甘肃中部地区秸秆资源产量及潜力估算

Estimation of the quantity and potential of strawresources in central Gansu Province

摘要:

“粮改饲”试点的甘肃中部地区属农牧交错区,农作物秸秆资源丰富,草食家畜饲草需求量大,秸秆饲料化利用势在必行。以中部地区2012~2016年主要农作物的经济产量为依据,采用草谷比和可收集系数法,估算甘肃中部地区秸秆可收集利用量;以草食家畜日均采食量为标准,测算秸秆载畜发展潜力。结果表明:甘肃中部地区可收集秸秆资源总量为252.80万t,其中玉米秸秆占比72.51%,秸秆资源呈增长趋势;可收集秸秆实际载畜量为345.15万羊单位,理论发展潜力为577.17万羊单位,秸秆载畜牧业发展潜力巨大。关键词:秸秆;草谷比;畜牧承载力;发展潜力;甘肃中部

Abstract:

The central area of Gansu Province,which is a ‘grain-to-feed’ pilot,is an agro-pastoral ecotone with abundant crop straw resources and a large demand of herbivores for forage,therefore,the utilization of straw for feed is imperative.Based on the economic output of the main crops in the central region from 2012 to 2016,the grass-grain ratio and collectable coefficient method were used to estimate the amount of straw collected and utilized in central Gansu;the average daily feed intake of herbivores was used as the standard to measure the development potential of straw livestock-carrying.The results showed that the total amount of straw resources collected in central Gansu was 252.80 million tons,of which corn stalks accounted for 72.51%,the straw resources showed an increasing trend in the past 5 years;the actual carrying capacity of straws was 3.451 million sheep units,and the theoretical development potential was 5.771 million sheep units,the development potential of straw livestock-carrying industry is huge.