Scale effects of trade-offs and synergies of multifunction of cultivated land: evidence from Wuhan Metropolitan Area

doi:10.3969/j.issn.1004-1524.2022.01.21

Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (1): 184-195.DOI: 10.3969/j.issn.1004-1524.2022.01.21

• Agricultural Economy and Development • Previous Articles Next Articles

Scale effects of trade-offs and synergies of multifunction of cultivated land: evidence from Wuhan Metropolitan Area

YANG Fengyanzi(), HU Weiyan^*(), LIU Tian, ZHANG Siyu

College of Public Administration, Huazhong Agricultural University, Wuhan 430070, China

Received:2020-12-25 Online:2022-01-25 Published:2022-02-05
Contact: HU Weiyan

Abstract

Abstract:

It is of significance to explore the scale effect of trade-offs and synergies of multifunction of cultivated land for the effective protection and sustainable utilization of cultivated land. Thus, Wuhan Metropolitan Area, China, was selected as the study area to explore the trade-offs and synergies of multifunction of cultivated land at multiple scales based on the establishment of evaluation system of multifunction of cultivated land and Spearman’s rank correlation. It was shown that the single function index and multi-function index of cultivated land had obvious spatial difference. The trade-offs and synergies within cultivated land functions had scale effect, which would change with the changing scale.These findings might provide basis for policy-makers to implement appropriate measures for the protectection of multifunction of cultivated land at the right spatial scale, and to promote higher-level synergies of multifunction of cultivated land to realize sustainable utilization.

Key words: sustainable use of cultivated land, multifunction of cultivated land, trade-offs, synergies, scale effects, Wuhan Metropolitan Area

CLC Number:

YANG Fengyanzi, HU Weiyan, LIU Tian, ZHANG Siyu. Scale effects of trade-offs and synergies of multifunction of cultivated land: evidence from Wuhan Metropolitan Area[J]. Acta Agriculturae Zhejiangensis, 2022, 34(1): 184-195.

Figures/Tables 6

Table 1 Multifunctional evaluation system of cultivated land in Wuhan Metropolitan Area

功能 Function	指标 Index	作用方向 Direction	计算方法 Calculation method	权重Weight
功能 Function	指标 Index	作用方向 Direction	计算方法 Calculation method	市 City	区县 County	乡镇 Township	场地 Site
生产功能 Production	地均粮食作物产量 Food production per unit area	+	粮食作物产量/土地面积 Total grain output/land area	0.100	0.083	0.056	0.107
function	地均经济作物产量 Cash crops production per unit area	+	经济作物产量/土地面积 Cash crops output/land area	0.095	0.154	0.100	0.168
	地均农业增加值 Agricultural added value per unit area	+	农业增加值/土地面积 Agricultural added value/land area	0.088	0.101	0.057	0.124
生态功能 Ecological function	地均化肥使用强度 Application intensity of chemical fertilizer per unit area	-	农用化肥施用量/土地面积 Chemical fertilizer application amount/land area	0.033	0.016	0.006	0.003
	地均固碳释氧量 Carbon fixation and oxygen release per unit area	+	(CO₂固定量+O₂释放量)/土地面积 (CO₂ absorption+O₂ release)/ land area	0.103	0.086	0.056	0.107
	农耕多样性 Diversity index of farmland ecosystem	+	$- \sum b_{i} \ln b_{i}$ b_i表示各种农作物播种面积与农作物总播种面积之比 b_i is the ratio of sown area of various crops to total sown area of crops	0.067	0.016	0.022	0.006
	水源涵养能力 Capacity of water resources protection	+	农作物冠层降雨截留量+土壤层蓄水 Crop canopy rainfall interception+ soil water storage	0.092	0.103	0.064	0.106
社会功能 Social	人均耕地面积 Per capita cultivated land area	+	耕地面积/常住人口 Cultivated land area / population	0.056	0.045	0.037	0.096
function	粮食自给率 Grain self-sufficiency rate	+	粮食产量/(常住人口×400) Total grain output/(population×400)	0.052	0.070	0.050	0.111
	农业产值比重 Proportion of agricultural output value	+	农业增加值/GDP Agricultural added value/GDP	0.105	0.090	0.061	0.138
景观功能 Landscape function	地均农业观光园个数 Number of agricultural sightseeing parks per unit area	+	农业观光园个数/土地面积 Number of agricultural sightseeing parks/land area	0.105	0.150	0.412	—
	景观集聚度指数 Landscape agglomeration index	+	用Fragstats4.2(CONTAG)测算 Calculated by Fragstats4.2(CONTAG)	0.038	0.045	0.065	—
	田块规整度 Squareness of cultivated land shape	+	用Fragstats4.2(PAFRAC)测算 Calculated by Fragstats4.2(PAFRAC)	0.066	0.051	0.014	—
	到最近农业观光园的距离 Distance to the nearest agricultural sightseeing park	+	运用ArcGIS 10.4平台的Buffer工具测算 Calculated by Buffer tool of ArcGIS 10.4 software	—	—	—	0.018
	到最近县乡级以上道路的距离 Shortest distance to the nearest road	+	运用ArcGIS 10.4平台的Buffer工具测算 Calculated by Buffer tool of ArcGIS 10.4 software	—	—	—	0.016

