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Author(s):  
Qinyi Huang ◽  
Yu Zhang

Ensuring food security and curbing agricultural carbon emissions are both global policy goals. The evaluation of the relationship between grain production and agricultural carbon emissions is important for carbon emission reduction policymaking. This paper took Heilongjiang province, the largest grain-producing province in China, as a case study, estimated its grain production-induced carbon emissions, and examined the nexus between grain production and agricultural carbon emissions from 2000 to 2018, using decoupling and decomposition analyses. The results of decoupling analysis showed that weak decoupling occurred for half of the study period; however, the decoupling state and coupling state occurred alternately, and there was no definite evolving path from coupling to decoupling. Using the log mean Divisia index (LMDI) method, we decomposed the changes in agricultural carbon emissions into four factors: agricultural economy, agricultural carbon emission intensity, agricultural structure, and agricultural labor force effects. The results showed that the agricultural economic effect was the most significant driving factor for increasing agricultural carbon emissions, while the agricultural carbon emission intensity effect played a key inhibiting role. Further integrating decoupling analysis with decomposition analysis, we found that a low-carbon grain production mode began to take shape in Heilongjiang province after 2008, and the existing environmental policies had strong timeliness and weak persistence, probably due to the lack of long-term incentives for farmers. Finally, we suggested that formulating environmental policy should encourage farmers to adopt environmentally friendly production modes and technologies through taxation, subsidies, and other economic means to achieve low-carbon agricultural goals in China.


2021 ◽  
Vol 14 (1) ◽  
pp. 38
Author(s):  
Zheng Cai ◽  
Shengsheng Li ◽  
Guoming Du ◽  
Ruhao Xue

Food security and environmental protection—led by sustainable agricultural development—are key development goals of Heilongjiang Province. One of the main challenges facing the Heilongjiang Province is improving soil and livelihood by integrating smallholder farmers into the pilot crop rotation project. This paper investigates a comprehensive project—the new crop rotation pilot project in Heilongjiang (NCRPPH)—which aims to improve the livelihood of the pilot participants by involving smallholder farmers in the pilot crop rotation program and connecting them with the food industry through farmers’ cooperatives. This paper analyzes the impact of the NCRPPH on farmers’ crop rotation, grain yield, multi-agent cooperation, food security, and education based on data collected in 2019 and other retrospective information. The instrumental variable method and three different estimation strategies are used to solve the endogenous problem. The results show that the project has a vast and positive impact on the gross and net value of grain production per hectare and the share of products sold to food manufacturers through cooperatives. Regardless of the farm size, farmers have equal opportunities from which they can benefit. In addition, our analysis shows that the NCRPPH improves the educational situation and food security without affecting crop rotation practices. Finally, our research proves the effectiveness of this project.


2021 ◽  
Vol 13 (24) ◽  
pp. 14010
Author(s):  
Hao Li ◽  
Wenshuang Xi ◽  
Lijuan Zhang ◽  
Shuying Zang

Heilongjiang Province is located in the northeast region of China, with the country’s highest latitude. It has long and cold winters, and a temperate monsoon climate. Its unique geographic location and climatic conditions make it the second largest stable snow-covered region in China. The winter snow period starts in October and ends in April of the following year. Therefore, the long-term accumulation of snow causes road obstructions and low-temperature frost damage, which seriously affects local economic development and human safety. This study adopts snow parameters (e.g., snow depth and snow-cover period), natural environmental factors (e.g., elevation and slope), and socioeconomic factors (e.g., gross domestic product and light index). On the basis of the disaster risk assessment theory, we constructed a disaster risk index from four aspects (i.e., disaster risk, susceptibility, vulnerability, and disaster prevention and mitigation). Then, we performed snow-disaster risk zoning and an assessment in Heilongjiang Province. The main findings are as follows: the snow-disaster risk in the northern and eastern regions of Heilongjiang Province was high; the central and northern regions were highly sensitive to disasters; the main urban areas were highly vulnerable; and the economically developed regions had strong disaster prevention and mitigation capabilities. Overall, the spatial distribution of the snow-disaster risk followed a decreasing trend from east to west. High-risk areas were distributed in the east and northwest (covering 34.3% of the entire Heilongjiang Province area); medium-risk areas were distributed in the north and center (accounting for 45.2% of the entire Heilongjiang Province area); and low-risk areas were concentrated in the west (constituting 20.5% of the entire Heilongjiang Province area).


