PDF(917 KB)
The effect of cultivated land renting-in on sustainable intensification of cultivated land use: Analysis of the mediating effect of management scale and fragmentation level
LYU Xiao, SUN Xiao-wen, PENG Wen-long
JOURNAL OF NATURAL RESOURCES ›› 2024, Vol. 39 ›› Issue (3) : 620-639.
PDF(917 KB)
PDF(917 KB)
The effect of cultivated land renting-in on sustainable intensification of cultivated land use: Analysis of the mediating effect of management scale and fragmentation level
({{custom_author.role_en}}), {{javascript:window.custom_author_en_index++;}}Based on 526 survey data of farming households in Qufu and Juxian county, this paper comprehensively evaluates the sustainable intensification level of farming households' cultivated land use by carbon footprint and emergy analysis methods. Based on the analysis of the transmission mechanism of cultivated land renting-in affecting SICLU, we use the mediated effect model to test the mediated role of management scale and fragmentation of cultivated land. The results show that: (1) The SICLU level of cultivated land transferred to farming households is higher, producing better economic and social benefits, but its ecological efficiency needs to be improved. The economic benefit, ecological benefit, social benefit and the level of SICLU are 0.115, 0.067 and 0.081; 0.623, 0.630 and 0.628; 0.045, 0.043 and 0.044; 0.261, 0.247 and 0.251 for renting-in farming households, non-renting-in farming households and the whole sample, respectively. (2) Baseline regression shows that cultivated land renting-in has a significant positive effect on SICLU, which is still valid after a series of robustness tests. The average years of education and the ratio of family dependency are important factors affecting SICLU. (3) The mediated effect model shows that cultivated land renting-in has a significant positive effect on the management scale and the average land size. The cultivated land management scale whose mediating effect is 0.019 shows a significant positive and complete mediating effect, and the average land size shows a significant positive and partial mediating effect, whose mediating effect accounts for 43.021% of the total effect. All the mediating effects above pass the robustness test. (4) The results of farming households heterogeneity test show that cultivated land renting-in has a significant positive effect on the SICLU of farming households in the "high family dependency ratio" and "participating in agricultural insurance" group, but has no significant effect on the SICLU of farming households in the "low family dependency ratio" group and "not participating in agricultural insurance" group. The conclusion of this study is helpful to understand the impact of cultivated land renting-in on the SICLU and its mechanism, and has guiding significance for promoting the transformation of cultivated land use.
cultivated land use / sustainable intensification / cultivated land renting-in / carbon footprint / emergy analysis / mediated effect model {{custom_keyword}} /
Table 1 Evaluation index system for tourism ecological carrying capacity of coastal counties in Jiangsu province表1 江苏省沿海县域旅游生态承载力评价指标体系[28] |
| 目标层 | 准则层 | 指标层 | 指标含义 | 权重 |
|---|---|---|---|---|
| 旅游生态承载力 | 旅游生态载体 | 海岸类型（C1） | 研究区海岸类型（基岩、砂砾质、淤泥质） | 0.520 |
| 水域景观密度（C2） | 水域旅游资源丰富程度 | 0.211 | ||
| 水源养护指数（C3） | 水资源对植被、土壤等景观的养护能力 | 0.199 | ||
| 水土保持指数（C4） | 水土方面旅游环境的质量状况 | 0.004 | ||
| 植被覆盖指数（C5） | 植被资源覆盖程度 | 0.016 | ||
| 栖息地质量指数（C6） | 水鸟、麋鹿等动物栖息地资源质量状况 | 0.017 | ||
| 年降水量（C7） | 湿润程度 | 0.034 | ||
| 旅游载荷 | 海产品供给指数（L1） | 鱼、虾等海产品的供给质量和能力 | 0.517 | |
| 宾馆酒店密度（L2） | 住宿接待服务强度 | 0.077 | ||
| 公路密度（L3） | 交通服务强度 | 0.315 | ||
| A级景区禀赋（L4） | A级景区等级和数量/个 | 0.042 | ||
| 旅游收入（L5） | 旅游经济压力 | 0.024 | ||
| 游客人次（L6） | 游客压力 | 0.026 |
| [1] |
FAO, IFAD, UNICEF, et al. Repurposing food and agricultural policies to make healthy diets more affordable. In: The State of Food Security and Nutrition in the World 2022. Rome: FAO, 2022: 1-231.
