基于农户的肉羊农牧生态系统氮素循环与平衡研究  

Nitrogen Cycling and Balance in the Farmer Household's Agro-animal Husbandry Ecosystem

作　　者：王宝海[1] 张琪[1] 张呈军[1] 康康[1] 陈玉林[1] 

机构地区：[1]西北农林科技大学动物科技学院,陕西杨凌712100

出　　处：《家畜生态学报》2006年第5期96-100,共5页Journal of Domestic Animal Ecology

基　　金：陕西省科技攻关项目(编号:2004K02-G11-01);世界银行项目资助

摘　　要：在调查陕西省铜川市耀州区三个乡（镇）260个农户种植业、养殖业及其它副业现状的基础上，本文将当地农户分为3种类型，并对其作物生产氮素利用及投入产出情况进行了分析；同时，结合农户作物生产和肉羊养殖实际，设计了三种典型农户肉羊农牧生态系统，分析表明：在农户耕地面积0．67-1．20hm^2、饲养8．83～17．67个羊单位条件下，粮、经、饲作物种植比例为40：15：45时，农户肉羊农牧生态系统内的氮素循环将达到动态平衡，且与调整前相比，作物氮素产出量平均高出91．64k/（hm^2oa），氮素产投比平均提高了17．65％，农田有机氮再循环系数平均提高了123．53％，良性养分循环指数平均提高了156．52％，每只肉羊养殖效益平均增加130元。该设计模式值得在研究区及类似生态区域大力推广。Based on investigating data of planting counties, Yaozhou District, Tongchuan City, the article industry, animal raising industry and other sidelines in three analyzed N application and input and output of plants production by dividing the farmers into three types：small, medium and large scales. The results showed that N cycling of the ecosystem was dynamic balance under the circumstances of feeding 8.83 - 17.67 goats per unit on the farming area of 0.67 - 1.20hm2, the propotion of 40 ： 15：45 for gain to economic crop to forage. Moreover, in contrast to the situation before adjustment, the N output increased 91.64 kg/（hm^2oa）in average, N input/output went up 17. 65% than the average,the recycling coefficient of positive mutrient raised 156.52% ,the profit for each goat increased 130 Yuan. It shows that this mode is worth popularizing in the researching area and similar ecological area.

关 键 词：种植 肉羊 氮素 生态系统 

分 类 号：S811.5[农业科学—畜牧学]