異葉銀合歡播種後3個月進行苗木選拔，選取苗木中生長最佳之前5%為優質苗，生長最差之5%為劣質苗，栽植於嘉義農專社口農場之山坡地上，採優劣苗小區逢機配對排列，四年生的資料顯示：各年齡之高生長和胸徑生長，優質苗均有高於劣質苗的趨勢。以學氏t－檢定法測驗兩者各年齡之高生長和胸徑生長，除栽植後第l年差異不顯著外，第2、3、4年生高生長兩者呈顯著之差異；胸徑生長也於第4年起，優質苗之林木顯著大於劣質苗之苗木。因此，異葉銀台歡之造林必須於小苗期選拔優勢生長之苗木出栽，而丟棄劣質苗不用。
After 3 months of seeding, the top 5% superior and the bottom 5% inferior seedlings of Leucaena diversifolia were selected for growth comparison. Both types of seedlings were planted in radomized pairing plots on slopes at Sher-Ko Farm of Chia-Yi Agricultrue College. The 4-year-old data inticates that in all ages the trees from superior seedlings performed better than those from inferior seedlings in both height and DBH growth. The Student t-test also revealed from second year, the height growth of superior and inferior seedlings were significantly different from each other. For 4th year, the DBH growth of trees from superior seedlings was also observed to be significantly different from those of inferior ones. Therefore, selecting of superior seedlings from nursery is recommended before planting of Leucaena diversifolia.
