[1]ZHANG Bo,PEI Xingyun,CAO Hua,et al.Spatial and Temporal Characteristics Characteristics of Flue-Cured Tobacco Water Requirement and Irrigation Requirement Index in Guizhou Province[J].Research of Soil and Water Conservation,2019,26(05):215-221.
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Spatial and Temporal Characteristics Characteristics of Flue-Cured Tobacco Water Requirement and Irrigation Requirement Index in Guizhou Province
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 05
Page number:
215-221
Column:
Public date:
2019-09-06
- Title:
- Spatial and Temporal Characteristics Characteristics of Flue-Cured Tobacco Water Requirement and Irrigation Requirement Index in Guizhou Province
- Keywords:
- flue-cured tobacco; water demand; effective precipitation; irrigation demand index; Guizhou Province
- CLC:
- S572
- DOI:
- -
- Abstract:
- In order to configure the irrigation plan for flue-cured tobacco properly and improve the efficiency of water use, based on the daily meteorological data of 81 meteorological stations in Guizhou during the past 55 years, the effective precipitation and water requirement in different growth stages of flue-cured tobacco in Guizhou were calculated by an effective precipitation recommended by the USDA soil conservation agency and a reference crop evapotranspiration and the United Nations Food and Agriculture Organization, and the variation characteristics of irrigation demand index of flue-cured tobacco in different growth stages were analyzed. The results showed that, in the past 55 years, the effective precipitation amounts during the root extending, vigorous, mature periods and field growth period of flue-cured tobacco in Guizhou Province were 26.9~75.4 mm, 45.2~88.9 mm, 66.4~167.6 mm and 152.8~284.8 mm, respectively; the water requirements were 51.9~78.8 mm, 148.8~202.2 mm, 85.2~122.8 mm and 332.5~412.6 mm respectively, and the water requirement of vigorous period was the highest; the average annual irrigation demand indexes were 0.20, 0.32, 0.26 and 0.35, respectively; the effective precipitation and water demand of flue-cured tobacco showed a decreased trend with time, and the irrigation demand index showed an increased trend during the root-extension period. The irrigation demand indexes showed a decreasing trend in other growth periods. With respect to the spatial distribution, the effective precipitation in the root extending period of flue-cured tobacco decreased from east to west; the trend of the irrigation demand index in the root extending and the vigorous period decreased from the southwest to the northeast, while it showed opposite tendency in mature period and field growth period.
- References:
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