Ảnh hưởng của các nồng độ NPK tới sinh trưởng và một số chỉ tiêu sinh lí của cây lan Dendrobium lùn (Dendrobium sp.)

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Tác giả: Thị Hải Yến Bùi, Phi Bằng Cao, Thị Bích Ngọc Chu, Thị Mận Lê, Phương Quý Nguyễn, Thị Thanh Hương Nguyễn, Thị Mai Lan Trần, Thị Thanh Huyền Trần, Trung Kiên Trần

Ngôn ngữ: vie

Ký hiệu phân loại: 612.799 Hair and nails

Thông tin xuất bản: Khoa học và Công nghệ - Đại học Thái Nguyên, 2019

Mô tả vật lý: 115-120

Bộ sưu tập: Metadata

ID: 492273

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Dinh dưỡng có ảnh hưởng lớn tới sinh trưởng, sinh lí của thực vật. Công trình này hướng tới nghiên cứu ảnh hưởng của các nồng độ NPK tới sinh trưởng và một số chỉ tiêu sinh lí của cây lan Dendrobium lùn (Dendrobium sp.). Trong nghiên cứu này, một số nồng độ phối hợp NPK khác nhau được phun qua lá gồm các công thức thí nghiệm CT1 (10:30:10), CT2 (10:10:30), CT3 (6:30:30), CT4 (10:30:30). Kết quả nghiên cứu cho thấy rằng cả bốn nồng độ phối hợp NPK đều có tác động tích cực đối với sinh trưởng chiều cao thân, chiều dài và chiều rộng lá. Đồng thời, hàm lượng chất khô trong cây lan Dendrobium lùn cũng cao hơn ở các công thức có xử lí nồng độ phối hợp NPK so với ở công thức đối chứng. Bên cạnh đó, sự tăng hàm lượng chlorophyll a, chlorophyll b, chlorophyll tổng số và carotenoid trong lá cũng được quan sát ở cây lan Dendrobium lùn được xử lí NPK so với ở cây không được xử lí. Trong đó, nồng độ phối hợp NPK=10:30:30 có tác động tích cực nhất tới sinh trưởng, hàm lượng chất khô và hàm lượng sắc tố quang hợp của cây lan Dendrobium lùn. Kết quả nghiên cứu này gợi ý nồng độ phối hợp NPK=10:30:30 có thể được sử dụng trong chăm sóc phong lan Dendrobium lùn.Nutrient has an important influence on growth and physiology of plants. This work aims to study on effects of NPK levels on growth and some physiological indices of miniature Dendrobium (Dendrobium sp.) In this study, four NPK levels were applied by foliar spraying on Dendrobium plants, including CT1 (10:30:10), CT2 (10:10:30), CT3 (6:30:30), CT4 (10:30:30). The results showed that all four NPK levels had significantly positive effect on plant height, leaf length and leaf width. Dry biomass content of NPK treated miniature Dendrobium plants was higher than non treated ones. In addition, an increase in content of chlorophyll a, chlorophyll b, total chlorophyll and carotenoid was observed in leaves of NPK treated plants in comparison to non-treated plants. NPK=10:30:30 levels had the most positive effect on growth, dry biomass content and photosynthetic pigment contents of miniature Dendrobium plants. These study results suggested that NPK=10:30:30 could be used in producing miniature Dendrobium orchids.

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