| 引用本文: | 许海婷,朱永华,吕海深,等.基于适宜土壤水分阈值的淮北平原冬小麦土壤水分时空变化特征分析[J].灌溉排水学报,,():-. |
| XU Haiting,ZHU Yonghua,LYU Haishen,et al.基于适宜土壤水分阈值的淮北平原冬小麦土壤水分时空变化特征分析[J].灌溉排水学报,,():-. |
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| 摘要: |
| 【目的】探讨淮北平原冬小麦生育期内土壤水分的时空变化特征，为冬小麦灌溉和田间水分管理提供科学依据。【方法】基于1992-2018年淮北平原四个测站点的土壤水分数据和适宜土壤水分阈值，采用Mann-Kendall检验法（简称M-K检验法）、滑动T检验法、克里金插值法等方法分析了淮北平原冬小麦生育期内土壤水分时空变化规律。【结果】①冬小麦全生育期10cm、20cm土层含水量呈下降趋势,而50cm土层则呈现上升趋势；10cm、20cm和50cm的土壤水分未发生突变，其变化处于正常波动范围。②冬小麦生育期内，拔节—抽穗阶段、抽穗—乳熟阶段和乳熟—成熟阶段的土壤含水量低于适宜含水量下限值出现的概率分别为38.5％、46.2％和46.2％，不利于冬小麦生长发育；而返青—拔节阶段土壤含水量均高于适宜含水量下限值，出现干旱胁迫的可能性较低。③在空间分布上，冬小麦全生育期表层土壤水分西南部最高，中部较低，而中层50cm则呈现出从南向北减少的整体态势。④在拔节—抽穗阶段，土壤水分的低值区出现在蚌埠和蒙城的概率为45.5％和50.0％，而在抽穗—乳熟阶段其概率分别为62.0％和38.1％。【结论】未来表层土壤含水量可能呈下降趋势，冬小麦生长受干旱胁迫的可能性较大，蚌埠和蒙城地区应加强冬小麦的灌溉。 |
| 关键词: 冬小麦；适宜土壤水分阈值；时空变化；淮北平原 |
| DOI： |
| 分类号:S274.3 |
| 基金项目:国家自然科学基金重点项目(41830752)；国家自然科学基金面上项目(42071033，41571015) |
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| Temporal and Spatial Distribution Characteristics of Soil Moisture in Winter Wheat in Huaibei Plain Area based on suitable Soil Moisture Threshold |
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XU Haiting1, ZHU Yonghua1, LYU Haishen1, Liu Yong1, WANG Zhenlong2
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1.College of Hydrology and Water Resources,Hohai University;2.Key Laboratory on Water Conservancy and Water Resources of Anhui Province,Anhui Huaihe River Institute of Hydraulic Research
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| Abstract: |
| [Objective] Investigate temporal and spatial variation characteristics of soil water in winter wheat growth season in Huaibei Plain, and provide scientific basis for irrigation and field water management of winter wheat.[Methods] Based on the soil water data and suitable soil water threshold of four stations in the Huaibei Plain from 1992 to 2018, the mann-Kendall test (m-K test for short), sliding T test and Kriging interpolation were used to analyze the temporal and spatial variation of soil water in the winter wheat growth season in the Huaibei Plain.[Results]①The water content in the soil layer 10cm and 20cm in the whole growth period of winter wheat decreased, while that in the soil layer 50cm increased.Soil moisture at 10cm, 20cm and 50cm did not mutate, and its change was within the normal fluctuation range.②During the growth period of winter wheat, the probability of soil water content in jointing - heading stage, heading - milk ripe stage and milk ripe -riping stage being lower than the appropriate water content limit was respectively 38.5%, 46.2% and 46.2%, which was not conducive to the growth and development of winter wheat.However, the soil water content in reviving - jointing stage is higher than the lower limit of suitable water content, and the possibility of drought stress is low.③In terms of spatial distribution, the surface soil moisture of winter wheat during the whole growth period was the highest in the southwest and lower in the middle, while the middle soil moisture content of 50cm was decreasing from south to north.④In the jointing - heading stage, the probability of the low soil moisture area in Bengbu and Mengcheng was 45.5% and 50.0%, while in the heading - milk ripe stage, the probability was 62.0% and 38.1%, respectively.[Conclusion] In the future, the surface soil moisture content may decrease, and the growth of winter wheat is more likely to be subjected to drought stress. Therefore, the irrigation of winter wheat should be strengthened in Bengbu and Mengcheng area. |
| Key words: winter wheat;suitable soil moisture threshold;temporal and spatial variation;Huaibei plain |
