| Cite this article: | 马小茗,李瑞平,闫志远,等.基于Landsat遥感数据的河套灌区地下水对不同作物生长影响及其阈值研究 [J].灌溉排水学报,2022,():-. |
| maxiaoming,liruiping,yanzhiyuan,et al.基于Landsat遥感数据的河套灌区地下水对不同作物生长影响及其阈值研究 [J].灌溉排水学报,2022,():-. |
|
| |
|
|
| This article has been：Browse 477Times Download 0Times |
|
|
|
| DOI： |
|
| Study on the effect of groundwater on different crop growth and its threshold in Hetao Irrigation area based on Landsat remote sensing data |
|
maxiaoming1, liruiping1, yanzhiyuan1, lixinlei1, lizhengzhong2, panhongmei2
|
|
1.Inner Mongolia Agricultural University;2.Sand-trench test station of Jiefang Sluice Sub-center of water Conservancy Development Center of Hetao Irrigation District, Inner Mongolia
|
| Abstract: |
| Abstract: 【Objective】To explore the influence of groundwater depth and salinity on crop growth, and to obtain the suitable groundwater depth range and groundwater salinity threshold for crop growth.【method】In hetao irrigation district liberation brake irrigation region as the research object, using the decision tree classification analytical liberation brake irrigation field planting structure, the kriging interpolation method is adopted to regional groundwater depth data processing, on the same embedded depth of groundwater of NDVI due to calculate average graph, using sampling point of groundwater salinity and corresponding NDVI to draw a scatter diagram, The groundwater buried depth and salinity threshold of suitable crop planting area in Jiefangzha irrigation area of Hetao irrigation area were determined by combining the two rates.【Results】(1) The groundwater depth suitable for maize growth in the study area at jointing stage, heading stage and filling stage was 1.2~1.7 m, 1.3~1.8 m and 1.3~1.8 m, respectively; At jointing stage, heading stage and filling stage, the groundwater depth suitable for wheat growth was 1.1~1.5m, 1.1~1.5m and 1.2~1.7m, respectively. The suitable groundwater depth range of sunflower bud stage and filling stage is 1.1~1.6m and 1.2~1.7m, respectively. (2) The threshold of groundwater salinity suitable for crop growth in the study area is 6g/L; TDS≤3g/L is the most suitable for vegetation growth. 3g/L TDS>6g/L is basically not suitable for crop growth.【Conclusion】Groundwater depth and salinity should be controlled in a suitable range for crop growth by controlling irrigation amount, and the influence of groundwater on crop growth should be reduced. |
| Key words: NDVI; Crop growth; Hetao Irrigation area; Groundwater depth; Groundwater salinity |
|
|
|
|
|
|
