Pedosphere 9(1): 77--82, 1999
ISSN 1002-0160/CN 32-1315/P
©1999 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Nutritive equilibrium in rice plant populations for high yield |
| WANG Bo-Lun, LIU Xin-An, YU Gui-Rui, SU Zheng-Shu and WANG Su |
| Shenyang Agricultural University, Shenyang 110161 (China) |
| ABSTRACT |
| The effects of nitrogen, phosphorus and potassium application level, seed rate and transplanting density on the growth and development of rice plants were studied to find out nutrient status in high-yielding rice plants and to increase grain yield by adequate fertilization. There was an equilibrium relationship among nutrient elements for high-yielding rice plant populations. The equilibrium index of nutrient amount, content and distribution in high-yielding rice plants should be generally greater than -2 but less than 2. The optimum nutritive proportion of nitrogen : phosphorus : potassium assimilated by the plants was about 10 : 2 : 9 at the ripening stage. But the content and the proportion varied with the growth stages. Therefore, the nutrient in rice plant populations should be in a dynamic equilibrium, so as to achieve high yield. |
| Key Words: high yield, nutritive equilibrium, rice plant populations |
| Citation: Wang, B. L., Liu, X. A., Yu, G. R., Su, Z. S. and Wang, S. 1999. Nutritive equilibrium in rice plant populations for high yield. Pedosphere. 9(1): 77-82. |
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