STUDY ON EFFECTS OF SUPER ABSORBENT POLYMER AMS-1 ON GROWTH, DEVELOPMENT AND YIELD OF RAMIE (BOEHMERIA NIVEA (L.) GAUD) IN THANH HOA PROVINCE

Abstract

This study was carried out in 2019 to evaluate the effects of AMS-1 super absorbent polymer on a ramie variety AP1 in Thanh Hoa. The experiment included 5
treatments with different doses of AMS-1 (0, 30, 50, 70 and 90 kg ha-1), in which the treatment with 0kg AMS-1 was the control. Results showed that soil moisture content inceased with the increase of the amount of AMS-1. Soil moisture content was the highest with the treatment of 90kg ha-1AMS-1 (23.21% at 5 days after planting and 27.64% at harvesting time). Aplication of AMS-1 increased the growth of rami plant. Application of AMS-1 at the dose of 90kg ha-1 gave the highest rami fresh yield of 27.8 tons ha-1. However, the value cost ratios of all the treatments were relatively low (<2), indicated that economic efficiency of using AMS-1 was low at the first harvesting.