Analysis of Utilization Potential of Major Crop Straws and Livestock Manure in Jiangxi Province
This paper analyzed the spatial distribution characteristics of major crop straws and livestock manure in Jiangxi Province and their resource utilization potential,in order to promote the effective use of agricultural waste.Based on the spatial statistical analysis method of GIS,this study estimated the amount of major crop straws and livestock manure generated and their theoretical values of resource utilization in each county(city,district)of Jiangxi Province in 2021,and analyzed their spatial distribution patterns and cold hotspot areas.The results showed that in 2021,the total amount of major crop straw which could be collected in Jiangxi Province was 23.868 2 million tons,and the straw type was mainly rice straw.It generally showed the characteristics of rich in the north and poor in the south,mainly concentrated in the northern part of Poyang Lake Plain,and its theoretical value was equivalent to 11.337 4 million tons of organic carbon,227 000 tons of N,31 600 tons of P,420 800 tons of K,6.613 6 million tons of standard coal or 3.05×109 m3 methane gas.The annual production of livestock manure was 70.652 3 million tons,of which poultry manure produced the most,accounting for 40.27% of the total amount of livestock manure.It generally presented a north-south poor,central rich characteristics,theoretically equivalent to 9.746 3 million tons of organic carbon,487 000 tons of N,175 300 tons of P,315 900 tons of K,11.581 million tons of standard coal,or 8.26×109 m3 methane gas.There were 14 hotspots for crop straw,11 hotspots for livestock manure,and 5 double hotspots for straw-livestock manure at 99% confidence level.Crop straw hotspots should realistically choose direct return to the field,basal material utilization,fertilizer utilization,energy utilization,feed utilization,raw material utilization,mushroom farming and other suitable utilization direction,livestock manure hotspots should comprehensively consider the development of biogas or way of on-site return to the field recycling,straw-livestock manure double hotspots should consider the multi-level,diversified utilization pattern,giving priority to the integration of agriculture and animal husbandry,and the development of eco-agriculture.
国家科技期刊平台
NSTL
万方数据
