Fine Regionalization of Climatic Suitability for Sorghum Planting in Shanxi Province Based on GIS

doi:10.11924/j.issn.1000-6850.casb2022-0281

Abstract

Abstract:

Climatic conditions and growth cycle are crucial for sorghum planting. To optimize the layout of sorghum planting in Shanxi Province, it is important to fully and rationally use the climatic resources. In this work, we analyzed and modeled the daily meteorological data to establish the sorghum climate regionalization based on the climatic suitability grade, in which the data were collected from 109 meteorological monitoring stations in Shanxi Province ranging from 1979 to 2020. Specifically, we adopted the related climatic indices as the experimental indices for the sorghum climate regionalization, which included the average temperature, precipitation, sunshine hours, effective accumulated temperature ≥10℃, and the annual frost-free period data during the sorghum growth period. GIS method was utilized to calculate the climatic elements of the sorghum planting and correct the climatic indices of regionalization based on the geographical relationships.

The experimental results indicated that the most suitable areas for sorghum planting in Shanxi Province located in most counties (districts) on the west side of Lvliang Mountain and most other basins in Shanxi Province, which accounted for 41% of the total area. The sub-suitable areas were mainly distributed in low plains or low mountain areas of Shanxi Province, which accounted for 42% of the total area. Unsuitable areas were mainly distributed in high-altitude and cold areas in Shanxi Province, which accounted for 17% of the total area. This work demonstrated the significance of climatic conditions and the growth cycle for sorghum planting in Shanxi Province. It could provide a scientific basis for sorghum planting and production in all counties (districts) in Shanxi Province.

Key words: Shanxi Province, climatic regionalization, suitability, sorghum, GIS

HAN Xiaoying, ZHANG Lei, YANG Sanwei, LU Yanzhen, LI Wenting. Fine Regionalization of Climatic Suitability for Sorghum Planting in Shanxi Province Based on GIS[J]. Chinese Agricultural Science Bulletin, 2023, 39(9): 92-99.

Figures/Tables 14

区域类型	T_ave/℃	ΣT_≥10℃/℃	S/h	R/mm	FFP/d
最适宜区	>20	>2800	>1200	>420	>160
次适宜区	14~20	2400~2800	1000~1200	350~420	120~160
不适宜区	<14	<2400	<1000	<350	<120

区划指标	模型	相关系数R	F值
T_ave	62.812-0.315λ-0.044φ-0.006 h-0.001θ	0.976	418.584^**
ΣT_≥10℃	9480.584-45.700λ-9.642φ-0.996 h+0.030θ-0.032β	0.975	396.177^**
S	203.255-7.372λ+44.977φ+0.052 h+0.386θ+0.053β	0.840	48.789^**
R	-2.073+12.590λ-30.328φ+0.112 h+0.443θ+0.011β	0.813	39.788^**
FFP	644.712-1.651λ-6.528φ-0.053 h+0.127θ-0.004β	0.970	321.975^**

区划因子	隶属函数
T_ave/℃	$μ x 1 1 x ≥ 20 x - 14 6 14 < x < 20 0 x ≤ 14$
ΣT_≥10℃/℃	$μ x 2 1 x ≥ 2800 x - 2400 400 2400 < x < 2800 0 x ≤ 2400$
S/h	$μ x 3 1 x ≥ 1200 x - 1000 200 1000 < x < 1200 0 x ≤ 1000$
R/mm	$μ x 4 1 x ≥ 420 x - 350 70 350 < x < 420 0 x ≤ 350$
FFP/d	$μ x 5 1 x ≥ 160 x - 120 40 120 < x < 160 0 x ≤ 120$

区划因子	隶属函数
T_ave/℃	$μ x 1 1 x ≥ 20 x - 14 6 14 < x < 20 0 x ≤ 14$
ΣT_≥10℃/℃	$μ x 2 1 x ≥ 2800 x - 2400 400 2400 < x < 2800 0 x ≤ 2400$
S/h	$μ x 3 1 x ≥ 1200 x - 1000 200 1000 < x < 1200 0 x ≤ 1000$
R/mm	$μ x 4 1 x ≥ 420 x - 350 70 350 < x < 420 0 x ≤ 350$
FFP/d	$μ x 5 1 x ≥ 160 x - 120 40 120 < x < 160 0 x ≤ 120$

区划指标	ΣT_≥10℃	T_ave	S	R	FFP
ΣT_≥10℃	1	3	5	5	7
T_ave	1/3	1	3	5	7
S	1/5	1/3	1	3	7
R	1/5	1/5	1/3	1	3
FFP	1/7	1/7	1/7	1/3	1
权重值	0.47	0.27	0.14	0.07	0.03

分级	最适宜	次适宜	不适宜
U	>0.84	0.36~0.84	<0.36

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