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [2] |
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [3] |
彭文龙, 吕晓, 牛善栋. 论耕地利用可持续集约化与农户生计转型. 农业工程学报, 2022, 38(4): 270-277.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [4] |
吕晓, 彭文龙, 牛善栋. 耕地利用的可持续集约化:理论探索与多尺度实证. 北京: 科学出版社, 2022.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [5] |
彭文龙, 吕晓, 辛宗斐, 等. 国际可持续集约化发展经验及其对中国耕地保护的启示. 中国土地科学, 2020, 34(4): 18-25.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [6] |
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [7] |
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [8] |
吕晓, 牛善栋, 谷国政, 等. “新三农”视域下中国耕地利用的可持续集约化: 概念认知与研究框架. 自然资源学报, 2020, 35(9): 2029-2043.
耕地利用的可持续集约化为保障粮食安全、农业绿色发展和资源永续利用提供了新思路,对于深化农民主体地位、夯实农业发展的现代化导向、破解“新三农”复杂的问题集合具有重要的现实意义。系统梳理国外可持续集约化的思想缘起,辨析可持续集约化的内涵差异,厘清“新三农”视域下中国耕地利用可持续集约化的逻辑本源;基于要素融合—结构重整—功能优化的运行轨迹,遵循耕地利用系统过程—格局—机制—效应的逻辑进路,尝试从学理辨析、水平测度、演化机理和优化调控等方面厘清耕地利用系统基本问题域并阐释其研究主题,构建耕地利用可持续集约化的研究框架。探索性提出未来研究需重点关注的农业生态空间—人地关系—耕地利用可持续集约化等科学问题,探讨因素+机理、功能+系统、过程+格局、尺度+界面的关键路径。
[
Promoting sustainable intensification of cultivated land use (SICL) has provided a new idea for ensuring food security and green development of agriculture and sustainable use of resources. It is of important practical significance to deepen the dominant position of farmers, strengthen the modernization orientation of agricultural development, and solve the problem "New Agriculture, Countryside and Peasants", which is a complex collection of problems. This paper reviews the research on the ideologial origin of sustainable intensification abroad, identifies the connotation differences of SICL, and clarifies the logic origin of SICL of China under the background of "New agriculture, Countryside and Peasants". Based on the trajectory of "factor fusion-structural reorganization-functional excellence", following the logical approach of "process-pattern-mechanism-effect" in the system of cultivated land use, this paper clarifies the problem domain of cultivated land use system from the aspects of theoretical analysis, level measurement, evolution mechanism and optimal regulation, so as to construct a research framework of SICL. Finally, it proposes the scientific issues of "agricultural ecological space-human-land relationship-SICL", and discusses the significance and key issues of "factor & mechanism, function & system, process & pattern, scale & interface".
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [9] |
刘源, 吕晓, 彭文龙. 辽宁省耕地利用可持续集约化水平及其影响因素. 土壤通报, 2022, 53(5): 1009-1018.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [10] |
吕晓, 孙晓雯, 彭文龙, 等. 基于能值分析的沈阳市耕地利用可持续集约化时空分异特征研究. 中国土地科学, 2022, 36(9): 79-89.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [11] |
李丽, 吕晓, 张安录, 等. 农户耕地利用的可持续集约化: 理论框架、水平测度及其确权响应. 资源科学, 2022, 44(6): 1168-1180.
