| Nitrogen phosphorus and potassium combination influence and its model analysis of the Znathoxylum bungeananum |
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| DOI：10.7606/j.issn.1000-7601.2005.06.24 |
| Key Words: Znathoxylum bungeananum fertilizer combination model |
| Author Name | Affiliation | | ZHANG Guo-zheng | College of Resources and Environmental Sciences,Northwest Science and Technology University of Agriculture and Forestry,Yangling Shaanxi,712100,China；Yangling Vocational ＆ Technology College,Yangling,Shaanxi 712100,China | | LI Shi-qing | College of Resources and Environmental Sciences,Northwest Science and Technology University of Agriculture and Forestry,Yangling Shaanxi,712100,China； State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau,Institute of Soil and Water Conservation,Chinese Academy of Science and Ministry of Water Resources |
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| Abstract: |
| Its first step was studied with the simplex centroid design the effects in the combination of nitrogen phosphorus and potassium fertilizer on yield of the Znathoxylum Bungeananum.According to the data obtained,a mathematical model was established,in which N、 P、 K were variables,the skin and seed of the Z.Bungeananum were dependent variables.The data reduction analysis showed that the effect of fertilizer combination is that high K and low P and low N |
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