Abstract
Using15 N tracer technique, the fate and efficiency of nitrogen in supergranules of urea as compared with that in powdered urea were studied in rice fields. The results obtained show that supergranules of urea were characterized by the slight N loss and high N recovery as well as by delayed but long lasting fertilization effects. It follows that the supergranules should be applied earlier and at a lower rate as compared with powdered urea.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Bremner JM (1965) Isotope-ratio analysis of nitrogen in nitrogen-15 tracer investigations. In Black CA, editor-in-chief. Methods of Soil Analysis, Part 2. Agronomy 9, 1256–1282
Chen Rong-ye and Fan QZ (1978) The status of nitrogen supply of deep drilled ammonium bicarbonate pills in non-calcareous paddy soils. Acta Pedologica Sinica 15, 75–82
Li Ching-kwei and Chen Rong-ye (1980) Ammonium bicarbonate used as a nitrogen fertilizer in China. Fertilizer Research 1, 125–136
Craswell ET and De Datta SK (1980) Recent developments in research on nitrogen fertilizers for rice. IRRI Research paper series No 49. Manila, Philippines: International Rice Research Institute
Craswell ET and Vlek PLG (1979) Greenhouse evaluation of nitrogen fertilizers for rice. Soil Sci Soc Am J 44, 1184–1188
Ji Kuo-liang and Wang Ching-hua (1978) Application of micro-electrodes for the study of release of granulated ammonium bicarbonate in paddy soils. Acta Pedologica Sinica 15, 182–186
Jiang Neng-hui and Liu Guang-song (1980) Diffusion and loss from ammonium bicarbonate and aqueous ammonia applied to soils. Acta Pedologica Sinica 17, 89–93
Liu Zhi-yu and Qin Sheng-we (1982) The study of nitrogen distribution around rice rhizosphere. Proc Symp on Paddy Soils, October 19–24, 1980, Nanjing, China (in press)
Nommik H (1976) Further observations on ammonia loss from urea applied to forest soil with special reference to the effect of pellet size. Plant and Soil 45, 279–282
Prasad R and De Datta SK (1979) Increasing fertilizer nitrogen efficiency in wetland rice. Proc Symp Nitrogen and Rice, pp 456–484. Manila, Philippines: IRRI
Savant NK and De Datta SK (1979) Nitrogen release patterns from deep placement sites of urea in a wetland rice soil. Soil Sci Soc Am J 43, 131–134
Vlek PLG, Byrnes BH and Craswell ET (1980) Effect of urea placement on leaching losses of nitrogen from flooded rice soils. Plant and Soil 54, 441–449
Working team on ammonium bicarbonate (1974) Pilled ammonium bicarbonate, its fertility evaluation and producing technology. Soils (a bimonthly journal published in Chinese) 3, 91–96. Nanjing, China: Institute of soil science
Wu Jun-gui and Lou De-ren (1978) Studies on increasing fertilizer nitrogen efficiency. Soils and fertilizers (a bimonthly journal published in Chinese) 5, 20–24. Beijing, China: Institute of Soils and Fertilizers, Chinese Academy of Agricultural Sciences
Zhu Zhao-liang, Chen Rong-ye, Xu Yong-fu, Xu Yin-hua and Zhang Shao-lin (1979) The effect of forms and methods of placement of nitrogen fertilizer on the characteristics of the nitrogen supply in paddy soils. Acta Pedologica Sinica 16, 218–233
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Chen, RY., Zhu, ZL. Characteristics of the fate and efficiency of nitrogen in supergranules of urea. Fertilizer Research 3, 63–71 (1982). https://doi.org/10.1007/BF01063409
Issue Date:
DOI: https://doi.org/10.1007/BF01063409