可持续集约利用是实现耕地“三位一体”保护的有效方式,其水平高低与农户要素配置有关,而地权强度是影响农户配置行为的重要变量,农地确权的按期完成也为检验其制度绩效提供了一个良好的外生自然实验。本文基于2017年山东省三县（区）农户实地调查,构建“耕地利用的可持续集约化（SICL）概念内涵—SICL水平测算—SICL确权响应及其响应机理”的分析框架,探讨SICL的概念内涵,测算农户层面的SICL水平,理论剖析并实证检验了农地确权是否以及如何影响了耕地的可持续集约利用水平。研究发现：①SICL包括经营集约化、产出高效化、资源节约化、生态环境不退化4个维度,可从“投入-产出”范畴衡量。②样本农户SICL水平集中于“低度可持续集约利用”区间,五莲组农户SICL水平相对不可持续,而东平组和垦利组状况相对较好。③耕地利用对农地确权的响应表现为可持续集约化的效率改善或耗散,这与农户是否具备与农地确权后相适配的生产要素重配置能力有关。并且,农户家庭距县城越远,确权后耕地利用的非可持续集约化效果越强。随着农户粮食种植专业化程度的提升,农地确权后抑制农户SICL的政策效果会得到缓解。基于此,可从设计SICL评估框架、提高确权后农户的要素配置能力、实施地区差别化政策等入手缓解农地确权对SICL的制度抑制,促进耕地利用的可持续集约化转型。
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [12] |
刘晶, 金晓斌, 徐伟义, 等. 耕地细碎化对可持续集约利用的影响机理与治理框架. 地理学报, 2022, 77(11): 2703-2720.
科学调适耕地细碎现象使其益于耕地可持续集约利用且与环境背景相适应是细碎化治理研究及实践长期努力的目标。从耕地细碎化与耕地可持续集约利用的理论内涵出发，剖析细碎化影响耕地可持续集约利用的理论机理，构建面向可持续集约利用的耕地细碎化“特征—影响—环境”综合治理分析框架，探讨细碎化治理中的关键问题、情景决策机理及空间尺度效应，希冀为优化细碎化治理提供理论借鉴。结果表明：① 耕地细碎化是涵盖资源、空间、利用及权属等多维属性特征的复合体系，对资源利用、农业生产、景观生态等影响广泛且复杂，并通过多尺度全方位、差异性和不确定性、交互式级联传导等作用路径成为影响耕地可持续集约利用的核心和关键。② 耕地细碎化本身并不具备明显的问题/价值倾向，其成为问题或有益的情形和程度取决于其影响及当地自然地理、农业生态、社会经济等环境背景及农业发展定位。③ 以细碎化特征表现为基础，以其对耕地可持续集约利用多维影响为依据，以其与地方环境背景相适应为准则的耕地细碎化“特征—影响—环境”综合治理框架通过解构复杂细碎化情景治理决策中的5个关键问题、两个关系、两个倾向及3级空间尺度互联互通机理，为从多维度、复合视角科学诊断细碎化治理导向、优化治理模式提供新思路，有益于完善细碎化治理体系、促进耕地可持续集约利用。
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [13] |
叶曼飞, 单玉红. 农地利用可持续集约化水平评估及其影响因素研究. 农业资源与环境学报, 2022, 39(6): 1185-1195.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [14] |
Cultivated land utilization around the world is accompanied by the cultivated land fragmentation, which is a significant agricultural feature of countries with economies in transition. Thereby, governments of the PRC have successively promulgated a series of relevant policies to promote the cultivated land transfer (CLT) and stimulate the transformation of cultivated land utilization to be both green and efficient. In the context of large-scale CLT and the implementation of a rural revitalization strategy for China, it is of great significance to explore the effect of CLT on cultivated land green utilization efficiency (CLGUE). In this work, 30 provinces of China were selected as the objects of investigation; the super-efficiency SBM model was used to evaluate CLGUE; the mediation effect model and threshold regression model were used to gain a more comprehensive understanding of the CLT’s influence on CLGUE. According to the results of this study, the following conclusions were drawn. First of all, the CLGUE in China as a whole showed an upward trend improvement from 2005 to 2019. Due to the different natural and economic conditions, the CLGUE trends showed significant spatial disparities at both the grain functional areas level and provincial level. Secondly, the CLT could promote CLGUE directly, and the mediation regression results demonstrated that CLT was able to enhance CLGUE indirectly through the mediator of cultivated land management scale. Thirdly, the threshold effect test confirmed the existence of a single threshold, indicating that when the level of CLT gradually crossed the threshold, the promotion effects of CLT on CLGUE would slow down. Lastly, the heterogeneity analysis indicated that the promotion effects of CLT on CLGUE in different geographical location areas and grain functional areas were positive, and that there were significant differences in regression coefficients.
