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Nitrogen fertilizer application method of field-raised seedling of Larix olgensis

A technology of Changbai larch and its application method, which is applied in the field of nitrogen fertilizer application for field seedling cultivation of Changbai larch bare-root seedlings, can solve problems such as the influence of biomass nitrogen content, unfavorable transplanting or afforestation effects, and unguaranteed nutritional requirements, and achieve nitrogen The effect of increased content, good lignification, and full terminal buds

Inactive Publication Date: 2012-06-20
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

As the rapid growth of Changbai larch can last until mid-September, if the nutritional requirements of the seedling hardening period cannot be guaranteed, the biomass and nitrogen content of the seedlings will inevitably be affected, which is not conducive to the transplanting or afforestation effect of the seedlings in the next year

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  • Nitrogen fertilizer application method of field-raised seedling of Larix olgensis
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  • Nitrogen fertilizer application method of field-raised seedling of Larix olgensis

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Embodiment Construction

[0015] (1) Processing method 1

[0016] 1) Seed treatment Before the winter solstice, the seeds were mixed with snow in a volume of 1:3 and stored in the cellar. Take it out on April 30 (late April of the following year), and use 0.5% KMnO 4 Soak the seeds in the solution for 2-3 hours, then rinse them with clean water, then mix with the seed coating agent, put them in a warm place for 4-5 days to accelerate germination, and then about 1 / 3 of them will be white.

[0017] 2) Seedbed production On May 1, in an area suitable for the growth of long white larch seedlings, select a sandy loam nursery with deep soil and good drainage. 5% phorate granules (200kg / hm 2 ) and FeSO 4 ·7H 2 O powder (500kg / hm 2 ) mixed thoroughly and sprinkled on the soil surface. Use a rotary tiller to turn the soil, and then make a north-south seedbed, and at the same time spread diamine (25-35kg / hm 2 ) and cover with soil about 5cm. The height of the seedbed is 0.12m, the width is 1m, and the le...

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Abstract

The invention mainly relates to a nitrogen fertilizer application method of field-raised seedling of larix olgensis, which belongs to the fertilizer application technology of naked root seedling culture. A method for applying the fertilizer in autumn is adopted, after a terminal bud of the larix olgensis tree seedling is formed, about 30kg / hm<2> nitrogen fertilizer is applied every time respectively in the middle of September and in the beginning of October, twice fertilizer application interval is two weeks, and the accumulated application quantity of the nitrogen fertilizer is 60kg / hm<2>. Biomass and nitrogen content of the larix olgensis seedling after the fertilizer application are respectively 0.40g / seedling and 8.75mg / seedling; and the height of the seedling can reach 10.7cm, the leading thread can reach 2.54mm, the terminal bud is plump, lignification is good, and nitrogen content inside the tree seedling is remarkably increased. Due to the adoption of the method, the best application quantity of nitrogen fertilizer in autumn is 60kg / hm<2> for larix olgensis naked root seedling, and the method for applying the nitrogen fertilizer in autumn is adopted to continuously supply nutrition to the seedling, so the specification and the nitrogen content of the seedling can be increased, and the coldness resistance of the seedling can be remarkably improved.

Description

1. Technical field [0001] The invention relates to a fertilization method for field seedling cultivation of forest trees, in particular to a nitrogen fertilizer application technology for field seedling cultivation of bare root seedlings of long white larch. 2. Background technology [0002] After planting seedlings for afforestation, the new roots of seedlings grow slowly at the initial stage, and their ability to obtain nutrients from the soil is low. Their survival and growth mainly depend on the internal transfer and redistribution of stored nutrients in the body. Therefore, in the cultivation process of seedlings, it is particularly important to cultivate seedlings with sufficient nutrient content, and nutrient loading of seedlings through reasonable fertilization is an effective way to solve this problem. [0003] Nutrient loading of seedlings during their rapid growth in spring and summer is well known and applied. But in autumn, the seedlings enter the lignification...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00A01C21/00
Inventor 祝燕李国雷刘勇蒋乐史文辉
Owner BEIJING FORESTRY UNIVERSITY
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