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.

The Research on the K-Factor of Soil Erodibility in Northeast Black Soil Region

2012 ◽  
Vol 170-173 ◽  
pp. 1056-1059 ◽  
Author(s):  
Wei Qi Sun ◽  
Zhi Ming Liu ◽  
Teng Jiao Liu
Keyword(s):  
Sustainable Development ◽  
Black Soil ◽  
Scientific Basis ◽  
Soil Erodibility ◽  
Heilongjiang Province ◽  
Calculation Formula ◽  
Black Soil Region ◽  
K Factor ◽  
Soil Erodibility Factor ◽  
Soil And Water

This article takes soil erodibility factor as the research object, compared with the existing calculation formula. And it takes Yian (in Heilongjiang Province) as an example, quantitatively calculating the specific values of the black soil erodibility factor in northeast district, in order to provide basic data and scientific basis of the black soil for the purpose of conservation and sustainable development of soil and water in northeast district.

scholarly journals Effect of Land Use Change on Gully Erosion Density in the Black Soil Region of Northeast China From 1965 to 2015: A Case Study of the Kedong County

2021 ◽  
Vol 9 ◽  
Author(s):  
Maojuan Li ◽  
Tianqi Li ◽  
Lianqi Zhu ◽  
Michael E. Meadows ◽  
Wenbo Zhu ◽  
...  
Keyword(s):  
Land Use ◽  
Northeast China ◽  
Black Soil ◽  
Gully Erosion ◽  
Cultivated Land ◽  
Topographic Map ◽  
Degraded Land ◽  
Landsat Images ◽  
Black Soil Region ◽  
Gully Density

Kedong County is typical of the black soil region of northeast China in being highly susceptible to accelerated soil erosion by gullying. Using data sourced from Corona satellite imagery for 1965, SPOT5 for 2005 and GF-1 for 2015, the spatial distribution of gullies in the research area was mapped. Land use data for 1965, 2005, and 2015 were obtained from the topographic map of 1954, and from Landsat images for 2005 and 2015. Over the last 50 years, the extent of gully erosion in the study area has increased markedly, most notably on cultivated land, while gully density rose from 2,756.16 m2/km2 to 14,294.19 m2/km2. Cultivating land on slopes, especially on slopes greater than ∼4°, may rapidly aggravate gully erosion. The greatest increases in gully density occurred in situations when cultivated land and other/degraded land were transformed, which gully erosion density increased by 49,526.69 m2/km2. Other/degraded land is the most vulnerable land in the study area, with the highest gully erosion density. In these cases, gully density initially increases and, although the “Grain for Green” project has been implemented, gully erosion density has not always declined in the recent past.

scholarly journals Spatio-Temporal Characteristics and Obstacle Factors of Cultivated Land Resources Security

2021 ◽  
Vol 13 (15) ◽  
pp. 8498
Author(s):  
Liejia Huang ◽  
Yue Feng ◽  
Boqing Zhang ◽  
Weiyan Hu
Keyword(s):  
Spatial Pattern ◽  
Hubei Province ◽  
Economic Security ◽  
Ecological Security ◽  
Cultivated Land ◽  
Land Resources ◽  
Upward Trend ◽  
The West ◽  
Temporal Characteristics ◽  
Spatio Temporal

The security of cultivated land resources is closely related to a country’s food security, economic security and social security, and as such is always the top priority of those responsible for the governance and administration of state affairs. The study area is 13 prefecture-level cities in Hubei Province. An entropy weight method, comprehensive index method, spatial analysis and obstacle degree model are employed to explore the spatio-temporal characteristics and obstacle factors of cultivated land resources in quantity, quality and ecological security. The study shows that (1) the security level of cultivated land resources in Hubei Province showed an upward trend between 2010 and 2019. The land resources’ quality and ecological security showed an upward trend, while quantity security showed a downward trend. (2) The security of cultivated land resources presents obvious spatial differences, generally showing a decreasing trend from west to east. Among them, quantity security presents a spatial pattern of being high in the central, low in the east and lower in the west of Hubei Province. Quality security presents a spatial pattern of being high in the central region and low in the east and west. Ecological security presents a spatial pattern of being high in the west and low in the east. (3) The main obstacles to its security in quantity, in quality and in ecology are obviously different. Finally, some countermeasures are put forward to ensure the security of cultivated land resources from the perspectives of quantity, quality and ecological security, and to assist with the implementation of different protection policies in the western, central and eastern areas of Hubei. This study expands the content and perspective of cultivated land resources security and has a certain novelty in the selection of the index of water resources per unit of land area, and the application of the obstacle degree model expands the research on the influencing factors of cultivated land resource security.

scholarly journals Occupation of Cultivated Land for Urban–Rural Expansion in China: Evidence from National Land Survey 1996–2006

Land ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 1378
Author(s):  
Yangbing Miao ◽  
Jiajie Liu ◽  
Raymond Yu Wang
Keyword(s):  
Economic Development ◽  
Cultivated Land ◽  
Land Resources ◽  
Land Occupation ◽  
Construction Land ◽  
Intensive Use ◽  
Urban Rural ◽  
Land Survey ◽  
Spatio Temporal ◽  
Rural Construction

Construction land expansion often occurs on cultivated land in developing countries during rapid urbanization and industrialization. Understanding its characteristics and driving mechanisms is of great significance for land-use policy and sustainable development. This paper depicted the spatio-temporal patterns of China’s urban–rural expansion and its occupation of cultivated land based on national land survey data from 1996 to 2006. It further explored the influencing mechanism of cultivated land occupation for urban–rural construction land. The results showed that the establishment and expansion of various economic development zones contribute to more than half of the occupation of cultivated land while the expansion of cities and towns is relatively slower, and their sources of construction land are more diverse. The empirical results showed that (1) economic growth and investment play key roles in shaping the spatio-temporal patterns of the occupation of cultivated land for urban–rural construction land, and (2) the mechanisms of cultivated land occupation in different stages of regional development are different. In particular, the establishment of national economic development zones is conducive to the intensive use of construction land and the protection of cultivated land in inland regions, whereas provincial economic development zones have led to a waste of land resources in coastal regions. Based on the results, this study suggested that the policies to the intensive use of land resources and cultivated land protection required regional disparities.

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