Understanding the contradiction between rural poverty and rich cultivated land resources: A case study of Heilongjiang Province in Northeast China

2021 ◽  
Vol 108 ◽  
pp. 105673
Author(s):  
Dongmei Li ◽  
Yuanyuan Yang ◽  
Guoming Du ◽  
Shanlin Huang
Keyword(s):  
Northeast China ◽  
Rural Poverty ◽  
Heilongjiang Province ◽  
Cultivated Land ◽  
Land Resources

scholarly journals Reclamation of Cultivated Land Reserves in Northeast China: Indigenous Ecological Insecurity Underlying National Food Security

2020 ◽  
Vol 17 (4) ◽  
pp. 1211 ◽  
Author(s):  
Wenbo Li ◽  
Dongyan Wang ◽  
Shuhan Liu ◽  
Yuanli Zhu ◽  
Zhuoran Yan
Keyword(s):  
Food Security ◽  
Northeast China ◽  
Cultivated Land ◽  
Land Resources ◽  
Rapid Urbanization ◽  
Lower Productivity ◽  
Bare Land ◽  
Before And After ◽  
Induced Changes ◽  
Gains And Losses

The competition for land resources created by the need for food security and ecological security is intensifying globally. To resolve the issue of land scarcity in agriculture following rapid urbanization, China implemented its requisition–compensation balance policy of cultivated lands in 1997, the introduction of which consumed numerous areas of land, such as river shoal and bare land, through reclamation. Moreover, these reclaimed and newly cultivated lands were mainly distributed in the northern part of China. Most previous studies of this subject have only examined the overall balance of cultivated lands in well-developed regions, and there is a lack of knowledge about the indigenous gains and losses before and after reclamation in important areas such as northeast China. Therefore, this study selected two representative county-level units in northeast China as the study area to analyze the conversion of cultivated land reserves during 1996–2015, evaluate the performance of reclaimed cultivated lands in terms of quality and productivity and calculate reclamation-induced changes in ecosystem service value. The results indicated that by 2015 only 16.02% of the original cultivated land reserves remained unconverted; nearly 60% were reclaimed as cultivated lands and over 20% were converted to other land resources. River shoal and ruderal land were the primary resources for cultivated lands compensation, and marsh, bare land and saline-alkaline land were found to be converted the most thoroughly. The gain of 23018.55 ha reclaimed cultivated lands were of relatively inferior quality and lower productivity, contributing approximately 4.32% of total grain output. However, this modest gain was at the expense of a 768.03 million yuan ecosystem services loss, with regulating services and supporting services being undermined the most. We argue that even if northeast China continues to shoulder the responsibility of compensating for a majority of cultivated land losses, it still needs to carefully process reclamation and introduce practical measures to protect indigenous ecosystems, in order to better serve the local residents and ensure prolonged food security with sustainability.

scholarly journals Temporal and Spatial Characteristics of the Change of Cultivated Land Resources in the Black Soil Region of Heilongjiang Province (China)

2018 ◽  
Vol 11 (1) ◽  
pp. 38 ◽  
Author(s):  
Shan Xu
Keyword(s):  
Paddy Field ◽  
Black Soil ◽  
Heilongjiang Province ◽  
Cultivated Land ◽  
Land Resources ◽  
The West ◽  
Moderate Amount ◽  
Construction Land ◽  
Black Soil Region ◽  
Temporal And Spatial

It is of great significance for the improvement of grain production capacity and the protection of cultivated land in the Black Soil Region to reveal the temporal and spatial evolution trend of the change in cultivated land resources. In this paper, the temporal and spatial variation pattern of cultivated land resources in Heilongjiang Province was analyzed based on the remote sensing images made in 1995, 2005, and 2015 with the 3S Technology by using the land use dynamic degree, kernel density analysis, and transfer matrix methods. The results showed that, during the two decades from 1995 to 2015, the total quantity of cultivated land increased slightly. To be specific, in 1995–2005, the total quantity of cultivated land increased; in 2005–2015, the number decreased. Spatially, the conversion of cultivated land was mainly concentrated in the west of Heilongjiang Province. During the study period, the high-density cultivated land area was concentrated in the west of Heilongjiang Province, and the largest increase came in Heihe City and Qitaihe City. The conversion between each land type and cultivated land was observed. The internal conversion of cultivated land was between dryland and paddy field. The transfer-out of cultivated land was mainly the conversion of dryland into construction land and woodland, and the transfer-in was mainly the conversion of woodland, unused land, and construction land into dryland, while only a small quantity of conversion involving paddy field was found. Spatially, the conversion mainly took place in Harbin City, Heihe City, and Suihua City in the center and west of Heilongjiang Province, and also in a moderate amount in Qiqihar City in the east of Heilongjiang Province.

scholarly journals Study on the Contradiction between Population and Cultivated Land and the Priority Protection of Cultivated Land in the Policy of Poverty Alleviation: A Case Study of the Upper Reaches of Min River, Sichuan Province, China

2021 ◽  
Vol 13 (6) ◽  
pp. 3348
Author(s):  
Li Chen ◽  
Qing Wang
Keyword(s):  
Poverty Alleviation ◽  
Temporal Change ◽  
Temporal Evolution ◽  
Development Trend ◽  
Cultivated Land ◽  
Land Resources ◽  
The Sustainable Development ◽  
Min River ◽  
Protection Area

The contradiction between population and cultivated land has always been an urgent global problem, and one that is particularly prominent in China. Based on the spatial–temporal evolution of cultivated land, this paper discusses the human–land contradiction and its development trend. Then, according to the threshold of human–land contradiction and different protection objectives, the priority protection area of cultivated land was simulated. The results showed that: (1) the cellular automata (CA)–Markov model is suitable for the study area. The cultivated land in the study area increased at a rate of 4.40 sq km per year; (2) the spatial and temporal change in the cultivated land in Songpan was the largest. The center of gravity of cultivated land is moving to the northeast, and the moving rate is increasing year on year; (3) 90% of the study area was in the human–land coordination and the change in the ratio of accumulation and cultivation in some areas (such as Songpan) is increasing, making the human–land contradiction worse; (4) under a protection target of 25–100%, the priority protection area of cultivated land increased from 2.05 × 103 km2 to 3.46 × 103 km2, and the patch aggregation degree was strengthened. This study was of great significance for optimizing the distribution of cultivated land and promoting the sustainable development of land resources.

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