| 张伟,段志平,郝向东,林海荣,王宝驹,甘雅文,李鲁华.和田枣树/小麦系统氮素吸收利用差异研究[J].干旱地区农业研究,2018,36(5):149~154 |
| 和田枣树/小麦系统氮素吸收利用差异研究 |
| Differences of absorption and utilization for nitrogen in jujube tree/wheat agroforestry system in Hetian |
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| DOI：10.7606/j.issn.1000-7601.2018.05.22 |
| 中文关键词: 枣树 小麦 氮素 吸收利用差异 |
| 英文关键词:jujube tree wheat nitrogen the differences of absorption and utilization |
| 基金项目:国家自然科学基金(31460335);国家自然科学基金(31560376);中国博士后科学基金资助项目（2015M582737）;石河子大学高层次人才科研启动资金(RCZX201422) |
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| 中文摘要: |
| 通过田间试验，研究和田地区枣树/小麦系统对氮素的吸收利用以及复合群体对不同土壤深度土壤矿质氮素吸收的差异，阐明复合系统对氮素高效利用的空间生态位补偿机制。以骏枣和新冬20号为实验材料，利用15N同位素标记法研究复合系统氮素的吸收利用。间作体系的N吸收量、NDFF、氮素利用效率较单作加权平均值高；枣树的氮素利用率低于小麦；各系统的氮素利用率最低值均出现在15N施入的120、200 cm处理；针对枣树/小麦复合系统内的氮素种间竞争，建议在田间管理中增施一定肥料以助于缓解这种氮素竞争。 |
| 英文摘要: |
| Field experiments were conducted to investigate differences of nitrogen acquisition, and utilization in soil depths, and clarify the compensatory mechanism of space niche for efficiently utilizing nitrogen in jujube tree/wheat intercropping system. Junzao-winter wheat No.20 intercropping system was tested and its nitrogen acquisition and utilization were determined by 15N stable isotope labeling The results showed intercropping system with higher nitogen acquisition,NDFF and nitrogen use effecency〓than which weighted average of mono cropping system.Nitrogen use effecency of jujube tree was lower than which of wheat. The lowest value of UFN in all treatments were observed at the imbedding depths of 120 and 200 cm of 15N. The findings suggest fertilizing in the system to mitigate nitrogen competition between jujube tree and wheat. |
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