Method for improving planting survival rate of pinus massoniana grafting seedlings

Abstract

The invention discloses a method for improving the planting survival rate of pinus massoniana grafting seedlings. Rootstocks are cultivated by using non-woven bags which are easy to decompose and a conventional light tree medium; the tops of the rootstocks are slightly shorn after the rootstocks are grafted to survive by utilizing the advantage that the grafting survival rate can be ensured because the grafting seedlings which are managed in a centralized manner in a nursery garden are not affected by weather; the seedling transportation and forestation cost is reduced because the seedlings are small; the rootstocks are trimmed twice after the rootstocks are planted on a mountain; finally, the grafting seedling planting survival rate is obviously improved. According to the method, the forestation effect of the grafting seedlings can be improved; the large-scale production forestation cost can be reduced effectively; the economic value is improved; moreover, the method is simple, convenient, and easy to learn, and low in cost; an effective means is provided for popularization and large-scale production of excellent clones of pinus massoniana; the method is of an important practical significance to a pinus massoniana seed orchard, a gene pool, and the large-scale forestation use of the pinus massoniana grafting seedlings.

Description

technical field [0001] The invention belongs to the field of improved tree species cultivation, and in particular relates to a method for improving the survival rate of grafted seedlings of masson pine. Background technique [0002] Masson pine is the most important fast-growing and high-yielding timber forest species in southern China, and has made great contributions to the area of ​​fast-growing forests, standing stock and timber production in southern my country. According to statistics, 16.9% of the forest stock in southern my country comes from Pinus massoniana. In addition, the whole body of masson pine is full of treasures, which has a very high comprehensive utilization value, among which pine resin is the most valuable except wood. Masson pine research began in the 1980s. After decades of development, a large number of excellent clones have been selected and bred, and a large number of masson pine improved varieties have been produced through the establishment of ...

AI Technical Summary

Problems solved by technology

However, it generally takes 2-4 years to complete the construction of the garden, and it takes 1.5-2 years to manage the rootstocks in the woodland, which greatly increases the cost.

Although, in recent years, grafted seedlings have been grafted in the nursery and planted directly up the mountain, which can reduce the cost to a certain extent, but due to the wrong method, the mortality rate of more than 50% has been caused, which has brought great difficulties to the construction of the garden.

[0003] In Guangxi, the best time for masson pine grafting is from November to January of the next year, and the rainy season is mainly from March to April. According to the conventional method, after the rootstock of the grafted seedlings is completely pruned, and then planted up the mountain after growing up, the best time will be missed. planting time, the survival rate is not guaranteed

In addition, the long-term management in the nursery makes the root system of the rootstock go deep into the soil, and the root system must be cut off before moving, which seriously affects the survival rate of the uphill

Conventional methods use plastic cups and soil to cultivate rootstocks, which is not conducive to the growth of rootstocks, the soil is easy to disperse during transportation, the soil disperses when the plastic cup is removed, and the soil is easy to be trampled during the stepping process after planting. important factors in planting

Also, if the planting density in the nursery is high, if the grafted seedlings are too high, it will cause most of the grafted seedlings to lack sunlight, resulting in slow growth, and some will even die slowly.

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