Ảnh hưởng của dịch chiết rong Ulva reticulata lên sự phát triển của rau muống (Ipomoea aquatic)

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Tác giả: Thị An Khúc, Thảo Hiền Nguyễn, Thị Phương Anh Trần, Hồng Cầm Văn

Ngôn ngữ: Vie

Ký hiệu phân loại: 639 Hunting, fishing, conservation, related technologies

Thông tin xuất bản: Tạp chí Khoa học - Công nghệ Thủy sản, 2020

Mô tả vật lý: 45583

Bộ sưu tập: Metadata

ID: 418009

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Chủ đề

Rong biển đã và đang được ứng dụng trong nhiều lĩnh vực khác nhau trong đó ngành nông nghiệp có thể sử dụng rong biển như một loại phân bón hữu cơ. Nghiên cứu được thực hiện nhằm mục đích khảo sát điều kiện thích hợp để thu dịch chiết rong Ulva reticulata, và khảo sát ảnh hưởng dịch chiết rong lên tỷ lệ nảy mầm, năng suất, chiều dài thân, chiều dài rễ của rau muống (Ipomoea aquatica). Kết quả khảo sát điều kiện pH và nhiệt độ thích hợp để thu dịch chiết rong biển U. reticulata cho thấy dịch chiết thu được tốt nhất là ở điều kiện nhiệt độ 120ºC/1atm (20 phút), pH = 3 hoặc 11. Không có sự khác biệt giữa các nghiệm thức có bổ sung rong biển và nghiệm thức đối chứng trong ảnh hưởng của dịch chiết U. reticulata lên tỉ lệ nảy mầm và phát triển rễ ở rau muống. Dịch rong chiết ở pH11 với nồng độ 0,5 % cho chiều dài thân tốt nhất (34,80 ± 4,69 cm) và có khác biệt với nghiệm thức đối chứng nước máy (22,00 ± 2,34 cm). Năng suất rau cao nhất thu được ở các chậu rau được bón lá bằng dịch rong chiết trong môi trường pH7 và pH11 (115,33 ± 21,94 - 137,67 ± 25,42 g/chậu), khác biệt rõ rệt so với đối chứng nước máy (52,33 ± 30,27 g/chậu) và 2 sản phẩm phân bón rong biển thương mại được thử nghiệm song song (65,7±9,7 g/chậu)., Tóm tắt tiếng anh, Seaweeds have been used in many applications including organic fertilizers. The aim of our research was to evaluate the method to extract Ulva reticulata and the effect of those extracts on the growth (germination rate, shoot length, root length) and productivity of water spinach (Ipomoea aquatica). The results showed that the optimal conditions to get extracts were 121ºC/1atm for 20 minutes at pH3 and pH11. There was no difference between seaweed-extract-added treatments and tap-water control in germination rate and root length. On the other hand, the shoot length was highest when the plants were sprayed with 0.5 % of pH11-extracted liquid (34.80 ± 4.69 cm) that was significantly different from other treatments. The highest productivity was achieved in seaweed solutions extracted in pH7 and pH11 (average over 100 g/pot), which were much higher than other controls including tap water (52.3 ± 30.2 g/pot) and commercial liquid seaweed fertilizer controls (65.7 ± 9.7 g/pot).

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