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Dynamics of Saline-alkali Land and Its Ecological Regionalization in Western songnen plain, China

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Chinese Geographical Science 2010年第2期20卷 159-166页

作者： YANG Jiuchun ZHANG Shuwen LI Ying BU Kun ZHANG Yubo CHANG Liping ZHANG Yangzhen Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun 130012 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China Software College Jilin University Changchun 130012 China

As the important reserve land resources for food production,saline-alkali land should play a significant role to ensure the national food security in the context of global food crisis. The western songnen plain is one of main distribution regions of saline-alkali land in China,with great potential in agricultural development. In this study,the extent,transformation,spatial distribution and temporal change of saline-alkali land in the western songnen plain during 1954–2005 were investigated by using remote sensing and GIS spatial analysis methods. Saline-alkali land change was detected from a temporal series of topographic maps in 1954,satellite images of Landsat MSS in 1976,Landsat TM/ETM in 1988,2000 and 2005 through artificial visual interpretation. The results indicated a significant expansion in saline-alkali land area and aggravation in salinization. The area of saline-alkali land had increased from 401.48×103 ha in 1954 to 1 097.45×103 ha in 2005. While the ratio of light,moderate and serious salinized land areas changed from 6.72︰2.92︰1.00 to 1.25︰1.06︰1.00 in the study period. Grassland,cropland,swampland and water body were the major land use and land cover types from which saline-alkali land transformed. And the secondary salinization occured mainly in Da′an City,Tongyu County,Changling County,Daqing City,Dorbod Mongolian Autonomous County and Zhaoyuan County. Finally,seven large ecoregions and 14 corresponding sub-ecoregions were delineated out based on spatio-temopral dynamic characteristics of saline-alkali land and geo-relational environmental attributes. According to the results,measures of amelioration and ways of development of saline-alkali land in the western songnen plain were put forward.

关键词： saline-alkali land salinization ecological regionalization food security songnen plain

Effect of farmland expansion on drought over the past century in songnen plain,Northeast China

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Journal of Geographical Sciences 2020年第3期30卷 439-454页

作者： YU Wanhui ZHANG Lijuan ZHANG Hongwen JIANG Lanqi ZHANG Ankang Pan Tao Key Laboratory of Remote Sensing Monitoring of Geographic Environment College of Heilongjiang ProvinceHarbin Normal UniversityHarbin 150025China Key Laboratory of Land Surface Process and Climate Change in Northwest Institute of Eco-Environment and Resources CASLanzhou 730000China Heilongjiang Province Institute of Meteorological Sciences Innovation and Opening Laboratory of Regional Eco-Meteorology in NortheastChina Meteorological AdministrationHarbin 150030China

The effects of human activities on climate change are a significant area of research in the field of global environmental *** use and land cover change(LUCC)has a greater effect on climate than greenhouse gases,and the effect of farmland expansion on regional drought is particularly *** the 1910s to the 2010s,cultivated land in songnen plain increased by 2.67 times,the area of cultivated land increased from 4.92×10^4 km^2 to 13.14×10^4 km^2,and its percentage of all land increased from 25%to 70%.This provides an opportunity to study the effects of the conversion of natural grassland to farmland on *** this study,the drought indices in songnen plain were evaluated from the 1910s to the 2010s,and the effect of farmland expansion on drought was investigated using statistical methods and the Weather Research and Forecasting Model based on UK’s Climatic Research Unit *** resulting dryness index,Palmer drought severity index,and standardized precipitation index values indicated a significant drying trend in the study area from 1981 to *** trend can be attributed to increases in maximum temperature and diurnal temperature range,which increased the degree of *** on statistical analysis and simulation,the maximum temperature,diurnal temperature range,and sensible heat flux increased during the growing season in songnen plain over the past 100 years,while the minimum temperature and latent heat flux *** findings indicate that farmland expansion caused a drying trend in songnen plain during the study period.

