| Double variables analysis of nitrogen and phosphorus fertilizer effects in wheat/soybean intercropping system |
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| DOI：10.7606/j.issn.1000-7601.2007.04.35 |
| Key Words: double variables analysis wheat/soybean intercropping complementary effects yield component |
| Author Name | Affiliation | | SUN Jian-hao | Institute of Soil and Fertilizers, Gansu Academy of Agricultural Sciences, Lanzhou 730070
Key Laboratory of Plant and Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100094, China | | LI Long | Key Laboratory of Plant and Soil Interactions of the Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100094, China | | LI Juan | Institute of Soil and Fertilizers, Gansu Academy of Agricultural Sciences, Lanzhou 730070 |
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| Abstract: |
| Double variables analysis was used to analyze nitrogen and phosphorus fertilizer effect in wheat/soybean intercropping system. Results showed that soybean yield was increased more than wheat when phosphorus fertilizer was applied while wheat yield was increased significantly and soybean yield was decreased when nitrogen fertilizer was used. Complementary effects of wheat/soybean intercropping system indicated that: when wheat yield was increased, soybean yield decreased; but when soybean yield increased, wheat yield changed little. Effect of applying nitrogen fertilizer and phosphorus fertilizer was different. Phosphorus application can enhance wheat 1000 grain weight and soybean grain number while nitrogen application can increase wheat grain number and decrease 1000 grain weight of wheat and soybean. Nitrogen and phosphorus applied together can buffer the drop of 1000 grain weight of wheat and soybean resulted from nitrogen application. |
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