摘要
本工作通过田间微区试验，研究了^（１５）Ｎ标记羊粪和稻草单独施用或分别与尿素配合施用作为水稻基肥时，肥料氮的命运及其对水稻产量的影响。结果表明，羊粪单施或与化肥Ｎ配合施用时，稻谷回收的羊粪Ｎ分别为７．９％和９．２％，相当于饲料稻草Ｎ的２．２％和２．６％，若将羊体中回收的饲料稻草Ｎ量（３１．２％）￣［６］计入，则羊体和稻谷共回收饲料稻草Ｎ分别为３３．４％和３３．７％，明显高于稻草直接还田时稻谷对稻草Ｎ的回收率（单施和与化肥配合施用时分别为９．９％和１４．５％）。稻草喂羊，再以其粪尿还田，其经济效益也明显高于稻草直接还田。
Microplot
experiment was used in a paddy field to study the fate of nitrogenand its effect on rice yield
when ￣(15)N-labelled goat feces and rice straw were appliedalone or in combination with urea
as basic fertilizer. The results showed that￣(15)Nrecovery from goat feces by rice grain
accounted for 7.9%and 9.2%,respectively,being equivalent to 2.2%and 2.6%of ￣(15)N in the
feed-rice straw respectively.Byusing rice straw to feed goats and returning the goat feces to the
field,￣(15)N reco-very by goat body and rice grain was 33.4%and 33.7%respectively,which
washigher than￣(15)N recovery from rice straw by rice grain(9.9%and 1 4.5%respecti-vely)as
rice straw was applied directly to the soils。
出处
《土壤学报》
CAS
CSCD
北大核心
1995年第3期292-299,共8页
Acta Pedologica Sinica
基金
中国科学院"土壤圈物质循环开放研究实验室"基金资助课题。
关键词
^(15)N标记羊粪
稻草还田
N素平衡账
^(15)N-labelled goat feces
Returning rice straw to soil
Nitrogen balance sheet rice straw to soil,Nitrogen balance sheet