关键词： drought effect farmland expansion centennial-scale changes songnen plain

SUSTAINABLE AGRICULTURE DEVELOPMENT IN SALINE-ALKALI SOIL AREA OF songnen plain,NORTHEAST CHINA

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Chinese Geographical Science 2003年第2期13卷 171-174页

作者： WANG Zhi-chun, LI Qu-sheng, LI Xiu-jun, SONG Chang-chun, ZHANG Guang-xin (Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, P. R. China) Northeast Institute of Geography and Agricultural Ecology Chinese Academy of Sciences Changchun P. R. China

There is great potential for agriculture in saline-alkali soil area in songnen plain, Northeast China. But the sustainable crop production in this area has been restricted by a few of main factors, such as less precipitation, h igher evaporation and frequent drought, high salinity and alkalinity, high excha ngeable sodium content and poor infiltration of the soil, and insufficiency and low availability in nutrition. It is also considered that there are a few of fav orable conditions for agricultural development in this region, such as sufficien t light and heat resources, rich ground water resources, plenty of manure produc ed by livestock, and so on. At the same time, scientific management and measurem ents have been employed; rational irrigation and drainage system has been establ ished; reclamation, amendment and fertilization of soil, and suitable strategies of cropping practices have been made for the sustainable development of agricul ture. Great progress has been made during 1996-2000.

关键词： sustainable agriculture development saline-alkali soil songnen plain

CATASTROPHIC ECO-ENVIRONMENTAL CHANGE IN THE songnen plain,NORTHEASTERN CHINA SINCE 1900S

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Chinese Geographical Science 2004年第2期14卷 179-185页

作者： WANGHai-xia WANZhong-juan YUShao-peng LUOXin-zheng SUNGuang-you NortheastlnstituteofGeographyandAgricuhuralEcology ChinesAcademyofSciencesChangchun130012P.R.China YantaiUniuersity Yantai300000P.R.China

Although the songnen plain in the northeastern China was developed relatively late in the temperate zone of the world, its eco-environment has changed greatly. This paper analyzes the changes of land cover and the rates and trends ofdesertification during the past 100 years in the songnen plain. According to the macroscopic analysis, we find that the eco-environment in the plain has reached to the threshold of catastrophic change since the 1950s. The Thom Needle Catastrophic Model was used to determine and validate this conclusion. Human activities, including large-scale construction projects, such as huge dams and dikes, and excessive grazing were the primary factors contributing to regional eco-environmental catastrophe. And irrational reclamation of the wilderness also affected the eco-environmental change. The results reveal the complex human-land interactions.

关键词： eco-environment catastrophe modeling songnen plain

Land Use/Cover Changes and Environmental Consequences in songnen plain,Northeast China

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Chinese Geographical Science 2009年第4期19卷 299-305页

作者： LIU Dianwei WANG Zongming SONG Kaishan ZHANG Bai HU Liangjun HUANG Ni ZHANG Sumei LUO Ling ZHANG Chunhua JIANG Guangjia Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun 130012 China KeyLaboratory for Vegetation Ecology of Ministry of Education Northeast Normal University Changchun 130024 China

The songnen plain in Northeast China,one of the key national bases of agricultural production,went through remarkable land use/cover changes in recent *** study aimed to explore the long-term land use/cover changes and the effects of these changes on the *** Landsat-based analysis showed that,during 1986-2000,cropland,built-up land and barren land had increased,among which cropland had the largest increase of 9,198km2 with an increase rate of 7.5%.Woodland,grassland,water body and swampland had decreased correspondingly,among which grassland had the most dramatic decrease of 6,127km2 with a decrease rate of 25.6%.The transition matrix results revealed that grassland,woodland and swampland were the three main land use types converted to *** warming created the potential environment for the conversion of grassland and swampland into *** resources policy made by central and provincial governments of China affected the pattern and intensity of land *** use/cover changes accompanied by climatic variation brought out a series of environmental consequences,such as sand desertification of land,land salinization and alkalinization,grassland degradation,and more frequent *** this circumstance,optimized land use structure and restoration measures are needed.

