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作者	单位
付莹莹1，同延安1，李文祥2，赵佐平1，王留好3	1. 西北农林科技大学资环学院，陕西杨凌 712100； 2. 陕西省土壤肥料工作站，陕西西安 710003； 3. 河南科技大学林业职业学院，河南洛阳 471002

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中文摘要:

为给陕西关中地区小麦合理施肥提供科学依据，2006-2008年在陕西关中灌区进行了多点冬小麦“3414”田间试验，分析了不同土壤肥力水平下冬小麦土壤有效养分含量与相对产量的相关性，并依此确定土壤养分等级和推荐施肥量。结果表明，关中灌区小麦田土壤碱解氮含量等级可划分为低（<60 mg/kg）、中（60~100 mg/kg）、高（100~120 mg/kg）和极高（>120 mg/kg）；速效磷含量可划分为低（<10 mg/kg）、中（10~30 mg/kg）、高（30~45 mg/kg）和极高（>45 mg/kg）；速效钾含量分为高（100~165 mg/kg）和极高（>165 mg/kg）。当土壤碱解氮含量处于低、中、高等级时，氮肥推荐用量分别为155~175、135~155、125~135 kg/ha，极高等级的推荐施氮量未能确定；当土壤速效磷含量处于低、中、高和极高等级时，磷肥（P2O5）推荐用量分别为120~140、90~115、70~90和60~70 kg/ha；当土壤速效钾含量处于高和极高时，钾肥（K2O）推荐用量为50~80和15~35 kg/ha。

英文摘要:

The establishment of soil nutrient abundance index, especially in county level, is the base of soil testing and fertilizer recommendation. From 2006 to 2008, 72 field experiments of winter wheat “3414” were conducted in Chencang, Wugong, Gaoling, Fufeng and Zhouzhi county of Guanzhong area, Shaanxi province, the correlation between the concentration of soil available nutrient and the corresponding relative yield of winter wheat in different fertility levels was analyzed, soil nutrient abundance indexes of Guanzhong irrigation area was established initially, and fertilizer effect functions were applied to calculate the average optimum yields at different fertility levels. The results indicated that the nitrogen fertilizer rates (N) were 155~175, 135~155 and 125~135 kg/ha when soil fertility were classified as low (<60 mg/kg), medium (60~100 mg/kg) and high (100~120 mg/kg); phosphorus fertilizer rates (P2O5) were120~140, 90~115,70~90 and 60~70 kg/ha when soil fertility were classified as low (<10 mg/kg), medium (10~30 mg/kg), high (30~45 mg/kg) and very high (>45 mg/kg); potassium fertilizer rates (K2O) were 50~80, 15~35 kg/ha when soil fertility were classified as high (100~165 mg/kg) and very high (>165 mg/kg).

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