付莹莹,同延安,赵佐平,李文祥,曹书苗,王留好.陕西关中灌区夏玉米土壤养分丰缺及推荐施肥指标体系的建立[J].干旱地区农业研究,2010,28(1):88~93 |
陕西关中灌区夏玉米土壤养分丰缺及推荐施肥指标体系的建立 |
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 |
中文关键词: 陕西关中 土壤养分 丰缺指标 推荐施肥 |
英文关键词:Guanzhong areas soil nutrients abundance index fertilization recommendation |
基金项目: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) |
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中文摘要: |
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/hm2和140~160 kg/hm2;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/hm2;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/hm2和30~50 kg/hm2。 |
英文摘要: |
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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