A kind of rejuvenation method of Chinese fir with crown buried dry method ear picking nursery

Abstract

The invention relates to the technical field of plant propagation, and provides a rejuvenation method for a cutting orchard by a burying-drying method of cunninghamia lanceolata with crown. The stepsof the cutting orchard managed for a long term are crown rebuilding and branch cutting surface rebuilding; the steps of the decayed cutting orchard due to management failure are crown rebuilding, branch cutting surface rebuilding, soil improvement and water and fertilizer management, so that the rejuvenation problem of the cutting orchard by the burying-drying method of the cunninghamia lanceolatawith the crown is solved.

Description

technical field [0001] The invention relates to the technical field of plant propagation, in particular to a method for rejuvenating Chinese fir with a crown and buried dry method for ear picking. Background technique [0002] "Sexual creation, asexual reproduction", select excellent individuals from the breeding population, and establish clones through asexual reproduction, which can make full use of individual genotype advantages; clonal afforestation is an important trend in forestry development and an important way to improve afforestation benefits . The yield and quality of spikes in Chinese fir ear picking nurseries directly affect the quality and production scale of Chinese fir clone seedlings. At present, there are mainly three types of Chinese fir ear-picking gardens: the method of burying the stem, the method of bending the stem and pulling the branches, and the method of dense planting and flat stubble. The common problems of these three types of ear-picking gard...

AI Technical Summary

Problems solved by technology

At present, there are mainly three types of Chinese fir ear-picking gardens: the method of burying the stem, the method of bending the stem and pulling the branches, and the method of dense planting and flat stubble. The common problems of these three types of ear-picking gardens are: 1. The quality of the spikes is not high, and the degree of youngness is low; 2. The yield of effective spikes is low, only about 100,000 to 200,000 per mu; the mother tree for picking spikes is easy to decay, resulting in a sharp decline in the yield of spikes, and the service life of the spikes is short, only 2-4 years

During the long-term operation of Chinese fir with canopy and buried dry method, the efficiency of photosynthesis is reduced due to the size of the canopy being controlled and the needles aging; However, it affects the quality of the spikes; due to the fast growth of the spikes in the dry harvesting garden with a crown, the short-term loss of control for several months will lead to the destruction of the picking surface and the photosynthetic surface. Therefore, long-term management after construction is required. During the management process, the decay phenomenon caused by crown aging, cutting quality decline or short-term loss of management can be remedied, and the rejuvenation of the ear-picking mother tree in the ear-picking nursery can be quickly realized in a short period of time, and the yield and quality of effective cuttings can be restored.