Evaluation of Climatic Suitability and Regionalization Research on Tobacco Cultivation in Yuxi

doi:10.11924/j.issn.1000-6850.casb2025-0350

Abstract

Abstract:

Flue-cured tobacco planting is highly sensitive to climatic conditions. In order to make rational use of climatic resources and explore the influence of climatic factors on the growth and development of flue-cured tobacco, this study carried out the climatic suitability regionalization of flue-cured tobacco in Yuxi area, aiming to provide scientific support for the optimization of flue-cured tobacco planting layout. Based on conventional meteorological observation data and geographic information data from towns across Yuxi, and its unique climatic conditions and the actual production situation of its tobacco-growing areas, the evaluation indicators for climatic suitability were screened and their weights were determined using the Delphi method and an objective weighting method. Membership function models for different climate indicators were established using fuzzy mathematics statistics. On the GIS platform, meteorological elements were spatialized, and a fine-grid calculation model was comprehensively applied to quantitatively estimate the values of the climatic suitability evaluation indicators, thereby achieving refined climatic zoning that reflects the suitability of flue-cured tobacco cultivation in Yuxi. The results indicated that the most suitable areas for tobacco cultivation were mainly distributed in the central-west and northeast parts of Yuxi, centered on the urban district; suitable planting areas were primarily located in the central, northern, and southwestern border regions; less suitable areas were scattered across all counties and districts of Yuxi; unsuitable areas were relatively concentrated, mainly in low-altitude areas of the Yuanjiang to Xinping river valley and the western border region of Xinping County, the east part of Yimen County, the central part of Huaning County, and the high-altitude north part of Yuxi’s urban district. The fine-grid calculation model for each zoning indicator demonstrated high accuracy, with a spatial resolution of 30 m × 30 m. The zoning results showed strong agreement with the current distribution of flue-cured tobacco planting in Yuxi, providing a scientific basis for the region to respond to future climate change and optimize the layout of tobacco cultivation zones.

Key words: flue-cured tobacco, Yuxi, GIS, climatic suitability, evaluation, zoning indicator, membership function

ZHONG Yanhua, CAI Xuzhang, LIN Zhiye, JING Yuanshu, CHEN Jizhen, ZHANG Tao. Evaluation of Climatic Suitability and Regionalization Research on Tobacco Cultivation in Yuxi[J]. Chinese Agricultural Science Bulletin, 2025, 41(29): 91-98.

Figures/Tables 5

References 29

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评价指标	隶属函数类型	x₁	x₂	x₃	x₄
海拔/m	抛物线型	1000.0	1400.0	1800.0	2200.0
7月均温/℃	抛物线型	17.0	20.0	22.5	26.0
7—8月日照时数/h	升梯型	180.0	280.0	—	—
4—9月降水量/mm	抛物线型	400.0	500.0	1000.0	1400.0

评价指标	隶属函数类型	x₁	x₂	x₃	x₄
海拔/m	抛物线型	1000.0	1400.0	1800.0	2200.0
7月均温/℃	抛物线型	17.0	20.0	22.5	26.0
7—8月日照时数/h	升梯型	180.0	280.0	—	—
4—9月降水量/mm	抛物线型	400.0	500.0	1000.0	1400.0

指标	推算模型	R	F
7月均温(T₇)/℃	T₇=-0.000195ϕ h+0.075064c+25.803246	0.889	22.716**
7—8月日照时数(R_4-9)/h	R_4-9=19.247λ+21.359ϕ+6.147c+0.542407a-0.10077b-0.00505λh+0.000147h²-2053.63	0.985	33.009**
4—9月降水量(H_4-9)/mm	H_4-9=82.567λ-2168.585ϕ+0.014h+1.085ϕ³+2.433×10^-8h³-5.958a+0.005b+29273.629	0.383	3.867**

指标	推算模型	R	F
7月均温(T₇)/℃	T₇=-0.000195ϕ h+0.075064c+25.803246	0.889	22.716**
7—8月日照时数(R_4-9)/h	R_4-9=19.247λ+21.359ϕ+6.147c+0.542407a-0.10077b-0.00505λh+0.000147h²-2053.63	0.985	33.009**
4—9月降水量(H_4-9)/mm	H_4-9=82.567λ-2168.585ϕ+0.014h+1.085ϕ³+2.433×10^-8h³-5.958a+0.005b+29273.629	0.383	3.867**