关键词： land use change remote sensing sustainable development songnen plain China

Effects of land use/cover change(LUCC) on the spatiotemporal variability of precipitation and temperature in the songnen plain,China

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Journal of Integrative Agriculture 2022年第1期21卷 235-248页

作者： CHU Xiao-lei LU Zhong WEI Dan LEI Guo-ping College of Resources and Environment Northeast Agricultural UniversityHarbin 150030P.R.China College of Surveying and Mapping Engineering Heilongjiang Institute of TechnologyHarbin 150050P.R.China Land Management Institute Northeastern UniversityShenyang 110169P.R.China Institute of Plant Nutrition and Resources Beijing Academy of Agricultural and Forestry SciencesBeijing 100097P.R.China

Understanding the effects of land use/cover change(LUCC) on regional climate is critical for achieving land use system sustainability and global climate change mitigation. However, the quantitative analysis of the contribution of LUCC to the changes of climatic factors, such as precipitation & temperature(P&T), is lacking. In this study, we combined statistical methods and the gravity center model simulation to quantify the effects of long-term LUCC on P&T in the songnen plain(SNP) of Northeast China from 1980–2018. The results showed the spatiotemporal variability of LUCC. For example, paddy field had the largest increase(15 166.43 km2) in the SNP, followed by dry land, while wetland had the largest decrease(19 977.13 km;) due to the excessive agricultural utilization and development. Annual average precipitation decreased at a rate of –9.89 mm per decade, and the warming trends were statistically significant with an increasing rate of 0.256°C per decade in this region since 1980. The model simulation revealed that paddy field, forestland, and wetland had positive effects on precipitation, which caused their gravity centers to migrate towards the same direction accompanied by the center of precipitation gravity, while different responses were seen for building land, dry land and unused land. These results indicated that forestland had the largest influence on the increase of precipitation compared with the other land use *** responses in promoting the temperature increase differed significantly, being the highest in building land, and the lowest in forestland. In general, the analysis of regional-scale LUCC showed a significant reduction of wetland, and the increases in building land and cropland contributed to a continuous drying and rapid warming in the SNP.

关键词： land use/cover change(LUCC) precipitation temperature songnen plain gravity center model satellite remote sensing

Effects of Biochar Application on Soil Organic Carbon in Degraded Saline-sodic Wetlands of songnen plain,Northeast China

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Chinese Geographical Science 2021年第5期31卷 877-887页

作者： CHE Qianjin LI Min ZHANG Zhongsheng 无 Yancheng Tearchers School Yancheng 224002China North Jiangsu Institute of Agricultural and Rural Modernization Yancheng 224002China Northeast Institute of Geography and Agroecology Chinese Academy of SciencesChangchun 130012China Xinfeng Middle School Yancheng 224100China

Biochar amendment is considered as an efficient practice for improving carbon storage in ***,to what extent that biochar application promotes organic carbon in saline-sodic soils remains poorly *** comparing soil organic carbon(SOC)contents change before and after biochar addition,we deciphered the driving factors or processes that control SOC change in response to biochar application.A limited increase in SOC was observed,about by 1.16%-12.80%,even when biochar was applied at the rate of 10%of bulk soil *** application enhanced soil dissolved organic carbon(DOC)significantly by up to 67%.It was estimated that about 50%SOC was allocated to small macroaggregates(250-2000μm,CPOC),and SOC in silt and clay-sized particles(<53μm)decreased obviously after biochar *** biomass increased with biochar amendment,of which actinomycetes(ACT),fungus(FUN),protozoon(PRO),and bacteria with straight-chain saturated fatty acids(OB)increased *** linear regression models implied that DOC was governed by ACT and soil N∶P ratio,while SOC mostly depended on *** principal component analysis and the partial least square path model(PLS-PM)indicated that biochar addition aggravated nitrogen limitation in saline-sodic soils,and effects of microorganisms on regulating SOC greatly depended on nitrogen *** application had vastly changed interactions between environmental factors and SOC in saline-sodic *** of nutrients on SOC shifted to great inhibition from strong stimulation after biochar addition,meanwhile,aggregation was the only factor presenting positive effects on *** to eliminate nutrient limitation and better soil aggregation process should be considered in priority when biochar was used to improve SOC in saline-sodic soils.

