Improvement method for seed yield of mother tree in Pinus massoniana seed orchard

Abstract

The invention discloses an improvement method for seed yield of a mother tree in a Pinus massoniana seed orchard. The method comprises the following steps: step 1, clearing tree disks in every spring, and spreading quicklime powder before raining; step 2, applying organic fertilizer, potash fertilizer and boron fertilizer in furrows before a cone expansion period; step 3, applying nitrogen-phosphorus-potassium compound fertilizer after harvesting cones; step 4, collecting pollen and carrying out artificial supplementary pollination in male-female-flower full-bloom stage; and step 5, carrying out artificial supplementary pollination in the flowering period of male and female flowers. Practical application shows that the improvement method for seed yield of the mother tree in the Pinus massoniana seed orchard provided by the invention can significantly improve the seed yield of the mother tree in the Pinus massoniana orchard, the fruiting rate of Pinus massoniana is increased by 135% to 324%, and yield per plant of the Pinus massoniana is significantly higher than yield per plant of reference Pinus massoniana; in addition, the method also can slow down aging of the Pinus massoniana, improve pest and disease resistant ability of the Pinus massoniana, effectively save fertilizers and manpower, reduce production cost of the seed orchard and provide an effective way for promotion of high yield and stable yield of the Pinus massoniana seed orchard.

Description

technical field [0001] The invention belongs to the field of tree seed orchard cultivation, and in particular relates to a method for increasing the seed yield of a parent tree in a masson pine seed orchard. 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 Masson pine, but the degree of improved species of Masson pine plantation in my country is not high, one of the main reasons is that the yield of improved species in seed orchards is not high. At present, after more than 30 years of development, the primary seed orchard of Masson pine is gradually showing signs of aging, serious fruit drop, and low fruit setting rate. The production of the seed orchard is often managed acco...

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Problems solved by technology

According to statistics, 16.9% of the forest stock volume in southern my country comes from Masson pine, but the degree of improved species of Masson pine plantation in my country is not high, one of the main reasons is that the yield of improved species in seed gardens is not high

At present, after more than 30 years of development, the primary seed orchard of Masson pine is gradually showing signs of aging, serious fruit drop, and low fruit setting rate. The production of the seed orchard is often managed according to the method of timber forest, and there is a lack of mother trees for seed orchards specifically for the purpose of seed production. Systematic research on management has resulted in senescence of the mother tree and low seed yield, which has seriously hindered the production of improved varieties of Masson pine

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