摘要
为提高沿淮洼地农业经济与生态效益,探讨农业结构优化评价标准与量化指标。首先对沿淮洼地农业生态条件、农牧业结构及其相互链接现状进行了分析;提出用单位耕地年产可消化生物量(DBYHY)作为评价标准,论述以其优化种养结构,促进秸秆饲用化、牧草与饲料作物生产以及评价粮食安全的科学性。探讨以总消化养分校对值(TDNc)作为筛选、建立DBYHY生产模型的量化指标,得出在沿淮洼地不同种植模式下TDNc数值排序为:水花生>稻-黑麦草轮播>紫花苜蓿单播>2/5黑麦草+3/5苜蓿混播>稻-麦轮播>稻-油轮播>玉米-油轮播;一季的花生>水稻>油菜。
To improve agricultural economic benefits and eco-efficiency in low-lying land along the River Huai,the evaluating quantitative indexes in agri-structure optimization were investigated.The agriculture ecosystem and agri-structure actuality in the region were analyzed first.The new term ＂Digestible Bio-mass Yield per Hectare per Year＂（DBYHY） is given as an evaluation index and the scientific value of DBYHY to agri-structure optimization,farm straw feeding,forage grass production and food security ensuring is discussed.For the first time,the correct Total Digestible Nutrients（TDNc） formula was found together with its value for estimating the DBYHY.The size of the TDNc value in the region decreases from floatgrass to rice-rye,alfalfa,2/5 rye＋3/5 alfalfa,rice-wheat,rice-rape,corn-rape,peanut,rice and rape.
出处
《草业学报》
CSCD
北大核心
2010年第2期218-226,共9页
Acta Prataculturae Sinica
基金
国家科技支撑计划(2007BAD89B10-5-7)
安徽省农业综合开发项目"安徽沿淮洼地农业结构调整"共同资助
关键词
沿淮洼地
秸秆饲用
牧草生产
粮食安全
单位耕地年产可消化生物量
总消化养分校对值
low-lying land along River Huai
farm straw feeding
forage grass
food security
digestible bio-mass yield per hectare per year
correct total digestible nutrients
