陕西渭北旱塬区县域耕地时空变化及其对粮食生产影响

doi:10.12118/j.issn.1000–6060.2021.246

Abstract

Abstract:

This paper investigates the temporal and spatial change of cultivated land quantity, evaluation of the cultivated land quality and its temporal and spatial changes, and impact of cultivated land change on food production in Hancheng City, Shaanxi Province, China. The scope of the cultivated land is extracted using the spatial analysis method, and the change in the cultivated land quantity in Hancheng City during the study period is analyzed. The comprehensive index of the cultivated land quality is calculated using the analytic hierarchy process and Delphi method. Then, the cultivated land quality grade is conducted to obtain the evaluation results of the cultivated land quality in Hancheng City. Based on the ArcGIS software and location index model of cultivated land quality grade, the temporal and spatial changes in cultivated land quality in Hancheng City in the past decade were obtained. Finally, through the transfer model of the distribution center of gravity, the distribution center of cultivated land quality and the distribution center of grain production location in Hancheng City are calculated, and the relationship between them is analyzed. The results are as follows. (1) In the past decade, the spatial distribution of cultivated land resources in the study area has been unchanged, concentrated in the eastern plains and along the Yellow River. The amount of cultivated land gradually decreases and disperses from east to northwest, and the reduced cultivated land is distributed in the main construction areas of the central urban area. (2) The cultivated land quality in the study area changed significantly, the area of each grade varied greatly, and the area of grade 2 cultivated land accounted for the largest proportion. In space, the cultivated land quality gradually decreases from the east along the Yellow River to the northwest, and a cultivated land quality belt of low land, high land, and medium land is formed from top to bottom. (3) Farming methods, non-grain, and cultivated land quality are the main factors influencing grain yield and production location in the study area. The center of the gravity distribution area of medium and high-quality cultivated land in the study area has a high degree of congruence with the core area of wheat and corn production, and the migration direction is the same. Exploring and analyzing the temporal and spatial variation characteristics of cultivated land quality and its impact on grain production is essential to solving the problems of regional cultivated land protection and non-grain. This paper selects a typical county research area to investigate the relationship between cultivated land quality and food production from the spatial aspect, which is expressed through the spatial layout and migration direction, to reflect the cultivated land and food security in ecologically fragile areas of non-food producing areas. It is essential to deeply understand the utilization characteristics of regional cultivated land resources, make rational use and efficient management of cultivated land resources, and ensure regional food security.

Key words: cultivated land quality evaluation, temporal and spatial change of cultivated land, food security, Weibei dryland district

LONG Xiaocui,LIU Jing,XU Zhongwei,WEI Fang. Temporal and spatial changes of cultivated land and its impact on grain production in Weibei dryland district of Shaanxi Province[J].Arid Land Geography, 2022, 45(2): 423-434.

Figures/Tables 10

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目标层（A）	准则层（B）	指标层（C）
耕地质量	立地条件	农田林网化程度、海拔、地形部位
	土壤剖面性状	耕层质地、土壤容重、pH
	耕层理化性状	有效土层厚度、障碍因素、质地构型
	土壤养分状况	有机质、有效磷、速效钾
	土壤健康状况	生物多样性、清洁程度
	农田基础设施	灌溉能力、排水能力

年份	一级指标平均得分						评价得分	质量等级
年份	立地条件	土壤剖面性状	耕层理化性状	土壤养分状况	土壤健康状况	农田基础设施	评价得分	质量等级
2009	0.843	0.826	0.892	0.771	0.917	0.626	0.795	4.266
2018	0.853	0.825	0.898	0.790	0.917	0.637	0.800	4.140

耕地质量等级		2018年
耕地质量等级		1	2	3	4	5	6	7	8	9	总计
2009年	1	3.00	2.92	0.20							6.12
	2	2.74	32.20	11.61	0.28						46.82
	3	2.43	5.47	13.00	1.34	0.16					22.40
	4	0.14	2.06	8.79	3.94	1.16	0.27	0.03			16.39
	5		0.02	0.27	1.57	2.02	1.20	0.29			5.37
	6			0.01	1.08	1.43	6.87	0.41	0.05	0.02	9.87
	7				0.01	0.60	2.42	7.19	1.22	0.05	11.49
	8						0.19	5.29	2.85	0.04	8.38
	9						0.00	0.07	1.51	0.35	1.94
	总计	8.31	42.66	33.86	8.22	5.37	10.95	13.29	5.64	0.46	128.77

耕地质量等级	年份	镇域
耕地质量等级	年份	黄河沿岸	板桥镇	金城街道	龙门镇	桑树坪镇	西庄镇	新城街道	芝川镇	芝阳镇
1	2009	0.00	0.24	0.99	0.00	0.00	0.09	1.23	0.15	0.97
1	2018	0.00	0.10	4.61	0.00	0.00	0.04	1.51	0.28	0.49
2	2009	0.26	1.86	8.05	0.01	0.00	4.45	2.61	1.79	1.00
2	2018	0.27	1.39	6.93	0.01	0.00	4.57	1.66	1.65	4.89
3	2009	1.09	0.39	3.12	0.00	0.00	0.81	4.96	0.96	4.38
3	2018	1.25	1.69	1.26	0.00	0.00	0.72	6.13	1.20	1.60
4	2009	2.34	0.83	0.36	0.01	1.80	0.06	0.81	1.12	0.93
4	2018	0.99	0.19	0.26	1.05	3.25	0.03	0.20	0.85	0.11
5	2009	3.84	0.03	0.25	2.31	4.97	0.04	0.01	0.19	0.45
5	2018	5.48	0.10	0.00	1.58	2.23	0.01	0.00	0.18	0.40
6	2009	5.30	0.16	0.00	0.27	3.98	0.05	0.00	0.52	5.33
6	2018	7.21	0.01	0.00	0.00	8.68	0.04	0.00	0.54	6.91
7	2009	5.02	0.12	0.00	4.06	8.97	1.11	0.00	0.17	2.37
7	2018	2.66	0.38	0.00	8.58	1.39	1.13	0.00	0.17	0.95
8	2009	0.55	0.27	0.00	8.62	2.33	0.18	0.00	0.05	0.11
8	2018	0.40	0.01	0.00	4.35	9.67	0.51	0.00	0.04	0.00
9	2009	0.07	0.00	0.00	0.02	5.12	0.40	0.00	0.00	0.00
9	2018	0.00	0.00	0.00	0.00	1.63	0.07	0.00	0.00	0.00

年份	耕地质量		粮食生产
年份	X/m	Y/m	X/m	Y/m
2009	718290.88	3929566.74	722691.40	3926598.69
2018	718342.42	3929554.52	722707.61	3926571.50
迁移	51.53	-12.22	16.21	-27.19

Temporal and spatial changes of cultivated land and its impact on grain production in Weibei dryland district of Shaanxi Province

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