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [15] |
马贤磊, 车序超, 李娜, 等. 耕地流转与规模经营改善了农业环境吗? 基于耕地利用行为对农业环境效率的影响检验. 中国土地科学, 2019, 33(6): 62-70.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [16] |
杜鑫, 王昌海. 土地流转对农户粮食产出和家庭收入的影响研究. 价格理论与实践, 2021, (11): 21-26.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [17] |
黄祖辉, 王建英, 陈志钢. 非农就业、土地流转与土地细碎化对稻农技术效率的影响. 中国农村经济, 2014, (11): 4-16.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [18] |
陈振, 郭杰, 欧名豪, 等. 资本下乡过程中农地流转风险识别、形成机理与管控策略. 长江流域资源与环境, 2018, 27(5): 988-995.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [19] |
陈振, 欧名豪, 郭杰, 等. 农地资本化流转风险的形成与评价研究. 干旱区资源与环境, 2018, 32(9): 13-18.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [20] |
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [21] |
吉雪强, 刘慧敏, 张跃松. 中国农地流转对农业碳排放强度的影响及作用机制研究. 中国土地科学, 2023, 37(2): 51-61.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [22] |
冒佩华, 徐骥. 农地制度、土地经营权流转与农民收入增长. 管理世界, 2015, 31(5): 63-74, 88.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [23] |
李星光, 霍学喜, 刘军弟, 等. 苹果产区农地流转和契约稳定性对土地质量改善行为的影响. 农业工程学报, 2019, 35(15): 275-283.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [24] |
陈训波, 武康平, 贺炎林. 农地流转对农户生产率的影响: 基于DEA方法的实证分析. 农业技术经济, 2011, (8): 65-71.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [25] |
仇童伟, 罗必良, 何勤英. 农地流转市场转型: 理论与证据: 基于对农地流转对象与农地租金关系的分析. 中国农村观察, 2019, (4): 128-144.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [26] |
Sustainable agricultural economic growth emphasizes the improvement of agricultural technical efficiency. This paper examines the impact of the rural land transfer market on agricultural technical efficiency by constructing a theoretical framework of the impact mechanism of the rural land transfer market on agricultural technical efficiency. The data of rural land transfer market in 30 provinces from 2005 to 2020 in China were used in this paper, and the stochastic frontier analysis (SFA) and Tobit model equation linkage was applied. The results showed: (1) In terms of time differences, the rural land transfer market had a significant stimulating and involution effect on agricultural technical efficiency. In 2006–2015, the rural land transfer market had a significant stimulating effect on agricultural technical efficiency, and, in 2016–2020, the rural land transfer market entered the stage of involution, and the rural land transfer market had a involution effect on agricultural technical efficiency. (2) In terms of regional differences, the stimulating effect of the rural land transfer market on agricultural technical efficiency was mainly concentrated in the main grain producing areas, and the involution effect was mainly concentrated in the non-main grain producing areas. (3) The involution effect of the rural land transfer market exceeded the stimulating effect, which made the rural land transfer market have a inhibition effect on agricultural technical efficiency from a comprehensive view of the overall trend.
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [27] |
吕晓, 辛宗斐, 彭文龙, 等. 农业可持续集约化评价的研究进展与展望. 应用生态学报, 2022, 33(12): 3205-3212.
