LIU Xuchen, MA Shoutian, HUANG Chao, et al. Spatial and Temporal Distribution of Water Requirement and Water Deficiency of Summer Maize in Huang-Huai-Hai Plain[J]. 2023, 37(2): 179-186.
DOI:
LIU Xuchen, MA Shoutian, HUANG Chao, et al. Spatial and Temporal Distribution of Water Requirement and Water Deficiency of Summer Maize in Huang-Huai-Hai Plain[J]. 2023, 37(2): 179-186. DOI: 10.13870/j.cnki.stbcxb.2023.02.021.
Spatial and Temporal Distribution of Water Requirement and Water Deficiency of Summer Maize in Huang-Huai-Hai Plain
For improving plain irrigation efficiency of summer maize and optimize the allocation of agricultural resources in the Huang-Huai-Hai
based on the statistical data of 70 a of experiments at 27 plain site
the crop water requirement model
rainfall frequency analysis and crop coefficient
on the basis of relevant theories
the spatial and temporal distribution of water demand and water deficiency (i.e.water needed for supplementary irrigation) of summer corn in different hydrological years were analyzed.Firstly
according to the annual rainfall data of each representative point
four hydrological annual patterns with rainfall frequency of 25%
50%
75%
95% and their corresponding effective rainfall were determined by using the Pearson-Ⅲ curve.Secondly
the Penman-Monteith model was used to calculate the reference crop water requirement
and the crop coefficient approach was used to estimate the crop water requirement
and then the water requirement
water deficiency and irrigation demand indexes of summer maize under the four hydrological year patterns were obtained.Finally
interpolation analysis of each water demand factor of summer maize was carried out based on ArcMap10.7
and spatial and temporal distribution characteristics of water demand
water deficiency and irrigation demand index of summer maize in Huang-Huai-hai Plain were visually described.The results showed that from 1951 to 2020
the distribution of the high value area of summer maize water requirement in Huang-Huai-hai Plain was not affected by the annual variation of hydrological pattern
and mainly distributed in the central region of the plain with a zonal distribution.The distribution characteristics of water deficiency index and irrigation demand index were similar.The range of high value area increased with the increase of drought degree (hydrological year pattern changes from wet to drought)
and mainly distributed in the north of central plain.The high-value area of effective rainfall was mainly concentrated in the southeast of the plain
and the overall distribution showed a decreasing trend from south to north.The water deficiency of summer maize in western Shandong
southern Hebei and northern Henan was high
so the aim of production should be to improve water use efficiency.Correspondingly
in southern Shandong
Northern Jiangsu and Anhui
the dependence of summer maize on irrigation was low
so the planting area of summer maize can be expanded appropriately and the yield should be taken as the target.
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Related Author
CHENG Dong-dong
ZHANG Min
YANG Yue-chao
LIU Ming
LIU Zhi-guang
WANG Bingyang1
CHEN Baozhang1
张景文
Related Institution
CHENG Dong-dong,ZHANG Min,YANG Yue-chao,LIU Ming,LIU Zhi-guang(National Engineering Research Center for Slow/Controlled Release Fertilizers,State Key Laboratory of Crop Biology,College of Environment and Resource,Shandong Agricultrual University,Taian,)
College of Soil and Water Conservation,Beijing Forestry University
Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences
Institute of Geographical Science and Resources, Chinese Academy of Sciences
Beijing Forestry University, College of Soil and Water Conservation