The Research On Chinese Ecotone Between Agriculture And Animal Husbandry And Population Distribution

Ecotone between agriculture and animal husbandry is the region where agricultural regions and husbandry regions transact each other. In this region, there are always two or several production ways; what's more, this region always not only has the common features of these two transact regions, but also has some special characteristics. From the view of ecology, the ecotone between agriculture and animal husbandry is also the ecological transact, which has important significances to some factors representing ecological environment, and also plays vital roles in the monitoring global changes. However, due to the interferences of human beings and the great changes of natural environment, the ecological environment of this ecotone has deteriorating. Consequently, it loses the effect of ecological environment barrier; oppositely, it has becoming the ecological environment fragile zone and effects the neighbor agricultural and husbandry region. Finally, this kind of effect spread to the whole country.From the other aspect, the ectone between agriculture and animal husbandry not only reflects the changes of ecological environment, but also reflects the difference of the population in the eastern and western regions. The line between agriculture and animal husbandry which is made on the basic of the ecotone, reflects the features of the population distribution in China:more people are now living in the eastern whereas eastern part has less land; however, the western part which has more land feeds less people. The distribution of this line accords with the population distribution pattern which was published by Professor Huhuanyong several years ago, and it is also reckoned as the correction and supplement of the Huhuanyong Line. In other word, this line is the more detailed line than Huhuanyong Line, and is the population distribution line and the ecological changing line.On the basic of ecotone published by Professor Chen quangong and ZhangJian, combining the statistical materials of agricultural region, animal husbandry region and the self-agricultural region and the self-animal husbandry region determined by ministry of agriculture during 2004-2009, the paper made the new ecotone between agriculture and animal husbandry in the view of the relations between of population and the ecotone. The newly developed ectone origins from Heilongjiang province, crossing Jilin province, Hebei province, Beijing, Shanxi province, Shanxi province, Ningxia province, Gansu province, Qinghai province, Sichuan province, terminals at Yunnan province, with the total area of 794480.741km2. Connecting the middle points of this ecotone, the line between agriculture and animal husbansry was generated. Secondly, on the basic of population census data of 2005, using the inverse distance weight method, the Chinese population spatial distribution raster picture was generated by interpolating the population point data of the mainly cities and counties in China in 2005. Thirdly, based on the new ecotone and population distribution image, the "Line From Aihui to Tengchong" puts forward by Huhuanyong was corrected to generate the new Chinese population distribution line.The results showed that the western part of this population distribution line has 53.3% land of the whole country feeding 16.8% of the whole population; whereas, the eastern part has 46.7% of the land and 83.2% of the whole population, which accords with the pattern put forward by Huhuanyong. The farming land, forest and grassland is the 15.33%,35.2% and 39.32% of total area of the ecotone separately. What's more, comparing with the agricultural regions, the ecotone had less farming land and more grassland when comparing with the animal husbandry region. This kind of feature could be reflected significantly in Neimenggu, Gansu province and Sichuan province. Due to the statistical data of 2006, China had 592 national poverty countries,56.3% among this were in ecotone between agricultural and animal husbandry. The Ningxia and Neimenggu province's majority poverty counties all lied in the ecotone, while the counties of Jilin and Hebei province lying in ecotone were all poverty counties, which meant the first thing to be done to developing poverty counties and improving the living standard of poverty regions was taking measures to protect the ecotone region.