Estimation of potassium and magnesium flows in animal production in Dianchi Lake basin, China
Estimation of potassium and magnesium flows in animal production in Dianchi Lake basin, China
复制标题
中国滇池流域畜牧生产中钾镁流量估算
DOI：
10.1111/asj.12518
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发表时间：
2016
影响因子：
2
通讯作者：
Tatsuya Inamura and Hiroyuki Hirooka
中科院分区：
文献类型：
--
作者：
Yuta Amachika;Hiroki Anzai;Lin Wang;Kazato Oishi;Chagan Irbis;Kunzhi Li;Hajime Kumagai;Tatsuya Inamura and Hiroyuki Hirooka
本研究的目的是估算和评价滇池流域动物生产中钾(K)和镁（Mg）的预算和流量。在实地调查中进行了饲料抽样和农民访谈。分别计算奶牛、育肥猪、母猪、肉鸡和蛋鸡的本地和外部饲料中钾和镁的供应以及动物的滞留、生产和排泄。利用个别预算估算了区域一级的钾和镁流量。在个体水平上，在奶牛中，本地饲料提供的钾和镁占总营养摄入量的很大一部分，而在其他动物类别中，饲料中的钾和镁大部分依赖外部资源。研究结果还表明，过量摄入镁会导致奶牛和育肥猪体内镁的高排泄和低利用效率。在区域一级，该地区生产和施用的粪肥钾和镁含量（K: 339和Mg: 143 t/年）超过了当地饲料的钾和镁含量。结果表明，动物生产可能增加区域农业系统中钾、镁的负荷。
The objectives of this study were to estimate and evaluate potassium (K) and magnesium (Mg) budgets and flows of animal production in the basin of Dianchi Lake, China. Feed sampling and farmer interviews were conducted in field surveys. The supplies of K and Mg from local and external feeds and the retention, production and excretion of animals were calculated individually for dairy cows, fattening pigs, breeding sows, and broilers and laying hens. The K and Mg flows on a regional level were estimated using the individual budgets. At the individual level, in dairy cattle, the K and Mg supplied from local feeds accounted for large parts of the total nutrient intakes, whereas in the other animal categories most of the K and Mg in the feeds depended on external resources. Our findings also suggested that excessive Mg intake resulted in high Mg excretion and low use efficiency in dairy cattle and fattening pigs. At the regional level, the K and Mg amounts of manure produced and applied in the area (K: 339 and Mg: 143 t/year) exceeded those used as local feeds. Our results imply the animal production potentially increased the K and Mg loads in the regional agriculture system.