Evaluation Of Emergy Ecological Footprint Of Main Crops Straw Resources In Different Utilization Ways In Xinjiang

Many countries in the world are seeking recyclable parts in new energy and existing resources nowadays.China is an agricultural country.Crops are the main part of agriculture and produced abundant crops straw resources.Xinjiang was in the northwest of China,which has abundant crops straw resources,such as cotton crops straw,wheat crops straw and corn crops straw etc.The yield of crops straw was 4412.993 million ton only in 2015,but these crops straw resources has not been made good use of now,if these straw resources were put into utilization,it can help to relieve a series of environmental pollution problems caused by the burning of crops straw,at the same time,it also laid a theoretical foundation for the recycling management and healthy development arid of straw resource in larid agriculture,and,provided a good attempt for realize transform the agricultural development of the way into environmentally friendly and resource-saving.the following conclusions were got based on the calculation and evaluation of the ecological footprint of main crops straw resources in different utilization ways in recent 11 years in Xinjiang.(1)Calculation of ecological footprint of main crops straw resources based on different ways of utilization through the way of emergy-ecological footprint from 2005 to 2010,in Xinjiang.the results showed the per capita-total ecological footprint of main crops straw resources(cotton,wheat and corn)is 2.979 hm~2,the per capita-total ecological capacities is 2.568 hm~2,the per capita-total ecological deficit of 0.411 hm~2 in recent 11 years in Xinjiang.The values of annual average ecological footprints of main crops straw resources was 0.090 hm~2 with corresponding annual average ecological capacities of 0.078 hm~2 and annual average ecological deficit of 0.012 hm~2 in recent 11 years in Xinjiang,The per capita ecological footprint was lower than the per capita ecological capacities of wheat straw that is capita ecological surlusees in 2006.which showed that the utilization of main crops straw resources have exceeded the carrying capacity of the regional ecological economic system,and the utilization of those resource was unreasonable.(2)The change of comprehensive utilization of ecological footprint of main crops straw resources in Xinjiang during the past 11 years was analyzed in this paper,the results showed that the tendency of the per capita-total ecological footprint of main crops straw resources was rising,among with the per capita ecological footprint of cotton straw was major and obvious,the per capita ecological footprint of wheat straw was middle and the per capita ecological footprint of corn straw was least.The change of per capita-total ecological capacities of main crops straw resources was greater.The change of per capita ecological capacities of wheat straw determines the variation of main crops straw resources.The change of per capita-total ecological surlusees /deficit of main crops straw resources was coincident to the wheat straw.(3)Acording to emergy ecological footprint evaluation of Xingjiang comprehensive utilization,the per capita ecological footprint of three kinds of crop straw in Xinjiang under different utilization mode were as follows: feed > returning > life fuel > other ways > incineration > fertilizer.That was because of using the proportion of data collection is relatively difficult based on different ways of utilization.All was according to the national agricultural pollution census results of the first time in 2010 which assuming the same use proportion,then fuzzy quantitative conversion.In conclusion,the straw resources utilization was beyond the bearing capacity of regional ecological economy system in Xinjiang,utilization status of straw resourceswe need to be adjusted to reducing the straw per capita ecological footprint.In future,further scientific planning of the utilization was needed to improve the comprehensive utilization of straw resources in Xinjiang.Meanwhile,we should probe "Xinjiang model" whose economy and technology was feasible based on local conditions and make straw comprehensive utilization rate exceed 85% in 2020.