Pedosphere 19(2): 199--207, 2009
ISSN 1002-0160/CN 32-1315/P
©2009 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Crop yield and soil responses to long-term fertilization on a red soil in southern China |
ZHANG Hui-Min1,2,3, WANG Bo-Ren1, XU Ming-Gang 1 and FAN Ting-Lu1 |
1 Key Laboratory of Plant Nutrition and Nutrient Cycling,Ministry of Agriculture of China and Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081 (China). E-mail:zhhm2007@163.com
2 Department of Resource and Environment, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100 (China)
3 Department of Agronomy, Henan University of Science and Technology, Luoyang 471003 (China) |
| ABSTRACT |
| A 15-year fertilization experiment with different applications of inorganic N, P and K fertilizers and farmyard manure (M)was conducted to study the yield and soil responses to long-term fertilization at Qiyang, Hunan Province, China. Average grain yields of wheat and corn (1 672 and 5 111 kg ha-1, respectively)for the treatment NPKM were significantly higher than those (405 and 310 kg ha-1)of the unfertilized control and single inorganic fertilizer treatments. Compared with the corresponding initial values of the experiment, all treatments showed a yield decline of 9 to 111 kg ha-1 year-1 in wheat and 35 to 260 kg ha-1 year-1 in corn, respectively, and a significant pH decline of 0.07 to 0.12 pH year-1, except for the treatments PK and NPKM. After long-term fertilization, the soil organic C, soil available P, exchangeable Ca2+ and Mg2+ and available Cu2+ and Zn2+ contents were higher in the treatment NPKM than in the treatments applied with inorganic fertilizer only. Compared to the treatment NPK, the treatment NPKM, where manure partially replaced inorganic N, had a positive impact on arresting the decline of soil pH. This improved grain yields of wheat and corn, suggesting that application of NPK fertilizer in combination with farmyard manure is important to maintain soil fertility and buffering capacity in red soil. |
| Key Words: corn, long-term fertilization, red soil, wheat, yield |
| Citation: Zhang, H. M., Wang, B. R., Xu, M. G. and Fan, T. L. 2009. Crop yield and soil responses to long-term fertilization on a red soil in southern China. Pedosphere. 19(2): 199-207. |
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