| 长期施肥对黄土旱塬区土壤—植物系统中氮、磷养分的影响 |
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| 引用本文： | 陈磊,郝明德,戚龙海.长期施肥对黄土旱塬区土壤—植物系统中氮、磷养分的影响[J].植物营养与肥料学报,2007,13(6):1006-1012. |
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| 作者姓名： | 陈磊 郝明德 戚龙海 |
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| 作者单位： | 1.西北农林科技大学资源环境学院 陕西杨凌712100; |
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| 基金项目： | 国家重点基础研究发展计划(973计划);中国科学院知识创新工程项目;中国科学院农业项目 |
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| 摘 要： | 对1984年建立的长期试验田,分析了2005年小麦产量、养分吸收及土壤养分变化。结果表明,单施磷肥增产25.6%,单施氮肥增产48.1%,其吸氮、磷量也相应增加,但收获指数显著低于对照;氮磷配施增产幅度为101.3%3～02.8%,养分吸收量增加显著,最佳施肥量为N2P2(N.90.kg/hm2、P.56.4.kg/hm2)。施肥明显改变了耕层土壤养分的含量,也影响了养分在土壤剖面的分布。氮磷配施是培肥土壤的有效途径,耕层土壤全磷增加了8.3%～45.2%,速效磷增加54.8%9～17.8%。中等施氮(N.90.kg/hm2)水平下,随着磷的增加,耕层土壤全磷累积和施磷量的关系为y=0.002x-0.112。速效磷含量增加和磷肥用量的关系为y=9.6537Ln(x)-35.371,施肥对60.cm以下磷素影响较小。
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| 关 键 词： | 长期定位试验 小麦 养分吸收量 土壤养分 |
| 文章编号： | 1008-505X（2007）06-1006-07 |
| 收稿时间： | 2006-11-16 |
| 修稿时间： | 2007-03-21 |
Effects of long-term fertilization on nutrient variety of soil and plant systems in dry-land of Loess Plateau |
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| CHEN Lei,HAO Ming-de,QI Long-hai.Effects of long-term fertilization on nutrient variety of soil and plant systems in dry-land of Loess Plateau[J].Plant Nutrition and Fertilizer Science,2007,13(6):1006-1012. |
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| Authors: | CHEN Lei HAO Ming-de QI Long-hai |
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| Institution: | 1.College of Natural Resource and Environment;Northwest A&F University;Yangling;Shaanxi 712100;China; |
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| Abstract: | Based on 20 years of long-term experiment of applying fertilizer on continuous wheat in dry-land of Loess Plateau.Wheat yield,nutrient uptake and soil nutrient were analyzed in year 2005.The results showed that yield was increased by 25.6% and 48.1% with single application of P and N fertilizer,respectively.The N and P uptake was increased too,but the harvest index was decreased.The combination of N and P could increase yield by 101.3%-302.8% and nutrient uptake significantly.Soil nutrient content in surface soil(020 cm) and the distribution of nutrient in soil layer varied.The combination of N and P was an effective ways to soil fertility management.Total P and available P in soil increased by 8.3%-45.2% and 54.8%-917.8%,respectively.The relation between total P accumulation and the amount of P fertilizer applied was y = 0.002x-0.112,and the relation between available P and the amount of P fertilizer applied was y = 9.6537 ln(x)-35.371.The difference was not that significant in subsoil layer. |
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| Keywords: | wheat long-term application of fertilizer yield fertilizer use efficiency |
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