Minerals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1380
Author(s):  
Yu Gao ◽  
Yujie Hao ◽  
Siyu Lu

The Weizigou Au deposit in Heilongjiang Province, NE China, located in the southern Jiamusi Massif, shows similarities to IOCG deposits. To determine the mineralization age, sources of ore-forming materials and genetic type, pyrite Re-Os dating, S-Pb isotopic analysis, in situ sulfur analysis and LA-ICP-MS analysis of trace elements in magnetite, pyrite and pyrrhotite were conducted. Four pyrite samples yielded a Re-Os isochron age of 197 ± 11 Ma, implying the occurrence a metallogenic event in the Early Jurassic. The δ34S values of sulfides display a relatively narrow range from 4.70‰ to 12.83‰ (mainly 9.90‰ to 12.83‰), which may be accounted for the extensively exposed granitic gneiss and meta-gabbro, with δ34S values of 7.44‰ to 8.44‰ and 4.37‰ to 10.54‰, respectively. Sulfide lead isotopic compositions have 206Pb/204Pb = 18.605–20.136, 207Pb/204Pb = 15.637–15.710 and 208Pb/204Pb = 38.534–39.129, indicating that the lead was derived from a mixed source. Magnetite has the characteristics of a lower Ti content and higher Zn content, indicating that it should be of hydrothermal origin, which may be related to IOCG-type mineralization. Pyrite and pyrrhotite have a Co/Ni ratio greater than 1 and a lower As content, indicating that they are of magmatic hydrothermal origin. Integrating the above analysis results, we inferred that the Weizigou Au deposit experienced the IOCG-type mineralization in the Middle-Late Permian, associated with magmatic-hydrothermal mineralization in the Early Jurassic.


2021 ◽  
Author(s):  
Lei Yang ◽  
Fenglian Liu

At present, there are still some problems in rural land circulation in Heilongjiang Province. Among them, the high price of land circulation is a prominent problem at present, and the price of land circulation is the most important factor affecting land circulation. In this paper, literature analysis, field investigation and interview are used to study the current situation and influencing factors of agricultural land transfer price in Heilongjiang Province, and further analyze the impact of agricultural land transfer price on land transfer. The results show that: (1) In recent years, the transfer price of agricultural land in Heilongjiang Province has been on the rise; (2) The price of farmland transfer will be affected by the factors of grain price, grain producer subsidy, land quality and transfer period; (3) The age of the head of household, the willingness of the head of household to cultivate, the area of agricultural land transfer, the proportion of non-agricultural income, and the types of food planted have no significant effect on the transfer price of farmland.


2021 ◽  
Vol 48 ◽  
pp. 49-61
Author(s):  
Zhishan Cao ◽  
Ding Yang ◽  
Weihai Li

The genus Capniella Klapálek, 1920 is recorded from China for the first time: C. gibba Hwang, Li & Murányi, 2021 was collected from Liaoning Province, and C. nodosa Klapálek, 1920 from Heilongjiang Province. Both species are redescribed from both sexes, including the unknown female of the recently described C. gibba.


Life ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1303
Author(s):  
Fengjuan Pan ◽  
Feng Li ◽  
Yanzhi Mao ◽  
Dan Liu ◽  
Aoshuang Chen ◽  
...  

Maize is one of the most important crops in the world. Heilongjiang province has the largest maize area in China. Plant-parasitic nematodes are important agricultural pests, which cause huge economic losses every year and have attracted global attention. Potato rot nematode Ditylenchus destructor is a plant-parasitic nematode with a wide range of hosts and strong survival ability in different environments, which brings risks to agricultural production. In 2020, D. destructor was detected in seven maize fields in Heilongjiang province. Morphological identification and molecular approach were used to characterize the isolated D. destructor. The observed morphological and morphometric characteristics were highly similar and consistent with the existing description. The DNA sequencing on the D2/D3 region of the ribosomal DNA 28S and the phylogenetic analysis showed that D. destructor population obtained from maize and other isolates infesting carrot, sweet potato, and potato were in subclade I supported by a 96% bootstrap value. Additionally, the phylogenetic analysis of the ITS rRNA gene sequence further indicated that this D. destructor population from maize clustered in a clade I group and belonged to ITS rRNA haplotype C. An inoculation experiment revealed that D. destructor was pathogenic on the maize seedlings in pots and caused the disease symptoms in the stem base of maize seedlings. This is the first report of D. destructor causing stem rot of maize in Heilongjiang province, and contributes additional information on disease control and safe production of maize in the region.


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