[1]ZHANG Rui,ZHANG Gaobin,HUANG Mingbin.Dynamic Changes of Winter Wheat Yield and Water Balance Elements of Dryland in Long Time Series in the Southern Shanxi on the Loess Plateau[J].Research of Soil and Water Conservation,2023,30(02):142-148.[doi:10.13869/j.cnki.rswc.2023.02.013]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 02
Page number:
142-148
Column:
Public date:
2023-03-10
- Title:
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Dynamic Changes of Winter Wheat Yield and Water Balance Elements of Dryland in Long Time Series in the Southern Shanxi on the Loess Plateau
- Author(s):
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ZHANG Rui1, ZHANG Gaobin2, HUANG Mingbin3
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(1.College of Natural Resources and Environment, Northwest A&F University, Yangling, Shannxi 712100, China; 2.Wanrong Meteorological Bureau in Shanxi Province, Wanrong, Shanxi 044200, China; 3.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shannxi 712100, China)
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- Keywords:
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HYDRUS-1D model; dry tableland in southern Shanxi; winter wheat; water balance
- CLC:
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S512.1+1
- DOI:
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10.13869/j.cnki.rswc.2023.02.013
- Abstract:
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In order to understand the long-term yield and hydrological changes of dryland winter wheat fields in the Loess Plateau, the winter wheat grown in Wanrong County, Shanxi Province was used as the research sample to analyze the change trend of winter wheat production from 1951 to 2020 and the impact of interannual climatic fluctuations on wheat yield. At the same time, the Hydrus-1D model and the calibrated model parameters were used to simulate the changing process of each component of the field water balance elements from 1965 to 2020. The results showed that the annual average yield increase rate of winter wheat was 31.9 kg/(hm2·a), and the impact of interannual climate change on winter wheat yield was ±22.4%, among which the most significant meteorological factors were average relative humidity in growth period and annual precipitation; the determination coefficients of HYDRUS-1D model in standard period and validation period were 0.65~0.68 and 0.57~0.65, respectively; in recent 56 years, the change of transpiration in winter wheat was(176±29)mm, the evaporation was(296±28)mm, the leakage was generally less than 40 mm, and the change of soil water content was(-2±45)mm. In conclusion, the yield of winter wheat in the study area showed an upward trend in the past 70 years, and its yield fluctuated greatly due to the impact of inter-annual climate change. The Hydrus-1D model can well simulate the hydrological changes of winter wheat fields in the dryland of southern Shanxi Province, and the soil water content in winter wheat fields has been decreasing for many years.