Ảnh hưởng của che sáng và phân đạm đến tỷ lệ sống và sinh trưởng của cây mun (diospyros mun a. chev - ex lecomte) ở giai đoạn vườn ươm

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Tác giả: Anh Tuân Đỗ

Ngôn ngữ: vie

Ký hiệu phân loại: 635.975 *Foliage plants

Thông tin xuất bản: Nông nghiệp & Phát triển nông thôn, 2013

Mô tả vật lý: 102-107

Bộ sưu tập: Metadata

ID: 556281

Diospyros mun AChev. ex Lecomte is a rare and high economical and conservation value tree species in Vietnam. This research evaluated the effects of shading and nitrogen fertilizer application on the survival and the growth of the seedlings of the species during nursery period. The research applied the method of split-plot design with 3 replications for two factors: shading with 4 levels (control, 25 percent, 50 percent, and 75 percent) and nitrogen fertilizer application with 4 levels of concentration (control, 0.1 percent, 0.3 percent, and 0.5 percent). The results showed that the survival and the growth of the seedlings were rather high. After 6 months in nursery, the survival percentage was stin up to 90 percent, the average values of the seeding diameter (Do), height (H), and number of leaves per seedling were 4.7 mm, 48.8 cm and 24 leaves/seedling respectively'. The experiment factors shading and nitrogen fertilizer application had significant effects on these variab'es. Of which, the optional shading level was at 50 percent, producing the best survival percentage as wen as t:qe best Do, H, and number of leaves per seedling. The most suitable application of N fertilizing was at the concentration of 0.1 percent.0.3 percent in 2 month period and at the concentration of 0.5 percent in the period from 4 to 6 months.
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