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稻田地表径流氮素流失量数值模拟及淋失规律

稻田地表径流氮素流失量数值模拟及淋失规律

https://devfeature-collection.sl.nsw.gov.au/record/TN_cdi_proquest_journals_3098248141

稻田地表径流氮素流失量数值模拟及淋失规律

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Full title

稻田地表径流氮素流失量数值模拟及淋失规律

Publisher

Xinxiang City: Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage

Journal title

Guanʻgai paishui xuebao, 2018-01, Vol.37 (1), p.63

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Formats

Publication information

Publisher

Xinxiang City: Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage

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Scope and Contents

Contents

【目的】研究稻田氮素径流流失和淋失规律。【方法】在连续淹水条件下开展稻田野外试验,对氮素径流流失过程进行了数值模拟,同时分析了施肥前后土壤剖面氮素质量浓度分布。【结果】 施肥当天径流试验中总氮、氨态氮和硝态氮以及施肥后第18天硝态氮的径流流失质量浓度随时间的下降过程可以用幂函数拟合,而施肥后第18天总氮和氨态氮用指数函数拟合。氮素径流流失过程前期,累积流失量与累积径流量的关系曲线可用抛物线函数拟合,径流后期用抛物线函数拟合效果略好于对数函数。在连续淹水下稻田中硝态氮量很低,主要以氨态氮形式流失。上层土壤(0~30 cm)氮素量大于下层,且上层的氮素量随时间的变化幅度高于下层。【结论】 稻田氮素径流流失过程可通过初等函数拟合进行定量描述,提高根系对上层土壤氮素利用率有利于减小氮素淋失,且氮素量...

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Full title

稻田地表径流氮素流失量数值模拟及淋失规律

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Primary Identifiers

Record Identifier

TN_cdi_proquest_journals_3098248141

Permalink

https://devfeature-collection.sl.nsw.gov.au/record/TN_cdi_proquest_journals_3098248141

Other Identifiers

ISSN

1672-3317

DOI

10.13522/j.cnki.ggps.2017.0172

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