种植模式对水稻根系分布与氮素吸收的影响
【目的】探究种植模式对水稻的根系特性、氮素吸收和产量的影响。【方法】以水稻为供试材料，设置移栽淹灌（TFR）、旱直播淹灌（DDSF）和旱直播干湿交替灌溉（DDSA）3种种植模式，研究不同种植模式下水稻0~20 cm土层根系形态、根系生理、氮素吸收量和产量及其相互关系。【结果】①在主要生育期，直播模式较移栽模式增加了根干物质量、根直径和0~10 cm土层根分布，减少了10~20 cm土层根系分布；DDSA处理增加了旱直播稻的根干物质量、根直径、0~10 cm土层根分布，减少了10~20 cm土层根分布；②在幼穗分化期后，直播模式降低了根系活力等指标；DDSA处理增加旱直播稻的根系活力等指标。③各...
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| Veröffentlicht in: | Guanʻgai paishui xuebao 2023-01, Vol.42 (11), p.58-82 |
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| creator | HE, Chunyu LIU Yueyue SHAO Xiwen GUO Liying TENG, Yu DU, Juan GENG Yanqiu |
| description | 【目的】探究种植模式对水稻的根系特性、氮素吸收和产量的影响。【方法】以水稻为供试材料，设置移栽淹灌（TFR）、旱直播淹灌（DDSF）和旱直播干湿交替灌溉（DDSA）3种种植模式，研究不同种植模式下水稻0~20 cm土层根系形态、根系生理、氮素吸收量和产量及其相互关系。【结果】①在主要生育期，直播模式较移栽模式增加了根干物质量、根直径和0~10 cm土层根分布，减少了10~20 cm土层根系分布；DDSA处理增加了旱直播稻的根干物质量、根直径、0~10 cm土层根分布，减少了10~20 cm土层根分布；②在幼穗分化期后，直播模式降低了根系活力等指标；DDSA处理增加旱直播稻的根系活力等指标。③各处理抽穗期和成熟期的总氮素积累量、花后氮素吸收量和产量表现为：TFR处理＞DDSA处理＞DDSF处理。移栽模式较直播模式有更深的根系分布和相对较高的根系活力，是其氮素积累量多和产量高的主要原因；旱直播干湿交替灌溉模式增加旱直播稻的深层土壤根系分布，提升了根系活力，进而促进了氮素吸收，提高了产量。【结论】综上可知，旱直播干湿交替灌溉有望提高旱直播水稻氮素利用效率及产量。 |
| doi_str_mv | 10.13522/j.cnki.ggps.2023080 |
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| subjects | Absorption Accumulation Crop yield Cultivation Flooding Flowering Nitrogen Nutrient uptake Physiology Plant growth Planting Rice Root distribution Rooting Roots Soil layers |
| title | 种植模式对水稻根系分布与氮素吸收的影响 |
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