Walnut half-a-year stock and breeding method of walnut seedlings by using half-a-year stock

Abstract

The invention discloses a walnut half-a-year stock and a breeding method of walnut seedlings by using the half-a-year stock and belongs to the technical field of forest cultivation. The breeding method of the walnut half-a-year stock comprises the following steps of: performing seed treatment on seeds bred by using the same-year seeds of juglans sigillata seedling tree as the tock, sowing the treated seeds in the ground bed in autumn in the same year, applying a plastic film and erecting a plastic film tunnel; controlling the temperature in the tunnel in the range of 16-20 DEG C before the main leaves of the seedlings spread, applying a sunshade net having the light transmittance of 20-30%, and controlling the soil moisture content in the range of 40-50%; and after the spreading of the main leaves of the seedlings and before grafting in February and March of next year, controlling the temperature in the tunnel in the range of 15-25 DEG C, the light transmittance of the sunshade nut in the range of 40-60%, and the soil moisture content in the range of 40-60%. Furthermore, the half-a-year stock bred is used as the stock to breed half-a-year stock walnut seedlings through grafting. The method provided by the invention is characterized in that the breeding time is short, and the average seedling rate of the walnut seedlings reaches up to 87.7%, which is 25.5-67.4% higher than comparison, and furthermore, the breeding cost is reduced in contrast with bud stock breeding.

Description

technical field [0001] The invention relates to the technical field of tree cultivation, in particular to a method for cultivating walnut stock and walnut seedlings. Background technique [0002] Juglans is a world-renowned economic forest tree species. Yunnan Province is one of the origins of walnuts and the main production area of ​​walnuts in the country. Its planting area and output account for about two-thirds of the country. Walnut is a "leading industry" that promotes the poverty alleviation of farmers in mountainous areas and drives the overall development of the rural economy in mountainous areas. It has become a pillar industry of forestry in Yunnan Province. In recent years, in addition to the large demand for walnut seedlings in this province, it has also been supplied to surrounding provinces such as Guizhou, Sichuan, Chongqing, and Guangxi. The annual demand for walnut seedlings is about 50 million. Therefore, the development of walnut industry cultivation is b...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the high cost of cultivating anvils in the sand bed for raising seedlings with existing bud anvils, the position of the grafting interface of the cultivated stock is relatively low, the grafting interface is easily buried under the soil when planting seedlings, affecting growth, and the rate of walnut seedling emergence from the nursery is low. And overcome the defects and deficiencies that the rootstock cultivation and walnut seedling cultivation time in the existing walnut rootstock grafting and grafting cultivation are longer, and the walnut seedling emergence rate is low. , the cultivation method of walnut half-year stock with high rate of emergence of walnut seedlings and cost reduction and the cultivation method of half-year stock walnut seedling

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