[1]WANG Fang,ZHANG Yu,LIANG Jing.Changes of Soil Moisture in Sanjiang Plain and Its Response to Meteorological Condition[J].Research of Soil and Water Conservation,2020,27(05):172-176.
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Changes of Soil Moisture in Sanjiang Plain and Its Response to Meteorological Condition
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 05
Page number:
172-176
Column:
目次
Public date:
2020-08-20
- Title:
- Changes of Soil Moisture in Sanjiang Plain and Its Response to Meteorological Condition
- Keywords:
- climate change; soil; relative humidity; Sanjiang Plain; M-K Mutation test
- CLC:
- P467
- DOI:
- -
- Abstract:
- It is of great significance to make full use of soil moisture resources and cope with climate change to understand the spatiotemporal variation characteristics and rules of soil moisture. Based on the data of soil moisture, temperature and precipitation of 23 agricultural weather stations in Sanjiang Plain during the period from 1982 to 2017, the trend variation characteristics of soil moisture in the land(0—50 cm)and its relationship with temperature and precipitation climate factors were analyzed by using statistical analysis, M-K mutation test and other methods. The results showed that:(1)in the past 37 years, the relative humidity of 0—30 cm and 40—50 cm soil in Sanjiang Plain presented a significant trend of decrease and stage change, and the mutation occurred in the year of 1997, but there was no significant change in the layer of 30—40 cm; in the vertical direction, the soil relative humidity in the middle layer(30—40 cm)was the largest, and soil relative humidity in the upper and lower layers presented the decreasing trend; the spatial distribution of soil relative humidity was different, and the soil relative humidity decreased from north to south and from east to west;(2)the degree of influence of temperature and precipitation on soil relative humidity in Sanjiang Plain was different; the relative humidity of 0—20 cm soil in the shallow layer was mainly affected by temperature and precipitation from April to September growing season, while the relative humidity of layer(20—30 cm)and the layer(40—50 cm)were affected by temperature and precipitation, respectively, in the growing season from April to September; however, the relative humidity of the layer(30—40 cm)was not affected by air and precipitation. All in all, there are differences in soil relative humidity in Sanjiang Plain in recent 37 years. The relative humidity of each layer was in relatively high(wet), lower(normal)and higher(wet)stages after 1982—1996, 1997—2013 and 2014, respectively. The temperature and precipitation in the growing season from April to September are the main meteorological factors affecting the soil relative humidity in Sanjiang Plain.
- References:
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Last Update:
2020-08-25