Grain logistics under emergencies*: the decision-making framework for the emergent allocation of grain reserves based on scenario responses
Chinese Rural Economy,No. 12
【Abstract】 In order to strengthen China’s grain reserve logistics capability, this paper systematically illustrated how logistics could better guarantee the security of grain from the perspective of evolution and development. This paper also put forward the concept of grain logistics under emergencies, and subdivided its functions and activities. We finally summarized the decision-making framework of the emergent allocation and delivery of grain reserves under emergencies in China. The framework took the scenario construction as the policy guide, the logistics preparation as the decision-making guarantee, the information system as the decision-making support, and scenario understanding, plan design and action implementation as the decision-making steps, thus pursuing the coordination and integration of multi-targets including timeliness, economy and reliability to ensure the grain security under emergencies. Among them, the scenario construction emphasized the deduction process with a combination of data collections from multiple channels and forward and backward logical inference, while the logistics preparation emphasized the system upgrade of organizations, carriers, information and other logistics factors. The decision-making steps emphasized the sequential characteristics of scenario understanding, plan design and action implementations, and formed a circular structure with the scenario evolution.
The effect of different grazing intensities on hyperspectral remote sensing and locust abundance in typical steppe
Plant Protection,Vol 43,No. 06
【Abstract】 To study the correlation between the normalized difference vegetation index (NDVI) of typical steppe and above-ground biomass and locust abundance in the Inner Mongolia grasslands with different grazing intensities, the reflectance spectra and above-ground biomass were measured by spectrometer in five different grazing treatments. The results indicated that the models of NDVI and above-ground biomass with different grazing intensities were correlated significantly: y = 0.034 8 + 0.002 9x (R2 = 0.645 5, P = 0.000 2), and the locust abundance was y = −0.067 + 0.013x (R2 = 0.415, P = 0.006). The effects of grazing intensities on the abundance of locust and plant parameters with NDVI were examined with redundancy analysis (RDA). The results showed that the aboveground biomass, plant height and Cleistogenes squarrosa biomass were the main factors of locust abundance and NDVI, among which the significant factors was above-ground biomass (P = 0.001). There was a significant positive relationship between NDVI and the abundance of locust. Above all, we can provide a theoretical basis for remote sensing monitoring of locust plague in grazing regions, and scientific and rational use of grassland resources.
West Asia and Africa,No. 03
【Abstract】 Food is closely related to the survival and development of every country and plays a vital role in a country’s regime security and stability. As an important part of non-traditional security, food security is also an essential component of developing countries’ governance. The livelihood deficit characterized by food security is one of the root causes of political and social instability in Africa. In Egypt, resource-based poverty and regime-based poverty lead to Egyptian food security. As a political power in Arab countries, Egypt always boasts the largest population, which makes Egypt face a great pressure from food supply. As a result of the imbalance of economic development, the agricultural development lags far behind and food outputs cannot catch up with the population growth, leading to Egyptian food crisis in the long run. What is more, it is also a serious problem of national governance. Egypt has experienced a transformation from food self-sufficiency to food import. The natural factors, national policies and technological levels have a great influence on Egypt’s food security, which leads to a contradiction between food supply and demand, as well as the issue of food import and high food prices. With the development of industrialization and urbanization, the problems of population expansion, high food demand, shortage of arable land and water resource shortage are gradually emerging in Egypt, which aggravates the burden of food supply. Therefore, Egypt needs to control the scale of the population moderately, make the effort to develop agriculture and raise farmers’ living standards so as to solve the food shortage radically.
Biodiversity Science,Vol 25,No. 04
【Abstract】 Both the species diversity and distribution pattern of the superfamily Acridoidea of the suborder Caelifera have important contributions to understanding the local biodiversity of Baiyangdian Wetland. This research tried to study the species diversity and distribution pattern of the superfamily Acridoidea within the Baiyangdian Wetland and test the feasibility of DNA barcoding in species identification for this superfamily. The sequences of the cox1 gene were obtained from 97 individuals of 21 species of Acridoidea. Phylogenetic, genetic distance and sequence difference threshold analyses using the neighbor-joining (NJ), automatic barcode gap discovery (ABGD) and molecular defined operational taxonomic units (MOTU) methods, respectively, were performed for these and the 25 additional sequences of 10 species downloaded from GenBank. The results indicated that there were 34 species, 23 genera, and 6 families of the superfamily Acridoidea around the farmland, dam, and grassland of Baiyangdian Wetland, including a new-record genus, Euchorthippus, and three new-record species, Euchorthippus unicolor, Atractomorpha psittacina and Oxya japonica. The DNA barcoding technology therefore is very efficient and helpful for identifying the species of the superfamily Acridoidea, although the morphological approach is still playing a key role in the species identification.