| 王改玲,郝明德,李燕敏.基于黄土旱塬区长期定位试验的施肥效益分析[J].干旱地区农业研究,2010,28(3):129~132 |
| 基于黄土旱塬区长期定位试验的施肥效益分析 |
| Analysis of the benefit of fertilizer based on long-term fertilization in dry-land of Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2010.03.23 |
| 中文关键词: 定位施肥 肥料利用率 土壤肥力 利润率 |
| 英文关键词:long-term fertilization fertilizer use efficiency soil fertility profit rate |
| 基金项目:国家重点基础研究发展计划(2009CB118604)；中国科学院知识创新工程重大项目(KSCX-YW-09-07)；山西农业大学博士启动基金 |
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| 中文摘要: |
| 以在黄土旱塬区进行了18年的长期定位试验为基础,研究了长期定位施肥对肥料利用率、土壤肥力及施肥经济效益的影响,结果表明:长期单施磷肥,对小麦无增产效果,磷肥的利用率为0.4%,磷肥的利润率平均为-1.1;单施氮肥,小麦产量明显增加,氮肥利用率为39.3%,利润率平均为3.0,最高可达4.7;氮磷配施,肥料的肥效、利用率明显高于氮、磷肥单施,利润率平均为1.7。氮磷配施还有利于土壤养分平衡,土壤肥力提高。综合考虑,氮磷配施,特别是90 kg/hm2N和90 kg/hm2P2O5配施是更理想的施肥方式。 |
| 英文摘要: |
| The effect of fertilization on fertilizer use efficiency (FUE), soil fertility and profit rate of fertilization(PR) was studied based on 18-year long-term experiment in dry-land of Loess Plateau . The results showed that:single P application didn't increase the yield of wheat, and FUE and PR of P were 0.4% and-1.1, respectively; Single N application increased the yield of wheat significantly, and FUE and PR of N were 39.3% and 3.0 respectively; Compared with single fertilization, combination of N and P increased FUE of N and P, and the average PR was 1.7, which also contributed to the balance of nutrients and the increase of soil fertility. On the whole, combination of N and P was recommended, and the fertilizer rate of 90 kg/hm2 N & 90 kg/hm2 P2O5 was the most optimum. |
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