农业可持续集约化是保障全球粮食安全,应对饥荒、贫困和气候变化的现实路径。本文采用文献资料法、归纳演绎法等,探索性构建了农业可持续集约化的研究框架,并从概念源起、指标体系、研究尺度和评价方法4个方面系统回顾研究进展,进而探讨未来发展路径,以期为深化多学科交叉视角下的农业可持续集约化评价及其相关研究提供参考。国际上农业可持续集约化研究成果多样,基于生产力、经济、环境、社会等多个维度赋予了其丰富内涵。农业可持续集约化评价涉及生产力、经济、环境、人类和社会等多个方面,形成了包括物质投入、资源生产率、环境经济效率等多元指标的综合评价体系。评价方法主要包括要素综合评价法和指数模型评价法两类。国内相关研究相对较少,有待进一步丰富,未来应突破传统理论方法框架的约束,瞄准国际发展所带来的变革性科学议题,探索多学科交叉融合下的农业可持续集约化研究范式。
[
Sustainable intensification in agriculture (SI) is a realistic pathway to ensure global food security and deal with famine, poverty, and climate change. We constructed a SI research framework using methods such as literature, induction, and deduction. We reviewed the progress of SI research from four aspects, including the conceptual origin, index system, research scale, and evaluation methods. We discussed the future development path to provide reference for deepening related research of SI and its relation from the multi-disciplinary angle. There are many kinds of research on SI across the world, which give rich connotations to SI based on multiple dimensions of productivity, economy, environment, and society. The evaluation of SI involves productivity, economy, environment, human and society. It has formed a comprehensive evaluation system such as material input, resource productivity, environmental and economic efficiency, and other multiple indicators. Moreover, the evaluation methods of SI mainly include the factor comprehensive evaluation method and index model evaluation method. Studies on SI are not abundant in China, which needs to be enriched. We should break through the constraints of traditional theoretical and methodological frameworks, focus on the transformative scientific issues brought by international development, and explore the research paradigm of SI from the cross-disciplinary perspective.
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [28] |
郭阳, 钟甫宁, 纪月清. 规模经济与规模户耕地流转偏好: 基于地块层面的分析. 中国农村经济, 2019, (4): 7-21.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [29] |
韩菡, 钟甫宁. 劳动力流出后“剩余土地”流向对于当地农民收入分配的影响. 中国农村经济, 2011, (4): 18-25.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [30] |
俞海, 黄季焜,
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [31] |
刘巽浩, 徐文修, 李增嘉, 等. 农田生态系统碳足迹法: 误区、改进与应用: 兼析中国集约农作碳效率. 中国农业资源与区划, 2013, 34(6): 1-11.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [32] |
李建政, 王迎春, 王立刚, 等. 农田生态系统温室气体减排技术评价指标. 应用生态学报, 2015, 26(1): 297-303.
目前,国内外学者很少从评价的角度去研究农田温室气体减排技术,缺乏完整性和统一性的评价指标,不利于对农田管理技术进行科学的判断.本研究汇总了当前可作为农田减排技术评价的指标,遵循代表性、客观性、完整性、主导性和可操作性原则,对各项指标的合理性进行了分析,依据我国农业生产实际情况,确定了农田生态系统温室气体减排技术的评价指标.以单位面积粮食产量作为约束性指标,温室气体排放强度(单位产量下的温室气体排放总量)作为综合指标,并将粮食产量、土壤有机碳变化、N<sub>2</sub>O直接排放、水田CH<sub>4</sub>排放与农田投入直接和间接排放作为后者的分项指标;依据温室气体排放强度计算公式,能够科学、系统地评价农田减排技术的温室效应,可为我国农田减排技术的提出和推广提供科学依据.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [33] |
田云, 张俊飚. 中国农业生产净碳效应分异研究. 自然资源学报, 2013, 28(8): 1298-1309.
