| Analysis of the benefit of fertilizer based on long-term fertilization in dry-land of Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2010.03.23 |
| Key Words: long-term fertilization fertilizer use efficiency soil fertility profit rate |
| Author Name | Affiliation | | WANG Gailing | Institute of Resource and Environment, Shanxi Agricultural University, Taigu, Shanxi 030801, China
Institule of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources，Yangling, Shannxi 712100, China | | HAO Mingde | Institule of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources，Yangling, Shannxi 712100, China | | LI Yanmin | Institule of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources，Yangling, Shannxi 712100, China |
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| Abstract: |
| The effect of fertilization on fertilizer use efficiency (FUE), soil fertility and profit rate of fertilization(PR) was studied based on 18-year long-term experiment in dry-land of Loess Plateau . The results showed that:single P application didn't increase the yield of wheat, and FUE and PR of P were 0.4% and-1.1, respectively; Single N application increased the yield of wheat significantly, and FUE and PR of N were 39.3% and 3.0 respectively; Compared with single fertilization, combination of N and P increased FUE of N and P, and the average PR was 1.7, which also contributed to the balance of nutrients and the increase of soil fertility. On the whole, combination of N and P was recommended, and the fertilizer rate of 90 kg/hm2 N & 90 kg/hm2 P2O5 was the most optimum. |
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