Bài viết Đánh giá chất lượng phân ủ compost qua kiểm tra chỉ số nảy mầm, năng suất và hiệu quả sử dụng đạm trên cây cải xoong Nhật (Nasturtium officinale) được nghiên cứu nhằm (i) kiểm tra độc tính của hai loại phân ủ compost, (ii) đánh giá chất lượng phân ủ dựa trên năng suất và hiệu quả sử dụng đạm trên cây cải xoong Nhật (Nasturtium officinale). | 58 Trường Đại học Nông Lâm TP. Hồ Chí Minh Evaluation of compost quality through germination index plant yield and nitrogen use efficiency on Japanese Watercress Nasturtium officinale Toan D. Tran1 Luan A. Ha1 Ngan T. Long1 Nhat X. Doan1 amp Binh T. Nguyen2 1 Students of Faculty of Agronomy Nong Lam University Ho Chi Minh City Vietnam 2 Department of Soil Science Fertilizer Faculty of Agronomy Nong Lam University Ho Chi Minh City Vietnam ARTICLE INFO ABSTRACT Research Paper This study aimed to evaluate phytotoxicity and quality of two composts based on plant yield and nitrogen use efficiency of Japanese watercress Received September 28 2021 Nasturtium officinale . The germination index GI of seeds of mung Revised December 12 2021 bean Vigna radiata L. was used to assess the phytotoxicity of compost extracts 1 10 w v at 0 10 20 and 30 days after composting. A Accepted December 31 2021 separate field experiment growing Japanese watercress was arranged in a randomized complete block design RCBD with five treatments and three replications. The treatments were NT1 soil only NT2 100 Keywords NPK chemical fertilizer NT3 100 compost A NT4 100 compost B and NT5 100 commercial micro-organic fertilizer . Treatments from Compost quality NT2 NT5 received the same amount of total applied nitrogen. Germination index Nitrogen use efficiency The results showed that composts in the preliminary study reduced the Phytotoxicity phytotoxicity of the raw materials by improving the GI from 49 to 58 - 90 . Total dissolved solids in compost A and the heavy metals concentration in compost B were both lower than permissible limits but could be responsible for limiting root growth. Two composts A and B in the experiment gave a comparative vegetable yield - Corresponding author kg 1000 m2 to chemical fertilizer but significantly lower P lt than commercial micro-organic fertilizer kg 1000 m2 . After 25 Nguyen Thanh Binh days of fertilizer application the plants used .
