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文章以N、P_2O_5为标准,研究了单位面积粪污土地承载力、以奶牛日粮营养需求为标准,研究了单位面积紫花苜蓿饲草奶牛承载量,达成了土地—饲草—奶牛—粪污—土地种养生态循环,构建了紫花苜蓿饲草种植与奶牛规模化养殖之间的生态平衡模式。试验表明:10 ha多年生紫花苜蓿土地,共可承载38头奶牛的粪污,同时紫花苜蓿干草可供应82头奶牛饲草用量。并推算出,多余44头奶牛粪污可供应一定面积的燕麦—青贮玉米轮作、小麦—籽粒玉米轮作土地。
Based on N, P_2O_5 as the standard, the carrying capacity of dung land per unit area was studied. Based on the dietary requirements of dairy cows, the carrying capacity of alfalfa forage grass per unit area was studied and the land-forage-cow-dung sewage --Ecological cycle of land cultivation and ecological balance between alfalfa forage planting and dairy cattle large-scale culture. The experiment showed that the soil of 10 ha perennial alfalfa could carry a total of 38 cows’ dung while the alfalfa hay could supply 82 cows. And calculated that the extra 44 cow dung can supply a certain area of oats - silage corn rotation, wheat - grain corn rotation land.