临夏地区农用地等级综合评价方法

doi:10.11720/wtyht.2020.1469

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Abstract

The method proposed in this paper is based on the use of land quality geochemical survey data and the collected comprehensive information on agricultural land environment to accurately classify the land grades in Linxia, Gansu. Taking the agricultural landform and yield per mu as macro-level indicators, the authors used the soil traits, soil nutrients, land cleanliness and life-health elements as micro-indicators to decompose, quantify and assign various indicators. The authors objectively and comprehensively used the new viewpoints of macro-index grading and micro-level grading, established cadastral archives of agricultural land quality survey, and provided an important basisfor land management decision-making.

Key words： agricultural land comprehensive evaluation grading Linxia area

Received: 30 September 2019 Published: 29 December 2020

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Corresponding Authors: WU Yong-Qiang E-mail: 461689577@qq.com

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	Articles by authors
	Bei-Zhan FENG
	Yong-Qiang WU
	Wen-Hui LIU
	Xiang WANG
	Chun-Liang LI

Cite this article:

Bei-Zhan FENG,Yong-Qiang WU,Wen-Hui LIU, et al. A discussion on the comprehensive evaluation method of agricultural land grade in Linxia region[J]. Geophysical and Geochemical Exploration, 2020, 44(6): 1455-1463.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2020.1469 OR https://www.wutanyuhuatan.com/EN/Y2020/V44/I6/1455

指标分类	环境要素	指标类型	指标权重	指标状态	指标等级	指标含义	指标变量
宏观指标 (权重50)	农田地貌(权重20)	坡度	4	<5°	Ⅰ级	好	X1
				5°~15°	II级	中等	X2
				>15°	Ⅲ级	差	X3
		含水率	6	>15%	Ⅰ级	好	X4
				8%~15%	II级	中等	X5
				<8%	Ⅲ级	差	X6
		耕作条件	10	大型机耕	Ⅰ级	好	X7
				小型机耕	II级	中等	X8
				(人)牛耕	Ⅲ级	差	X9
	亩产量 (权重30)	产量	30	>750 kg	Ⅰ级	好	X10
				500~750 kg	II级	中等	X11
				<500 kg	Ⅲ级	差	X12
微观指标 (权重50)	土壤性状(权重6)	土壤质地	4	壤土	Ⅰ级	好	X13
				壤黏土	II级	中等	X14
				重(硬)黏土	Ⅲ级	差	X15
		耕层厚度	2	>120 mm	Ⅰ级	好	X16
				80~120 mm	II级	中等	X17
				<80 mm	Ⅲ级	差	X18
指标分类	环境要素	指标类型	指标权重	指标状态	指标等级	指标含义	指标变量
	土壤养分 (权重10)	全氮	2	>2×10^-3	Ⅰ级	好	X19
				(1~2)×10^-3	II级	中等	X20
				<1×10^-3	Ⅲ级	差	X21
		全磷	2	>1×10^-3	Ⅰ级	好	X22
				(0.6~1)×10^-3	II级	中等	X23
				<0.6×10^-3	Ⅲ级	差	X24
		全钾	2	>25×10^-3	Ⅰ级	好	X25
				(15~25)×10^-3	II级	中等	X26
				<15×10^-3	Ⅲ级	差	X27
		有机质	4	>40×10^-3	Ⅰ级	好	X28
				(20~40)×10^-3	II级	中等	X29
				<20×10^-3	Ⅲ级	差	X30
	土壤微量元素 (权重5)	全锗	1	>1.5×10^-6	Ⅰ级	好	X31
				(1.3~1.5)×10^-6	II级	中等	X32
				<1.3×10^-6	Ⅲ级	差	X33
		全钼	1	>0.85×10^-6	Ⅰ级	好	X34
				(0.55~0.85)×10^-6	II级	中等	X35
				<0.55×10^-6	Ⅲ级	差	X36
		全硼	3	>65×10^-6	Ⅰ级	好	X37
				(45~65)×10^-6	II级	中等	X38
				<45×10^-6	Ⅲ级	差	X39
微观指标 (权重50)	土壤环境 (权重19)	镉	5	<0.3×10^-6	Ⅰ级	好	X40
				(0.3~0.6)×10^-6	II级	中等	X41
				>1.5×10^-6	Ⅲ级	差	X42
		汞	4	<1.3×10^-6	Ⅰ级	好	X43
				(1.3~3.4)×10^-6	II级	中等	X44
				>2.0×10^-6	Ⅲ级	差	X45
		砷	3	<25×10^-6	Ⅰ级	好	X46
				(25~40)×10^-6	II级	中等	X47
				>40×10^-6	Ⅲ级	差	X48
		铅	3	<70×10^-6	Ⅰ级	好	X49
				(70~170)×10^-6	II级	中等	X50
				>400×10^-6	Ⅲ级	差	X51
		铬	1	<150×10^-6	Ⅰ级	好	X52
				(150~250)×10^-6	II级	中等	X53
				>800×10^-6	Ⅲ级	差	X54
		铜	1	<50×10^-6	Ⅰ级	好	X55
				(50~100)×10^-6	II级	中等	X56
				>100×10^-6	Ⅲ级	差	X57
		镍	1	<60×10^-6	Ⅰ级	好	X58
				(60~190)×10^-6	II级	中等	X59
				>190×10^-6	Ⅲ级	差	X60
		锌	1	<200×10^-6	Ⅰ级	好	X61
				(200~300)×10^-6	II级	中等	X62
				>300×10^-6	Ⅲ级	差	X63
	生命健康元素 (权重10)	硒	4	>0.4×10^-6	Ⅰ级	好	X64
				(0.125~0.4)×10^-6	II级	中等	X65
				<0.125×10^-6	Ⅲ级	差	X66
		碘	3	>5×10^-6	Ⅰ级	好	X67
				(1~5)×10^-6	II级	中等	X68
				<1×10^-6	Ⅲ级	差	X69
		氟	3	>550×10^-6	Ⅰ级	好	X70
				(400~550)×10^-6	II级	中等	X71
				<400×10^-6	Ⅲ级	差	X72

Integrated evaluation index system of agricultural land environmental quality in study area

Agricultural land classification and grading standards in the Linxia region

Macro index grading

Micro index grading

Summary of results of agricultural land classification and grading in Linxia

Classification of environmental quality grades of agricultural land in Linxia region

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