Gan day o Vn co mot nguoi dan moi trung duoc mot so luon lon Ky Nam nhung co le nhieu nguoi lam tuong do lam tram huong nhung that ra ky nam va tram huong khac nhau, ky nam dat hon tram huong gap nhieu lan, dat hon tu 10 toi 20 lan.
Nha thuc vat hoc Vo Van Chi ( tac gio cuon sach viet ve tram huong) :
tram huong va ky nam deu duoc hinh thanh tu loi cua cay gio bau.Tuy nhien chung hoan toan khac nhau.
De phan biet tram huong va ky nam nguoi ta thuong can cu vao mui thom va dang ket tinh cua dau , su hoa nhua it nhieu de nhan biet.Ky nam duoc tao thanh tu su bien doi hoan toan cac phan tu go,do do no thuong co mau nau dam hoac den, go mem gan giong nhu sap ong, nhung kho nhan thay tho go, de chim trong nuoc. Ky nam co mui thom rat ngao ngat,du da goi kin nhieu lop nhung van khong giau duoc mui thom..Vi cua ky nam gom du 4 vi chua, cay, ngot , dang.Dot ky nam thi khoi len thang va cao , lo lung lau trong khong khi. Ky nam duoc chia thanh 4 loai, gom Ky Bach: rat hiem va quy, mau xam nhat,tinh dau tich tu deu khap tho go tao thanh khoi mau xam,bong mo nhu dau.; Ky Thanh: mau den nhanh co anh xanh luc, mui thom rat de nhan biet; Ky Huynh: mau vang sam; Ky Hac : mau den bong nhu mac in,mem va deo hon ba loai tren.
Trong khi do tram huong duoc tao thanh tu go it tam nhua hon,do vay co mui thom it hon, go co mau nau hay soc (chi) nau den.Tram co vi dang, trong luong nhe, noi tren nuoc duoc,go tram co van dam nhat va don song.Khi dot tram cho mui huong nhe, khoi tram ket xoay,tan nhanh trong khong khi.
Tram huong duoc phan lam sau loai chat luong tu 1-6.Loai 1 la hang xin , gia rat dat.Loai 6 la hang xo.Do hinh dang,kich thuoc ,mau sac, trong luong va huong vi ma tram huong duoc goi bang nhieu ten khac nhau nhu: tram mat tu,tram mat dao,tram bong,tram da bao,tram diep la,tram diep trai,tram bo sanh, tram kien xanh,tram kien lon.Tram boi duoc tu nhung dong go muc cua cay gio chet kho tu lau duoc goi la tram ruc.
Trich tu bao TTCN ngay 7/5/06