| 引用本文: | 刘继龙,刘璐,付强,等.黑土区玉米地土壤温度的时空变异性研究[J].灌溉排水学报,2019,38(1):31-35. |
| LIU Jilong,LIU Lu,FU Qiang,et al.黑土区玉米地土壤温度的时空变异性研究[J].灌溉排水学报,2019,38(1):31-35. |
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| 摘要: |
| 【目的】研究农田土壤温度的时空变异机理。【方法】以哈尔滨市向阳试验基地一块面积为96 m×96 m的农田为研究对象（共设置32个测点），利用传统统计学与地统计学方法，分析了黑土区玉米地不同生育时期土壤温度的空间变异性。【结果】随生育时期变化，不同深度的土壤温度平均值先增后减；不同深度土壤温度的空间变异性均为弱变异，不同深度土壤温度变异程度的变化趋势有所差异，5 cm深度变异程度的变化趋势不明显，10 cm和25 cm深度先增后降，15 cm和20 cm深度逐渐降低；土壤温度的空间相关范围在10、15、20 cm和25cm深度先增后减，土壤温度在玉米灌浆期5 cm深度与拔节期10 cm深度具有中等空间相关性，其他生育时期及不同深度具有强烈的空间相关性，5 cm和15 cm深度空间相关性变化趋势不明显，10 cm和20 cm深度先增后减，25 cm深度先减后增。【结论】土层深度和时间对研究区域土壤温度的空间变异性具有明显影响。 |
| 关键词: 黑土区； 农田； 土壤温度； 时空变异性； 玉米 |
| DOI：10.13522/j.cnki.ggps.20180074 |
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| Spatiotemporal Variation of Soil Temperature within a Corn Field in Black Soil |
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LIU Jilong, LIU Lu, FU Qiang, ZHANG Lingling, LI Jiawen, TAN Siyuan
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1. School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China；2. Key Laboratory of Effective Utilization of Agricultural Water Resources, Ministry of Agriculture, Harbin 150030, China；3. College of Science, Northeast Agricultural University, Harbin 150030, China
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| Abstract: |
| 【Objective】 The aim of this work is to unravel the mechanisms underlying the spatiotemporal variation of soil temperature within a corn field grown in the black soil in north China in attempts to provide guidance to agronomical management. 【Method】 The experiment was conducted in a 96 m×96 m plot of corn field in Xiangyang experimental site in Harbin, Heilongjiang province. There were 32 observation points in the plot, from which we measured the change in soil temperature at different growth stages and then analyzed the data statistically.【Result】 During the growth season, the mean soil temperature at different depths increased firstly followed by an decrease. Temporal variation in the temperature depends on soil depth, with the temperature at 5 cm remaining almost unchanged while those at 10 cm and 25 cm depth increasing first followed by a decrease; the spatial correlation of soil temperature existed medium spatial correlation at the filling stage on 5 cm soil depth and the jointing stage on 10 cm soil depth, and it had strong spatial correlation on the other stages, the tendency to change the spatial variability of soil temperature was no obvious on 5 cm and 15 cm soil depth, increased firstly then decreased on 10 cm and 20 cm soil depth, and decreased firstly then increased on 25 cm soil depth. 【Conclusion】The soil depth and time have significant influence on the spatial variability of soil temperature in the research area. |
| Key words: black soil region; farmland; soil temperature; spatial and temporal variability |