农业具有碳排与碳汇的双重效应。分析和把握不同省区的农业净碳水平,是深入研究农业生产碳排放问题的重要前提。鉴于此,研究基于农用物资投入、稻田、土壤、牲畜养殖等四方面23类主要碳源和以水稻、小麦为代表的15类主要农作物碳汇品种,测算了我国1995—2010年及31个省(市、区)2010年的农业生产碳排量、碳汇量,并在此基础上计算了各自净碳汇量。结果表明:①我国农业生产净碳汇量总体保持上升态势,由1995年的26 736.13×10<sup>4</sup> t增至2010年的37 697.19×10<sup>4</sup> t,年均递增2.32%。其中,碳排放量由1995年的24 952.39×10<sup>4</sup> t增至2010年的29 116.91×10<sup>4</sup> t,年均递增1.03%;碳汇量由1995年的51 688.51×10<sup>4</sup> t增至2010年的66 814.10×10<sup>4</sup> t,年均递增1.73%,碳汇增速明显快于碳排增速,可见我国在农业节能减排方面取得了一定成效。分阶段来看,呈现较为明显的"上升—下降—上升"的三阶段变化特征。②横向来看,区域净碳效应差异明显:农业生产净碳汇绝对量,排在前10位的地区占全国农业生产净碳汇总量的73.02%,而排在后10位的地区仅占全国的1.59%。农业生产碳汇水平,黑龙江、吉林、广西排在前三位,分别高达410.81%、400.94%和356.79%;西藏、青海、福建排在后三位,仅为25.57%、41.55%和103.80%。其中,黑龙江等12个地区农业碳汇水平高于全国同期平均水平(229.47%)。
[
Agriculture has double effects of carbon emission and carbon sink. The analysis of net carbon effect of every province is important prerequisites for in-depth studying of agricultural production carbon emission. With such a view, this study calculates the amount of carbon emissions and carbon sink from 1995 to 2010 and that of 31 provinces in 2010, based on the agricultural resources inputs, paddy fields, soil and breeding livestock of 23 categories on the major carbon sources with rice and wheat as the representative of the 15 categories of major crops carbon sink species. On the basis of the above the net carbon sink is concluded. The results showed that: 1)The overall net carbon sink of agricultural production maintains an upward trend from 267.3613 million ton in 1995 to 376.9719 million ton in 2010 with an average annual increasing rate of 2.32%. Carbon emissions increased from 249.5239 million ton in 1995 to 291.1691 million ton in 2010 with an average annual increasing rate of 1.05%; and carbon sink rises from 516.8851 million ton in 1995 to 668.1410 million ton in 2010 with an average annual increasing rate of 1.73%. From the above fact the growth rate of carbon sink is significantly faster than that of carbon emission. This indicates that China has gained certain achievement in agricultural energy reduction. Additionally, it shows "up-down-up" phase-change characteristics. 2) Compared horizonally, the regional difference of net carbon effect is obvious: in the absolute amount of net carbon sink of agricultural production, the top 10 regions accounted for 73.02% of the national overall net carbon sink of agricultural production while that of the last 10 regions was only 1.59%. The level of carbon sinks on agricultural production in Heilongjiang, Jilin and Guangxi come to the top three of 410.81%, 400.94% and 356.79% respectively; Tibet, Qinghai and Fujian are the last three with only 25.57%, 41.55% and 103.80%; among which 12 regions including Jilin are higher than the national average level during the same period (229.47%).
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [34] |
邹晓霞, 张晓军, 王月福, 等. 山东省小麦—夏直播花生种植体系碳足迹. 应用生态学报, 2018, 29(3): 850-856.
明确小麦-夏直播花生(W-P)种植体系的主要碳排放环节,可为采取有效措施实现该体系高产与低碳排放的协同效益提供参考.本文依据全生命周期方法,构建碳足迹模型,并核算了山东省W-P种植体系生命周期碳排放.结果表明: 山东省W-P种植体系的净收益较小麦-玉米(W-M)种植体系高71.2%～88.3%;W-P种植体系的单位面积碳排放达6977.9～8018.5 kg·hm<sup>-2</sup>,较W-M种植体系高6.2%,但单位净产值的碳排放为每元0.23～0.28 kg CO<sub>2</sub>-eq,较W-M种植体系低37.4%～44.1%.综合2种种植体系的净收益和单位净产值碳排放发现,W-P种植体系可以实现高产出与低碳排放的协同效益,符合优化供给、提质增效、农民增收的农业供给侧结构性改革目标.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [35] |
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [36] |
IPCC. 2006 IPCC guidance for national greenhouse gas inventories. KANAQAWA: IGES, 2006.
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [37] |
国家发展和改革委员会. 省级温室气体清单编制指南(试行). 北京: 2011.
[ NDRC. Provincial greenhouse gas inventory compilation guidelines (trial). Beijing: 2011.]
