(6(2):15-22)INVESTIGATION AND STUDY ON THE SOURCES OF THE PROTEIN FEEDSTUFFS IN TAIWAN (Third Report)- A Study on the Leucaena Glauca Seed as A Feed for Hogs (I)

銀合歡Leucaena glauca BENTH.（荳科），係綠肥作物之一，俗稱Wlld-，或Horse-Tamarind；其主要用途不但為綠肥，尚可為綠蔭樹(Shade)、海岸防風林等，其葉可為飼料應用於家畜飼養。 銀合歡子實中蛋白質含量相當可觀，唯一方面尚含有毒成份植物鹼Mimosine及其dl-體Leucenol，因而飼養家畜時時常發生皮膚炎，惹起脫毛現象等，已在1950年前後布哇農事試驗場對此銀合歡雖有進行飼料化研究，但其對象似主關青葉部份，子實部份則僅示端緒而已。 銀合歡在本省出產狀況，除部份在南部西海岸為防風林栽植外，大部仍在東臺及山地於野生狀態繁殖，其子實據稱年產數百萬噸，產量可觀，然而至今僅有部份人利用；筆者等進行本項銀合歡飼料化試驗原由即在此也。 A study was made to utilize the Leucaena glauca seed as a feedstuff for hogs. The mechanical composition of Leucaena seed was determined as meal one part and skin one part, that is one per one. The chemical constitution of seed was also analyzed; protein content of the seed was about 30 per cent and alkaloid more than five per cent, which was found only in the meal. The treatment of Leucaena seed to turn into a feedstuff was studied. No good result was obtained by the acid treatment for the yield was too small. On the other hand, however, the alkali treatment appeared to be promising. The optimal condition of chemical treatment was to boil the seed not crushed with five times (vol./wt.) water for 30 minutes, then in same amount of tenth normal sodium hydroxide solution for 30 minutes, and again in water for ten minutes. When the seed was treated by the process mentioned above except that in the final water-boiling process the cocking was stopped as soon as the water begins to boil, the amount of alkaloid decreased to one fifth, and no pure protein was lost. It is concluded from chemical analysis that the alkali treated seed is more satisfactory as a feed than non treated one, because of less toxicity and high nutrition. The feeding experiment with the alkali treated Leucaena seed on the hogs will be presented in another paper in near future