Table 1 Multifunctional evaluation system of cultivated land in Wuhan Metropolitan Area

功能 Function	指标 Index	作用方向 Direction	计算方法 Calculation method	权重Weight
功能 Function	指标 Index	作用方向 Direction	计算方法 Calculation method	市 City	区县 County	乡镇 Township	场地 Site
生产功能 Production	地均粮食作物产量 Food production per unit area	+	粮食作物产量/土地面积 Total grain output/land area	0.100	0.083	0.056	0.107
function	地均经济作物产量 Cash crops production per unit area	+	经济作物产量/土地面积 Cash crops output/land area	0.095	0.154	0.100	0.168
	地均农业增加值 Agricultural added value per unit area	+	农业增加值/土地面积 Agricultural added value/land area	0.088	0.101	0.057	0.124
生态功能 Ecological function	地均化肥使用强度 Application intensity of chemical fertilizer per unit area	-	农用化肥施用量/土地面积 Chemical fertilizer application amount/land area	0.033	0.016	0.006	0.003
	地均固碳释氧量 Carbon fixation and oxygen release per unit area	+	(CO₂固定量+O₂释放量)/土地面积 (CO₂ absorption+O₂ release)/ land area	0.103	0.086	0.056	0.107
	农耕多样性 Diversity index of farmland ecosystem	+	$- \sum b_{i} \ln b_{i}$ b_i表示各种农作物播种面积与农作物总播种面积之比 b_i is the ratio of sown area of various crops to total sown area of crops	0.067	0.016	0.022	0.006
	水源涵养能力 Capacity of water resources protection	+	农作物冠层降雨截留量+土壤层蓄水 Crop canopy rainfall interception+ soil water storage	0.092	0.103	0.064	0.106
社会功能 Social	人均耕地面积 Per capita cultivated land area	+	耕地面积/常住人口 Cultivated land area / population	0.056	0.045	0.037	0.096
function	粮食自给率 Grain self-sufficiency rate	+	粮食产量/(常住人口×400) Total grain output/(population×400)	0.052	0.070	0.050	0.111
	农业产值比重 Proportion of agricultural output value	+	农业增加值/GDP Agricultural added value/GDP	0.105	0.090	0.061	0.138
景观功能 Landscape function	地均农业观光园个数 Number of agricultural sightseeing parks per unit area	+	农业观光园个数/土地面积 Number of agricultural sightseeing parks/land area	0.105	0.150	0.412	—
	景观集聚度指数 Landscape agglomeration index	+	用Fragstats4.2(CONTAG)测算 Calculated by Fragstats4.2(CONTAG)	0.038	0.045	0.065	—
	田块规整度 Squareness of cultivated land shape	+	用Fragstats4.2(PAFRAC)测算 Calculated by Fragstats4.2(PAFRAC)	0.066	0.051	0.014	—
	到最近农业观光园的距离 Distance to the nearest agricultural sightseeing park	+	运用ArcGIS 10.4平台的Buffer工具测算 Calculated by Buffer tool of ArcGIS 10.4 software	—	—	—	0.018
	到最近县乡级以上道路的距离 Shortest distance to the nearest road	+	运用ArcGIS 10.4平台的Buffer工具测算 Calculated by Buffer tool of ArcGIS 10.4 software	—	—	—	0.016

Fig.1 Technical roadmap of trade-offs and synergies of multifunction of cultivated land

Fig.2 Multiscale spatial distribution pattern of single function of cultivated land in Wuhan Metropolitan Area Row 1 to row 4 showed the production function, ecological function, social function and landscape function of cultivated land, respectively; while column 1 to column 4 showed city scale, county scale, township scale and site scale, respectively.

Fig.3 Multiscale spatial distribution pattern of multifunction of cultivated land in Wuhan Metropolitan Area The upper and lower row showed the multifunctional degree of cultivated land measured by the weighted composite index method and the Simpson reciprocal index method, respectively. Columns 1 to 4 showed the results of the city scale, county scale, township scale and site scale, respectively.

Fig.4 Trade-offs and synergies of multifunction of cultivated land in Wuhan Metropolitan Area at different scales Columns 1 to 4 showed the results of the city scale, county scale, township scale and site scale, respectively. *, and ** indicated significant level at P<0.05 and P<0.01, respectively.

Fig.5 Scale effect of trade-offs and synergies of multifunction of cultivated land in Wuhan Metropolitan Area. Only significant (P<0.05) results were shown in the above figure.

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Scale effects of trade-offs and synergies of multifunction of cultivated land: evidence from Wuhan Metropolitan Area

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