Đánh giá khả năng chịu mặn tăng dần của cỏ thức ăn gia súc lông tây (Brachiaria mutica), cỏ Paspalum (Paspalum atratum) và cỏ Setaria (Setaria sphacelata) trong điều kiện thí nghiệm

Abstract

The study was conducted in the net house to evaluate salt tolerance capacity of Para grass, Paspalum grass and Setaria grass which were grown in hydroponics condition with Hoagland solution. NaCl was added to get five levels of 0, 5, 10, 15 and 20‰, with a weekly increment 5‰ was added into the solution until reached the level of 20‰. The experiment was arranged in a completely randomized design with three replications. The results showed that the NaCl level of 15‰ and 20‰ affected the growth of the three studied species, but did not affect survival rate of Para and Setaria grass. Chlorophyll content (SPAD unit) was increased in Para grass and was remained in African grass, whereas it was reduced in Paspalum grass. Para grass accumulated the highest proline content in leaves tissues. The results indicated that salinity tolerance capacity of Paspalum grass is lower than that of Para grass and African grass; therefore, the later two species were the potential species for fodder production in the coastal area or salt-affected soils in the Mekong Delta.