| The establishment of soil nutrient abundance and fertilizer recommendation index system for summer maize in Guanzhong Irrigation Areas, Shaanxi Province |
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| DOI：10.7606/j.issn.1000-7601.2010.01.17 |
| Key Words: Guanzhong areas soil nutrients abundance index fertilization recommendation |
| Author Name | Affiliation | | FU Yingying | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | TONG Yanan | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | ZHAO Zuoping | Shaanxi University of Technology, Hanzhong, Shaanxi, 723001, China | | LI Wenxiang | Soil and Fertilizer Station of Shaanxi Province, Xi'an, Shaanxi 710003, China | | CAO Shumiao | Center for The Population of Advance Agritechnics of Weicheng, Xianyang, Shaanxi 712000, China | | WANG Liuhao | College of Forestry Vocation, He'nan University of Science and Technology, Luoyang, He'nan 471002, China |
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| Abstract: |
| The establishment of soil nutrient abundance index, especially in the county level, is the base of soil testing and fertilizer rec
ommendation. From 2006 to 2008, 66 “3414” field experiments of summer maize were conducted in the counties of Chencang, Wugong, Gaoling, Fufeng and Zhouzhi of Guanzhong Irrigation Areas, Shaanxi Province. The correlation between the concentration of soil available nutrient and the corresponding relative yield of summer maize in different fertility levels was analyzed, soil nutrient abundance index of Guanzhong irrigation areas was established initially; and fertilizer effect functions were applied to calculate the average optimum fertilizer rates of different fertility levels. The results indicate that nitrogen fertilizer rates (N) are 200～225 kg/hm2, 165～195 kg/hm2 and 140～160 kg/hm2 when soil fertility are classified as low (<55 mg/kg), medium (55～100 mg/kg) and high (100～120 mg/kg); phosphorus fertilizer rates (P2O5) are 90～100, 50～80, 30～50 kg/hm2 and 15～25 kg/hm2 when soil fertility are classified as low (<10 mg/
kg), medium (10～25 mg/kg), high (25～40 mg/kg) and very high(>40 mg/kg); potassium fertilizer rates (K2O) are 70～90 kg/hm2, 30～50 kg/hm2 when soil fertility are classified as high (110～200 mg/kg) and very high (>200 mg/kg). |
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