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作 者 ：何电源,廖先苓

期 刊 ：生态学报 1994年 14卷 2期 页码：113~120

关键词：N15；氮循环；稻田土壤－作物－家畜系统。；

Keywords:N15, nitrogen cycle, paddy soil-crops-domestic animals system.,

摘 要 ：本文用N¹⁵标记水稻和绿肥研究了稻田土壤－作物－家畜系统中氮的循环。N¹⁵标记稻草喂羊，羊体回收饲料稻草N 31.16%，羊粪28.26%，羊尿5.72%，总回收65.14%，损失34.86%。将羊粪尿单施，稻谷回收饲料稻草N3.19%，水稻全株回收4.82%，土壤残留19.00%，损失10.14%。故羊体、水稻及土壤残留共回收饲料稻草N54.98%．将羊粪与尿素配施，则饲料稻草N的总回收率为55.88%。N¹⁵标记绿肥喂猪；猪体回收饲料绿肥N23.51%．猪粪23.85%，猪尿28.76%，总回收率76.12%，损失率23.88%。将猪粪、尿还田，稻谷回收饲料绿肥N6.69%，水稻全株回收10.05%，土壤残留19.17%，故猪体、水稻和土壤残留共回收饲料绿肥N52.73%，将猪粪与尿素配施，则饲料绿肥N的总回收率为52.75%。

Abstract:This paper deals with the use of N¹⁵-labelled rice straw and green manure to study the cycle of N in the crops-domestic animal-paddy soil system.When a N¹⁵-labelled rice straw was used to feed goats. the total N recovery was 65.14%, including 31. 16%in bodies,28. 26%in feces and 5.72% in goat urine.Then the goat feces and urine were retuned topaddy field and 4.82% N¹⁵ was recovered in whole rice plants ,inciuding 3. 19%in ricegrain,19.0% of N remained in soil ,and 10.14%of N was lost.In the two pro...

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