Method for reforming low-yield turf pine forest

Abstract

The invention discloses a method for reforming a low-yield turf pine forest. Aiming at the problems of poor genetic quality and lacking high-quality provenance of the turf pine forest, eupatorium adenophorum spread and soil erosion caused by high-strength intermediate cuttings, difficult survival of forestation nursery stock and the like, the low-yield turf pine forest is reformed into a Yunnan pine forest by using seedling culture with high-quality Yunnan pine nutrient bags, low-strength three-times tending and intermittent cutting of the turf pine forest, digging and soil preparation and artificial creation of a Yunnan pine container seedling mode so as to solve the problems of loss of soil and water, eupatorium adenophorum spread and poor artificial forestation quality during reforming, improve the genetic quality of the Yunnan pine and improve the forest quality and the forestation benefit. The method for reforming the low-yield turf pine forest is particularly suitable to be applied to reformation of the low-yield forest of a Yunnan pine distribution region.

Description

technical field [0001] The invention relates to a technology for transforming degraded forest stands, in particular to a method for transforming low-efficiency ground pine forests. Background technique [0002] Pine pine is a variant of pine yunnanensis. The difference between pine pine and pine yunnanensis is that pine pine is shrub-like, with clusters of stems, 1-2m high (individually up to 5-6m), and slow growth. Ground pine forest is a major vegetation type formed after the degradation of Yunnan pine forest, and it is the most common in Yunnan Province, especially in the middle reaches of Jinsha River and central Yunnan. In the past, during the long-term management of Yunnan pine forests, because the harvesting of Yunnan pine forests mainly selected tall, straight individuals, the remaining low-quality individuals in the forest were usually low-quality individuals with twisted trunks, and these individuals were regenerated through natural seed fall. , so that the newly ...

AI Technical Summary

Problems solved by technology

In the past, during the long-term management of Yunnan pine forests, because the harvesting of Yunnan pine forests mainly selected tall, straight individuals, the remaining low-quality individuals in the forest were usually low-quality individuals with twisted trunks, and these individuals were regenerated through natural seed fall. , so that the newly formed individual genetic quality and stand quality continue to decline, and finally form a low and distorted pine forest; in addition, in the process of artificial afforestation of Yunnan pine, in some places, some low-growing Yunnan pine forests were selected for convenience when collecting seeds and raising seedlings. Seed collection, seedling cultivation and afforestation of Pine pine or even Pine pine, the resulting artificial forests grow slowly, have distorted stem shape, low yield, poor economic benefits, and lack of cultivation prospects. These natural and artificial stands are especially important in Yunnan Province The middle reaches of the Jinsha River and central Yunnan are the most common and one of the types of forests that urgently need to be transformed in natural forest management

In the past, there was a lack of in-depth research and effective transformation methods for the transformation of pine forests on the site, mainly through enclosure protection, allowing them to grow and regenerate naturally, or carrying out full-scale clearcutting or high-intensity clearcutting followed by artificial afforestation for transformation.

The above two methods are difficult to achieve good transformation results. The former transformation method is difficult to be replaced because of the lack of high-quality provenance sources of Pine yunnanensis in the land pine forest, and the continuous regeneration and reproduction of inferior land pine forests. Therefore, it takes a long time to rely on natural succession to restore The effect is not good for a long time; the latter method, through clearcutting or high-intensity selective felling, will lead to a significant decline in the canopy density of the forest land after felling, causing serious soil erosion in the forest land, and Eupatorium adenophorum. Spread, the planted Pine yunnanensis seedlings are affected by the competition of Eupatorium adenophorum, the lack of soil nutrients and water, and the lack of side shade in the early stage of seedling growth, resulting in low survival rate of afforestation, slow growth of afforestation seedlings, and unsatisfactory transformation effect