| 引用本文: | 杨志红,麻旭霞,程玉臣,等.灌水频率对河套灌区密植玉米产量及水分利用效率的影响[J].灌溉排水学报,2026,45(9):20-27. |
| Yang Zhihong,Ma Xuxia,Cheng Yuchen,et al.灌水频率对河套灌区密植玉米产量及水分利用效率的影响[J].灌溉排水学报,2026,45(9):20-27. |
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| 摘要: |
| 【目的】探究覆膜滴灌灌水频率对河套灌区沙土农田密植春玉米生长发育、水分利用效率及产量形成的调控作用。【方法】以密植春玉米为研究对象，设置灌溉定额为6 000 m3/hm2，灌水次数分别为20次（W1）、15次（W2）、10次（W3），以当地农户6 375 m3/hm2灌溉量及灌溉方式为对照（CK），研究灌水频率对沙土农田密植春玉米籽粒产量及水分利用效率（WUE）影响。【结果】中等灌水频率（W2）处理玉米株高、叶面积指数（LAI）均在灌浆期最高，分别为297.67 cm和2.62；W2处理玉米水分利用效率、干物质量积累及籽粒产量最优，与CK相比，W2处理通过显著提高水分利用效率，促进了干物质量积累，进而实现了较高的籽粒产量（19 820.09 kg/hm2）。【结论】在沙土农田密植条件下，中等灌水频率（W2）可有效改善土壤水分供应，促进植株生长，提高干物质积累量，提升玉米水分利用效率和籽粒产量。W2处理可作为河套灌区沙土农田春玉米的优选灌溉模式。 |
| 关键词: 灌水频率；沙土农田；春玉米；水分利用效率；产量 |
| DOI：10.13522/j.cnki.ggps.2025384 |
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| Effects of irrigation frequency on yield and water use efficiency of densely planted maize in sandy soils of the Hetao Irrigation District |
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Yang Zhihong, Ma Xuxia, Cheng Yuchen, Qu Yan, Wei Shuli,
Liu Jiawei, Wu Jiale, Zhao Kun, Chen Liyu
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1. Plant Protection Institute, Inner Mongolia Academy of Agriculture & Animal Husbandry Sciences, Hohhot 010031, China;
2. College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China;
3. Key Laboratory of Black Soil Conservation and Utilization of Ministry of Agriculture and Rural Affairs/Key Laboratory of
Ecological Restoration and Pollution Control of Degraded Farmland of Inner Mongolia Autonomous Region,
Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot 010031, China
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| Abstract: |
| 【Objective】Sandy soils have high hydraulic conductivity and low water-holding capacity, making irrigation management essential for achieving high and stable crop yields in such soils. Here, we experimentally investigated the effects of irrigation frequency under mulched drip irrigation on growth, water-use efficiency (WUE), and yield formation of densely planted spring maize in sandy soils of the Hetao Irrigation District.【Method】The experiment was conducted in a spring maize field with a total irrigation amount of 6 000 m3/hm2, applied at three irrigation frequencies: 20 events (W1), 15 events (W2), and 10 events (W3). Conventional irrigation practiced by local farmers, with an irrigation amount of 6 375 m3/hm2, was used as the control (CK). During the experiment, we measured plant height, leaf area index (LAI), dry matter accumulation, water consumption, WUE and grain yield.【Result】Under the moderate irrigation frequency (W2), plant height and LAI reached their highest values at the grain-filling stage, at 297.67 cm and 2.62, respectively. W2 showed the best overall performance in WUE, dry matter accumulation, and grain yield. Compared with CK, W2 increased WUE and promoted dry matter accumulation, resulting in a grain yield of 19 820.09 kg/hm2, the highest among all treatments.【Conclusion】Under densely planted spring maize in sandy soil, applying 6 000 m3/hm2 of irrigation water in 15 events improved soil water availability, promoted plant growth and canopy development, enhanced dry matter accumulation, and increased WUE and grain yield. Thus, W2 was the optimal irrigation strategy for densely planted spring maize under mulched drip irrigation in the sandy soils of the Hetao Irrigation District. |
| Key words: irrigation frequency; sandy farmland; spring maize; water use efficiency; grain yield |
