15)N-labelled green manure mixed with nitrogen-free starch was used to
feed pigsin the study.The results showed that
the amount of ￣(15)N transformed into the
bodiesof the two slaughtered pigs
accounted for 23.51% on average,of the total amountof￣
(15)N
deposition in the experimental diet taken by each pig.The￣(15)N excreted thr-ough the
feces and urine of the two pigs accounted for 23.85% and 28.76% ,respe-ctively,of the total
amount of ￣(15)N deposition in the feed(green manure)of pigs,The average recovery of total
￣(15)N for the two pigs was 76.12%. At the same time,the mean digestibilities of
carbohydrates for two pigs was 75.63%。The results ofrice micro-plot experiment showed that
the amount of ￣(15)N transformed from pig fecesand urine into whole rice plant accounted for
3.75% and 7.25% of the total amountof ￣(15)N deposition of the feedgreen manure
respectively,of which 2.5 1% and 4.82%of the total ￣(15)N were transformed into rice
grain,respectively.The pig bodies andrice 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 andurea where rice grain recovered 26.65% of the ￣(15)N -labelled green manure N.