elements in rice growing. Indian Farming 7, 11–14 (1964). After Ponnamperuma, F. N., See Ref. 7.
Cherian E. C., Paulson G. M., and Murphy L. S., Nutrient uptake by lowland rice under flooded and non-flooded soil conditions. Agron. J. 60, 554–557 (1968).
Clark F., Nearpass D. C., and Specht A. W., Influence of organic additions and flooding on iron and manganese uptake by rice. Agron. J. 48, 586–589 (1957).
Duncan D. G., Multiple range and multiple F-tests. Biometrics, 11, 1–42 (1955).
Enyi B. A. C., Comparative studies of upland and swamp rice varieties. I. Effect of soil moisture on growth and nutrient uptake. J. Agr. Sci. 71, 1–13 (1968).
Ponnamperuma F. N., Dynamic Aspects of flooded Soils and the nutrition of the rice plant. In The Mineral Nutrition of the Rice Plant, p. 295. John Hopkins Press, Baltimore (1964).
Kelly W. P., The function and distribution of manganese in plant and soils. Hawai Expt. Sta. Bull. 26 (1912).
Mandel L. N., Transformation of iron and manganese in waterlogged rice soils. Soil Sci. 91, 121 (1961).
Mann P. J. G., and Quastel J. H., Manganese metabolism in soils. Nature 159, 154–156 (1946).
Ponnamperuma, F. N., The chemistry of submerged soils in relation to the growth and yield of rice. Ph. D. Thesis. Cornell Univ., Ithaca, N.Y. (1955).
Seshagiri R., and Krishna Rao D. V., Manganese toxicity in rice. Andhro Agr. 5, 130–134 (1958). After Ponnamperuma F. N., See Ref. 7.
Tesima S., Changes of paddy field soil reaction produced by long-continued use of artifical fertilizers. J. Sci. Soil Manure Japan 13: 337–343 (1939).
Vlamis J., and Williams D. E., Iron and Manganese relations in rice and barley. Plant and Soil 20, 221–231 (1964).