Pedosphere 12(3): 265--274, 2002
ISSN 1002-0160/CN 32-1315/P
©2002 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Fertilization for high yields in corn-sweet potato-wheat rotation: A systematic approach to nutrient limiting factors of soils in Chongqing, China |
| HE Tian-Xiu1, WU De-Yi2, HE Cheng-Hui1, TU Shi-Hua3, WU Guang-Quan1, WU Wang-Cheng4, KONG Sheng1 and WANG Ji-Peng1 |
1 Southwest Agricultural University, Chongqing 400716 (China)
2 Shanghai Jiaotong University, Shanghai 200000 (China)
3 Institute of Soil and Fertilizer, Sichuan Academy of Agricultural Sciences, Chengdu 610066 (China)
4 Agricultural Bureau of Beibei District, Chongqing 400100 (China) |
| ABSTRACT |
| A systematic approach was adopted to investigate the nutrient limiting factors in gray-brown purple soils and yellow soils derived from limestone in Chongqing, China, to study balanced fertilization for corn, sweet potato and wheat in rotation. The results showed that N, P and K were deficient in both soils, Cu, Mn, S and Zn in the gray-brown purple soils and Ca, Mg, Mo and Zn for the yellow soils. Balanced fertilizer application increased yields of corn, sweet potato and wheat by 28.4%, 28.7% and 4.4%, respectively, as compared to the local farmers' practice. The systematic approach can be considered as one of the most efficient and reliable methods in fertility study. |
| Key Words: balanced fertilization, high yield, nutrient limiting factors, systematic approach |
| Citation: He, T. X., Wu, D. Y., He, C. H., Tu, S. H., Wu, G. Q., Wu, W. C., Kong, S. and Wang, J. P. 2002. Fertilization for high yields in corn-sweet potato-wheat rotation: A systematic approach to nutrient limiting factors of soils in Chongqing, China. Pedosphere. 12(3): 265-274. |
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