15N标记绿肥喂猪后还田的转化和效益的研究
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* 中国科学院土壤圈物质循环开放研究实验室基金


EFFICIENCY AND TRANSFORMATION OF 15N-LABELLED GREEN MANURE AFTER FEEDING PIG AND APPLYING TO PADDY FIELD
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    摘要:

    本文用15N标记绿肥与无N淀粉配制成饲料喂猪,猪体平均回收饲料15N 23.51%;猪粪回收15N 23.85%,猪尿回收15N 28.76%;饲料绿肥N的总回收率为76.12%。猪粪、尿还田,水稻全株对N的回收分别相当于饲料绿肥N的3.75%和7.25%.其中转化至稻谷的分别为2.51%和4.82%.以经济产品计算,猪体和稻谷共回收饲料绿肥15N 30.84%,比15N绿肥与尿素配施还田稻谷回收的绿肥N(为26.65%)相对地高15.7%.

    Abstract:

    15N-labelled green manure mixed with nitrogen-free starch was used to feed pigs in the study. The results showed that the amount of 15N transformed into the bodies of the two slaughtered pigs accounted for 23.51% on average, of the total amount of 15N deposition in the experimental diet taken by each pig. The 15N excreted through the feces and urine of the two pigs accounted for 23.85% and 28.76%,respectively, of the total amount of 15N deposition in the feed (green manure) of pigs. The average recovery of total 15N for the two pigs was 76.12%.At the same time, the mean digestibilities of carbohydrates for two pigs was 75.63%.The results of rice micro-plot experiment showed that the amount of 15N transformed from pig feces and urine into whole rice plant accounted for 3.75% and 7.25% of the total amount of 15N deposition of the feed-green manure respectively, of which 2.51% and 4.82% of the total 15N were transformed into rice grain, respectively. The pig bodies and rice grain recovered altogether 30.84% of the feed-green manure N, being 15.7% relativly higher than that in the plot of combined application of green manure and urea where rice grain recovered 26.65% of the 15N-labelled green manure N.

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何电源,廖先苓,周卫军.15N标记绿肥喂猪后还田的转化和效益的研究[J].土壤学报,1994,31(3):277-286. He Dianyuan, Liao Xianling, Zhou Weijun. EFFICIENCY AND TRANSFORMATION OF 15N-LABELLED GREEN MANURE AFTER FEEDING PIG AND APPLYING TO PADDY FIELD[J]. Acta Pedologica Sinica,1994,31(3):277-286.

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  • 在线发布日期: 2013-02-25
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