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作 者:付莹莹[1] 同延安[1] 赵佐平[2] 李文祥 曹书苗 王留好[5]
机构地区:[1]西北农林科技大学资源环境学院,陕西杨凌712100 [2]陕西理工学院,陕西汉中723001 [3]陕西省土壤肥料工作站,陕西西安710003 [4]陕西省咸阳市渭城区农技推广站,陕西咸阳712000 [5]河南科技大学林业职业学院,河南洛阳471002
出 处:《干旱地区农业研究》2010年第1期88-93,共6页Agricultural Research in the Arid Areas
基 金:国家科技支撑计划:西北退化耕地地力恢复技术模式研究与示范(2006BAD05B07);西北干旱区高效施肥关键技术研究与示范(2008BADA4B09)
摘 要:2006-2008年,在陕西关中灌区的陈仓区、武功县、高陵县、扶风县、周至县共布置了66个夏玉米"3414"田间试验,分析了不同肥力水平下夏玉米土壤有效养分含量与相对产量的相关关系,建立了关中灌区夏玉米的丰缺指标体系; 并利用肥料效应函数计算出了不同肥力水平下的平均推荐施肥量。结果表明,当土壤碱解氮含量处于低(〈55 mg/kg)、中(55-100 mg/kg)和高(100-120 mg/kg)等级时,氮肥(N)用量分别为200-225、165-195 kg/hm^2和140-160 kg/hm^2; 当土壤速效磷含量处于低(〈10 mg/kg)、中(10-25 mg/kg)、高(25-40 mg/kg)和极高(〉40 mg/kg)等级时,磷肥(P2O5)用量分别为90-100、50-80、30-50 kg/hm2和15-25 kg/hm^2; 当土壤速效钾含量处于高(110-200 mg/kg)、极高(〉200 mg/kg)等级时,钾肥(K2O)用量为70-90 kg/hm^2和30-50 kg/hm^2。The establishment of soil nutrient abundance index, especially in the county level, is the base of soil testing and fertilizer recommendation. From 2006 to 2008, 66 "3414" field experiments of summer maize were conducted in the counties of Cheneang, 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/hm^2, 165 - 195 kg/hm^2 and 140 - 160 kg/hm^2 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/hm^2 and 15 - 25 kg/hm^2 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/hm^2, 30 -50 kg/hm^2 when soil fertility are classified as high (110 - 200 mg/kg) and very high ( 〉 200 mg/kg).
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