垄作沟播对滨海盐碱土水盐变化及玉米生长的影响
文献类型: 中文期刊
关键词: 盐碱地;;种植方式;;玉米;;水盐动态;;产量
期刊名称:中国农业科学
ISSN: 0578-1752
年卷期: 2025 年
页码:
收录情况: 北大核心(2023版) ; ; CSCD(2025-2026年度) ; ; 科技核心(2024版) ; ; 农林核心(2024版)
摘要: 【目的】探究不同种植方式对土壤水盐变化及玉米产量的影响,为进一步挖掘滨海盐碱地产能提供理论依据。【方法】试验于 2022—2023 年在山东省东营滨海盐碱地进行,采用双因素裂区设计,主区为玉米品种:中试 8626(V1)和中单 8922(V2);副区为种植方式:平作(P1)、垄作垄播(P2)和垄作沟播(P3),研究种植方式对土壤水盐变化及玉米产量的影响机制。【结果】与 P1 相比,P3 处理的玉米苗期 0—40 cm 土层含水量增加 4.6%,盐分含量降低 10.3%;而 P2 处理的 0—40 cm 土层含水量降低 4.8%,盐分含量升高 11.8%。P3 处理可以显著提高苗期表层土壤含水量,降低盐分含量,从而提高玉米出苗率,其出苗率比 P1 处理提高 2.9%。与 P1 相比,P3 处理的吐丝期根系干重、根长、根表面积和根体积分别提高 18.5%、21.1%、23.1%和 26.8%;P3 处理的玉米成熟期干物质积累量、有效穗数和穗粒数比 P1 处理分别增加 10.2%、3.1%和 4.0%。品种间,V1 的出苗率比 V2 平均提高了 5.2%;与 V1 相比,V2 吐丝期的根系干重、根长、根表面积和根体积分别提高 26.9%、13.8%、7.1%和 26.0%;V2 成熟期的干物质积累量和百粒重比 V1 分别增加 7.0%和 3.8%,而 V1 的有效穗数和穗粒数比 V2 增加 5.2%和 12.4%。与 P1 和 P2 处理相比,P3 处理下 V1 玉米品种的籽粒产量分别提高 9.1%和 27.1%,V2 玉米品种的籽粒产量分别提高 10.7%和 19.0%。【结论】在本试验条件下,垄作沟播种植能改善土壤的水盐分布,有利于提高中试 8626 出苗率、穗粒数、收获指数和籽粒产量。
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