Changes and driving factors of crops planting structure in Hetao Irrigation Region in Inner Mongolia

doi:10.7522/j.issn.1000-694X.2020.00123

Journal of Desert Research ›› 2021, Vol. 41 ›› Issue (3): 110-117.DOI: 10.7522/j.issn.1000-694X.2020.00123

Changes and driving factors of crops planting structure in Hetao Irrigation Region in Inner Mongolia

Yongdao Gao¹^,²(), Rongrong Qiao², Shuxin Ji², Xuelian Bai², Lixiang Wang², Xueli Chang²()

^1.Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province，Guizhou Normal University，Guiyang 550001，China
^2.School of Resources and Environmental Engineering，Ludong University，Yantai 264025，Shandong，China

Received:2020-05-20 Revised:2020-11-23 Online:2021-05-26 Published:2021-05-26
Contact: Xueli Chang

Abstract

Abstract:

Agricultural planting structure is an important part of regional agricultural production and the core of regional water and soil resources allocation. In this paper， based on the MODIS NDVI multi-temporal remote sensing data from 2000 to 2018， combined with the field spectrometry of maize， wheat， sunflower and zucchini in different phenological phases and the GPS calibration of the planting area， a crop identification method based on threshold segmentation was constructed， and analyzed the changes of planting structure and driving factors of main crops in Hetao irrigation region. The results showed that： there were differences in the trends of acreage of maize and other crops， including maize acreage varied from 71.1×10³-199.3×10³ hm² with a fluctuating upward trend （P<0.001）； Wheat varied from 49.3×10³-249.2×10³ hm²， with a fluctuating downward trend （P<0.001）； sunflower acreage varied from 140.2×10³-337.4×10³ hm² with a fluctuating upward trend （P<0.001）； zucchini acreage varied from 6.4-68.3×10³ hm²， with a fluctuating upward trend （P<0.001）. During the study period， the area of sunflower conversion was the largest， and the area of sunflower planting land transferred to maize， wheat and zucchini was 107.9×10³ hm².The driving factors for the change in crop planting structure was the result of the combined effects of water diversion from the Yellow River， groundwater depth， temperature， population activity， social and economic development （GDP） and urban construction factors.

Key words: agricultural planting structure, normalized differential vegetation index, threshold, Hetao Irrigation region, driving factors

CLC Number:

S184

Yongdao Gao, Rongrong Qiao, Shuxin Ji, Xuelian Bai, Lixiang Wang, Xueli Chang. Changes and driving factors of crops planting structure in Hetao Irrigation Region in Inner Mongolia[J]. Journal of Desert Research, 2021, 41(3): 110-117.

Figures/Tables 8

References 35

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作物类型	平均面积 /10³ hm²	平均面积占比/%	变异系数	标准偏差 /10³ hm²
玉米	139.7	16.9	0.28	39.1
小麦	132.5	16.5	0.57	75.5
向日葵	250.5	30.4	0.23	58.3
番瓜	21.6	2.6	0.76	16.4

作物类型	平均面积 /10³ hm²	平均面积占比/%	变异系数	标准偏差 /10³ hm²
玉米	139.7	16.9	0.28	39.1
小麦	132.5	16.5	0.57	75.5
向日葵	250.5	30.4	0.23	58.3
番瓜	21.6	2.6	0.76	16.4

作物	玉米	小麦	向日葵	番瓜	其他	总计
玉米	20.4	63.1	29.4	2.2	34.5	149.6
小麦	4.0	24.3	3.5	0.6	9.9	42.2
向日葵	30.6	73.9	84.2	3.4	32.5	224.6
番瓜	6.6	23.5	9.3	1.3	12.2	52.9
其他	6.2	44.7	9.2	1.3	108.3	169.8
总计	67.8	229.6	135.5	8.8	197.4	639.0

作物	玉米	小麦	向日葵	番瓜	其他	总计
玉米	20.4	63.1	29.4	2.2	34.5	149.6
小麦	4.0	24.3	3.5	0.6	9.9	42.2
向日葵	30.6	73.9	84.2	3.4	32.5	224.6
番瓜	6.6	23.5	9.3	1.3	12.2	52.9
其他	6.2	44.7	9.2	1.3	108.3	169.8
总计	67.8	229.6	135.5	8.8	197.4	639.0

影响因素	玉米	小麦	向日葵	番瓜
年引黄水量/亿m³	-0.021	0.193	-0.149	0.007
地下水埋深/m	0.448	-0.490^*	0.524^*	0.616^**
年平均气温/℃	-0.345	0.529^*	-0.557^*	-0.285
总人口/万人	-0.767^**	0.788^**	-0.820^**	-0.479^*
GDP	0.936^**	-0.925^**	0.854^**	0.713^**
城市建成区面积/hm²	0.526^*	-0.590^**	0.455	0.749^**

Changes and driving factors of crops planting structure in Hetao Irrigation Region in Inner Mongolia

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预测指标		复相关系数	显著性
玉米(Y_m)	Y_m=-0.212X₁-35.553X₂+6.909X₃+1.948X₄+0.146X₅-0.311X₆-240.089	0.950	0.000
小麦(Y_w)	Y_w=1.046X₁+56.815X₂-0.603X₃+3.440X₄-0.129 X₅-2.555 X₆-444.092	0.974	0.000
向日葵(Y_s)	Y_s=0.727X₁+2.946X₂+4.237X₃-10.572X₄-0.007X₅+2.448X₆+1896.227	0.945	0.000
番瓜(Y_z)	Y_z=-0.532X₁+37.229X₂+0.376X₃+0.717X₄+0.037X₅-0.395X₆-159.197	0.794	0.070

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