Seedling method for promoting growing of nursery stock lateral roots

Abstract

The invention discloses a seedling method for promoting growing of nursery stock lateral roots and belongs to a plant breeding method. The method includes that (1) collected and mixed seeds of water oaks and apocarya are disinfected and hidden in sand; (2) germinated seeds are taken out successively in next early spring; (3) after a part of radicles of the germinated seeds is cut, the germinated seeds are transplanted into a clean sand bed, a plastic tunnel is covered on the sand bed and used for preserving heat and moisture so as to promote germinating of seed embryos and growing of radicles; and (4) when seedlings of the seeds emerge, the seedlings are transferred from the sand bed, a part of newly grown roots are cut again, and the seedings are planted in a field according to certain strain row gaps. In a sand hidden period and a germination accelerating period of forest tree seeds, measures of cutting parts of radicles of the embryos twice are taken, a large amount of lateral roots and fibrous roots are seduced to grow at the root breaking positions of seedling main roots, and the number of the lateral roots and the fibrous roots are increased by 100-350%. Increasing of root system area promotes growth and development of the seedlings, proportion of portions of the seedlings above the ground and under the ground is adjusted, and survival rate of afforestation of seedling transplanting is improved. The method has wide application and popularizing prospects in nursery stock cultivating of deep-root tree varieties.

Description

technical field [0001] The invention relates to a technique for sowing and raising seedlings of forest trees, in particular to a propagation method for promoting the growth of lateral roots of seedlings by sowing and raising seedlings. Background technique [0002] Seedlings propagated by forest tree seeds generally have well-developed taproots and fewer lateral and fibrous roots. Especially for some deep-rooted tree species, such as walnut, oak and other trees, the root length of the main root of the seedlings is usually 1 to 2 times the height of the seedlings, and its root system is commonly called "carrot" root; the lateral roots and fibrous roots of such tree species are very few, The survival rate of afforestation transplantation is extremely low, which brings huge losses to forestry production. In the traditional seed sowing and seedling raising method, although the sprouts are cut once when the seeds emerge and transplanted, for deep-rooted tree species, the charact...

AI Technical Summary

Problems solved by technology

Especially for some deep-rooted tree species, such as walnut, oak and other trees, the root length of the main root of the seedlings is usually 1 to 2 times the height of the seedlings, and its root system is commonly called "carrot" root; the lateral roots and fibrous roots of such tree species are very few, The survival rate of afforestation transplantation is extremely low, which b