关键词： biochar saline-sodic soil soil organic carbon phospholipid fatty acid nutrient songnen plain China

Establishment of a diatom-total phosphorus transfer function for lakes on the songnen plain in northeast China

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Journal of Oceanology and Limnology 2020年第6期38卷 1771-1786页

作者： SUI Fengyang ZANG Shuying FAN Yawen LU Xinxin HUI Hongkuan Key Laboratory of Remote Sensing Monitoring of Geographic Environment College of Heilongjiang ProvinceHarbin Normal UniversityHarbin 150025China Key Laboratory of Biodiversity of Aquatic Organisms Harbin Normal UniversityHarbin 150025China Qilu Normal University Jinan 250200China

To understand the relationship between planktonic diatoms and environmental variables in the lakes on the songnen plain,northeast(NE)China,we investigated water quality and planktonic diatoms from 71 sampling points in 27 lakes,based on which Canonical Correspondence Analysis(CCA)was *** result show that planktonic diatoms displayed certain responses to environment gradients,and the total phosphorus(TP)explained the maximum variation of planktonic diatom species among the 15 environmental variables,suggesting that TP was the most important and significant environmental parameter affecting the distribution of diatom *** addition,we established a diatom-total phosphorus transfer(DTPT)function,of which component 5 of the weighted averaging partial least squares regression(WAPLS)was chosen to and compared with a series of weighted average regression(WA)models and WA-PLS *** to the jackknifing statistical test,the component 5 of WA-PLS models provided a lower root-mean-square error prediction(RMSEP=0.202)and a higher correlation coefficient between observation and prediction(R^2_Jack=0.759).After deletion of three outliers,the root-mean-square error prediction of the DTPT function was reduced(RMSEP=0.169)while the correlation coefficient between observation and prediction was increased(R^2_Jack=0.823).Therefore,this DTPT function performed better than other regional TP models in the ***,it remains demanding for expanding the background dataset to improve the prediction ability of the model.

关键词： songnen plain diatom total phosphorus transfer function

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Changes in groundwater resources and their influencing factors in songnen plain, China

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Journal of Groundwater Science and Engineering 2023年第3期11卷 207-220页

作者： Qiang Liu Xiao-dong Guo Chang-qi Wang Nan Lin Hui-rong Zhang Lin Chen Yan Zhang Shenyang Geological Survey Center China Geological SurveyShenyang 110034China Jilin University of Architecture Changchun 130119China Liaoning Institute of Geology and Mineral Research Co LtdShenyang 110032China

The songnen plain is a crucial agricultural area in China,and in the past 20 years,a large number of dry fields have been developed into paddy fields in order to improve land output *** a result,the effective irrigation area of agriculture has increased annually,and the conversion mode and quantity between surface water and groundwater have changed *** is essential to identify the changes in groundwater resources and their influencing factors for the sustainable development of economy and *** study evaluates groundwater resources in the songnen plain using the water balance method based on meteorological,hydrological and groundwater monitoring data from 2000 to *** results 3 show that the groundwater resources in the region amount to 15.945 billion m with precipitation infiltration being the most important component,accounting for 73.09%,which is followed surface water irrigation infiltration and river and ditch infiltration,constituting 14.55%and 10.32%,*** factors influence groundwater resources in different *** to 1985,the increase of surface water irrigation infiltration is the primary factor responsible for the increase of groundwater resources,while other recharge sources have decreased during the same *** to 2005,all groundwater resources have increased,with the increase of surface water irrigation infiltration and river channel infiltration being the primary factors.

关键词： songnen plain Groundwater resources Precipitation Irrigation Infiltration