本試驗之目的在了解恒春分所牧草地雜草族群，以平行分布、垂直分布及牛羊傳布三方面進行研究，平面分布以目視之剪草區與放牧區，調查各種雜草之種類及數量。結果剪草區之雜草以禾本科為主，主要為強生草、星草及藍莖草。放牧區則以藍莖草、含羞草及長穗木為主。垂直分布而言，剪草區之雜草種子分布在地下0-40cm之間，重量及種類均少。放牧區亦以地表下0-40cm分布最多，種類複雜，禾本科、豆科、蓼科及其他科均有。而不論剪草區或放牧區，平行分布或垂直分布，均以粘性土壤之雜草種類與數量較砂質土為多。牛為主要傳播雜草之家畜，其傳播以禾本科雜草為主。

The object of the experiments was to understand the weedsecology of pasture in Heng-Chun Station of TLRI. The horizontaland vertical distribution of weeds and the weeds transplanted bycattle or goat were also studied. The results indicated that amountof Gramineae weeds mainly were Johnson grass, star grass , bluestem grass and others. In the grazing pasture, we found blue stemgrass , Mimosa pudica and Stachytarpheta jamacensis. The verticaldistribution of weeds in pasture for mowing were found at 0-40cmunderground , their kinds and quantities were very few. The weedswere also distributed at 0-40 cm underground in the pasture forgrazing , and the kinds and quantities were much more than thosein the pasture for mowing. Cattle is the most important animal fortransplanting the weeds , especially for the Gramineae weeds.