| 引用本文: | 王振业,李楠,肖靖秀,等.水氮互作影响间作玉米养分吸收累计和分配[J].灌溉排水学报,2025,():-. |
| wangzhenye,li nan,xiao jing xiu,et al.水氮互作影响间作玉米养分吸收累计和分配[J].灌溉排水学报,2025,():-. |
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| 摘要: |
| 【目的】明确水分和施氮对间作玉米生长的影响，探究不同水氮条件下间作玉米不同时期根茎叶的养分分配情况，为合理利用间作措施提高资源利用效率提供依据。【方法】本研究通过田间试验，常规施肥的玉米单作和玉米大豆间作产量变化;盆栽试验，玉米单作和玉米大豆间作2种种植模式，75mg/kg（氮胁迫N1）、150mg/kg（正常施氮N2）2个施氮水平，土壤含水量18%（水分胁迫W1）、24%（正常供水W2）2个水分水平来探究水氮互作对间作玉米成熟期根茎叶养分积累和分配的影响。【结果】田间试验中，与单作相比，间作显著提升玉米产量24%。在盆栽试验中，水氮胁迫下，间作玉米大豆水分当量比为1.559比常规水氮条件下显著提升14.9%。与单作相比间作玉米，在各个处理中生物量积累，养分含量都有显著提高。其中在N1W2处理下的间作玉米增产效果最好，根生物量积累显著提升86%，氮钾质量占比显著提高54%、69%；茎生物量积累显著提升51%，氮磷钾质量占比显著提高34%、84.6%、58%，氮钾比显著降低19%；叶生物量积累显著提升39%，氮磷钾质量占比显著降低25%、46.9%、58%，氮钾比显著提高15.7%。【结论】水氮互作通过影响间作玉米的水分利用效率和养分吸收分配实现比单作玉米更高的生物量积累。N1W2处理有利于间作玉米的生物量积累。 |
| 关键词: 水氮互作;玉米;间作;养分分配 |
| DOI：10.13522/j.cnki.ggps.2025197 |
| 分类号:S565 |
| 基金项目:国家重点研发计划项目(2022YFD1901500)。 |
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| Interactive Effects of Water and Nitrogen on Nutrient Uptake, Accumulation, and Partitioning in Intercropped Maize |
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wangzhenye, li nan, xiao jing xiu, tang li, zheng yi
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College of Resources and Environmental Science, Yunnan Agricultural University
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| Abstract: |
| 【Objective】To clarify the effects of water and nitrogen application on the growth of intercropped maize, and to investigate the nutrient partitioning in roots, stems, and leaves at different growth stages under varying water-nitrogen regimes. This study aims to provide a theoretical basis for optimizing intercropping practices to enhance resource-use efficiency. 【Methods】This study investigated the effects of water and nitrogen interaction on nutrient accumulation and distribution in the roots, stems, and leaves of intercropped maize at maturity stage through field and pot experiments. In the field experiment, the yield variations between conventional fertilized maize monoculture and maize-soybean intercropping were examined. The pot experiment involved two planting patterns (maize monoculture and maize-soybean intercropping), two nitrogen levels (75 mg/kg, representing nitrogen stress N1, and 150 mg/kg, representing normal nitrogen application N2), and two water levels (18% soil moisture content for water stress W1 and 24% for normal water supply W2).【Result】In the field experiment, intercropping significantly increased maize yield by 24% compared to monoculture. Under water and nitrogen stress conditions in the pot experiment, the maize-soybean intercropping system achieved a water equivalent ratio (WER) of 1.559, representing a significant 14.9% improvement over conventional water and nitrogen conditions. Compared to monoculture, intercropped maize showed significantly enhanced biomass accumulation and nutrient content across all treatments. The most pronounced yield improvement was observed under the N1W2 treatment (low nitrogen with adequate water), where root biomass accumulation increased significantly by 86%, with nitrogen and potassium content rising by 54% and 69% respectively. Stem biomass accumulation increased by 51%, accompanied by 34%, 84.6% and 58% increases in nitrogen, phosphorus and potassium content respectively, while the nitrogen-potassium ratio decreased by 19%. Leaf biomass accumulation grew by 39%, although nitrogen, phosphorus and potassium content decreased by 25%, 46.9% and 58% respectively, with the nitrogen-potassium ratio increasing by 15.7%.【Conclusion】The interaction between water and nitrogen significantly enhanced biomass accumulation in intercropped maize compared to monoculture, primarily by improving water use efficiency and optimizing nutrient uptake and allocation. Among all treatments, the N1W2 condition (low nitrogen with adequate water) proved most favorable for biomass accumulation in the maize-soybean intercropping system. |
| Key words: water and nitrogen regulation; maize; intercropping; nutrient partitioning |