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [38] |
朱永昶. 土地规模化经营对农业减缓和适应气候变化的影响研究. 北京: 中国农业科学院, 2017.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [39] |
王梁, 赵杰, 陈守越. 山东省农田生态系统碳源、碳汇及其碳足迹变化分析. 中国农业大学学报, 2016, 21(7): 133-141.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [40] |
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [41] |
周淑梅, 武菁, 王国贞. 华北平原农田生态系统服务评价及灌溉效益分析. 中国生态农业学报, 2017, 25(9): 1360-1370.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [42] |
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [43] |
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [44] |
In this article, we attempt to distinguish between the properties of moderator and mediator variables at a number of levels. First, we seek to make theorists and researchers aware of the importance of not using the terms moderator and mediator interchangeably by carefully elaborating, both conceptually and strategically, the many ways in which moderators and mediators differ. We then go beyond this largely pedagogical function and delineate the conceptual and strategic implications of making use of such distinctions with regard to a wide range of phenomena, including control and stress, attitudes, and personality traits. We also provide a specific compendium of analytic procedures appropriate for making the most effective use of the moderator and mediator distinction, both separately and in terms of a broader causal system that includes both moderators and mediators.
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [45] |
牛善栋. 农户尺度耕地可持续集约利用机理研究: 以山东省典型农户调查为例. 日照: 曲阜师范大学, 2018.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [46] |
郑沃林, 罗必良, 钟文晶. 农户气候风险认知、政策工具干预与农业保险市场扭曲. 广东财经大学学报, 2020, 35(5): 101-111.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [47] |
赵立娟, 牛庭. 耕地转入、农业保险与农户收入的实证分析. 河南农业大学学报, 2022, 56(6): 1052-1060.
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| [48] |
牛文浩, 申淑虹, 罗岚, 等. 地形差异视角下耕地流转对农户收入差距的影响及其分解: 以黄河流域中上游1879份农户数据为例. 自然资源学报, 2023, 38(5): 1262-1282.
基于黄河流域中上游1879份农户调研数据，从地形差异的视角，借助无条件分位数回归模型和RIF回归分解法揭示了耕地流转对农户收入差距的影响及其作用机制。结果表明：（1）耕地流转对高收入农户群体增收效应大于低收入农户群体，从而导致农户收入差距扩大，其中系数效应是造成该差距扩大的主因，在耕地转入中贡献度达90%以上，在耕地转出中贡献度达60%以上。（2）耕地转入在平原和山区对高收入农户群体增收效应均大于低收入农户群体，从而导致平原和山区农户收入差距扩大，且该现象在山区更加显著，其中系数效应也是造成该差距扩大的主因，在平原的贡献度达90%以上，在山区的贡献度达80%以上。（3）耕地转出仅对平原中等收入农户群体具有显著增收效应，从而导致平原中低收入农户群体间的收入差距扩大，其中系数效应同样也是造成该差距扩大的主因，贡献度达70%以上。因此，应针对不同收入水平农户和地形特征实施差异化的耕地流转支持政策，以促进耕地流转对农户的增收均衡，缩小农村贫富差距。
[
{{custom_citation.content}}
{{custom_citation.annotation}}
|
| {{custom_ref.label}} |
{{custom_citation.content}}
{{custom_citation.annotation}}
|
PDF(917 KB)
Fig. 1 Location of the research areaFig. 2 Multi-scale fusion evaluation unit division modelFig. 3 Interactive relationship between tourism ecological carrier and tourism load
Table 1 Evaluation index system for tourism ecological carrying capacity of coastal counties in Jiangsu provinceFig. 4 Division results of multi-scale fusion evaluation units of coastal counties in Jiangsu provinceFig. 5 Multi-scale fusion spatial evaluation unit of coastal counties in Jiangsu provinceFig. 6 Standardized evaluation indicators for tourism ecological carries of coastal counties in Jiangsu province at different scalesFig. 7 Standardized evaluation indicators for tourism load of coastal counties in Jiangsu province at different scalesFig. 8 Percentage of the relative area of each grade of tourism ecological carrying capacity of coastal counties in Jiangsu provinceat different scalesFig. 9 Spatial differentiation of tourism ecological carrying capacity of coastal counties in Jiangsu province at different scalesFig. 10 Spatial differentiation of tourism ecological carrying capacity of coastal counties in Jiangsu province/
| 〈 |
|
〉 |
