GHANEM, S., ALI, R., REZK, M., ABDEL-RAZIK, A. (1998). INFLUNENCE OF SEASONAL FLOODING PERIOD AND THE APPLICATION OF ZINC, IRON, AND MANGANESE ON THE AVAILABILITY OF APPLIED PHOSPHOROUS, GROWTH AND YIELD OF RICE.. Egyptian Journal of Agricultural Research, 76(1), 175-190. doi: 10.21608/ejar.1998.346128
SOBHY A. GHANEM; RAFAT A. ALI; MOSTAFA M. REZK; ADEL M. ABDEL-RAZIK. "INFLUNENCE OF SEASONAL FLOODING PERIOD AND THE APPLICATION OF ZINC, IRON, AND MANGANESE ON THE AVAILABILITY OF APPLIED PHOSPHOROUS, GROWTH AND YIELD OF RICE.". Egyptian Journal of Agricultural Research, 76, 1, 1998, 175-190. doi: 10.21608/ejar.1998.346128
GHANEM, S., ALI, R., REZK, M., ABDEL-RAZIK, A. (1998). 'INFLUNENCE OF SEASONAL FLOODING PERIOD AND THE APPLICATION OF ZINC, IRON, AND MANGANESE ON THE AVAILABILITY OF APPLIED PHOSPHOROUS, GROWTH AND YIELD OF RICE.', Egyptian Journal of Agricultural Research, 76(1), pp. 175-190. doi: 10.21608/ejar.1998.346128
GHANEM, S., ALI, R., REZK, M., ABDEL-RAZIK, A. INFLUNENCE OF SEASONAL FLOODING PERIOD AND THE APPLICATION OF ZINC, IRON, AND MANGANESE ON THE AVAILABILITY OF APPLIED PHOSPHOROUS, GROWTH AND YIELD OF RICE.. Egyptian Journal of Agricultural Research, 1998; 76(1): 175-190. doi: 10.21608/ejar.1998.346128
INFLUNENCE OF SEASONAL FLOODING PERIOD AND THE APPLICATION OF ZINC, IRON, AND MANGANESE ON THE AVAILABILITY OF APPLIED PHOSPHOROUS, GROWTH AND YIELD OF RICE.
1Field Crops Research Institute, Agricultural Research Centre, Giza, Egypt
2Soil Department, Faculty of Agriculture, Kafr El-Sheikh Governorate, Egypt
Abstract
Two field experiments were conducted at the Rice Research and Training Center, at Sakha, Kafr El-Sheikh, Egypt in 1993 and 1994 rice seasons to study the effect of seasonal Flooding period, zinc, iron and manganese application on the utiliation of applied phosphorous, content and uptake as well as the productivity of Giza 181 rice variety. Three phosphorous levels and the recommended dose of Zn, Fe and Mn were applied. Soil samples were collected every week after flooding up to 12 weeks and chemically analyzed for available phosphorous in the soil. Plant samples were collected at tillering, panicle initiation, booting and flowering stages, moreover, phosphorous content and uptake were estimated. Yield and yield components were evaluated at harvest. The main results showed that the utilization of applied phosphorous increased with period of flooding up to the 12 weeks. The application of Zn, Fe, and Mn significantly with plant age up to booting stage and decreased at flowering stage. Results showed also that plant phosphorous content and uptake decreased significantly with the application of Zn, Fe and Mn to the rice soil. The reduction in phosphorous content and uptake was less pronounced with zinc application than with iron or manganese application. Yield and yield components were increased significantly with increasing phosphorous level up to 72 kg P205/ha with or without the application of micronutrients. While, the application of Fe and Mn caused a significant reduction in yield and yield components compared with control.
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