A kind of nitrogen application method for cork oak container seedlings

Abstract

The invention mainly relates to a nitrogen fertilization method for cork oak container seedlings, which belongs to the fertilization technology for forest tree container seedlings. Adopt the index fertilization method to apply nitrogen fertilizer to the cork oak container seedlings, start to apply nitrogen after the cork oak germinates, and end in mid-September, apply nitrogen once a week, and the nitrogen application amount increases exponentially each time, and the cumulative nitrogen application amount is 125mg / strain. The biomass and nitrogen content of the container seedlings of Quercus variabilis were 5.29g / plant and 73.14mg / plant respectively, and the nitrogen absorbed by the seedlings accounted for 58.5% of the amount of nitrogen applied; mm, reached the requirements of qualified seedlings. The present invention determines that the optimum nitrogen application rate for oak cork container seedlings is 125 mg / plant, adopts the exponential fertilization method, and the nitrogen application rate increases exponentially each time, and the amount of nutrients provided to the seedlings is synchronous with the growth and development requirements of the seedlings, thereby making the seedlings specifications and nitrogen content reached a maximum.

Description

1. Technical field [0001] The invention relates to a fertilization method for container seedlings, in particular to a nitrogen fertilizer application technology for cork oak container seedlings. 2. Background technology [0002] Nitrogen fertilizer is one of the most important fertilizers in the process of plant growth and development, and the rational application of nitrogen fertilizer to seedlings is particularly critical. Exponential fertilization is a steady-state nutrient loading technology, mainly used in nitrogen fertilizer application. During the growing season of the seedlings, nitrogen fertilizers are applied to the seedlings multiple times, and the amount of nitrogen applied each time increases exponentially. The amount of nutrients provided to the seedlings is synchronized with the growth and development requirements of the seedlings, so that a large amount of nutrients are accumulated in the seedlings. After the seedlings are reforested, the nutrients stored in...

AI Technical Summary

Problems solved by technology

In terms of production, the nitrogen fertilizer is made into an aqueous solution with a concentration of 1:200-1:300 to fertilize the container seedlings of cork oak. The amount of nitrogen applied each time is equal, which is not consistent with the growth rhythm of the seedlings. It is easy to cause water pollution and fertilizer waste; and in the later stage of seedling development, the amount of nitrogen applied cannot meet the needs of container seedlings, resulting in a decline in the quality of seedlings.

At the same time, the frequency of nitrogen application varies greatly in production, so the amount of nitrogen application also varies, and the quality of container seedlings varies greatly between regions.

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