Method for improving habitat of native tree species in Karst

Abstract

The invention discloses a method for improving the habitat of native tree species in Karst. The method includes the steps of increasing the total amount of soil, conducting soil management method andperforming legume plant interplanting. To increase the total amount of the soil, a retaining wall is built up around dog bone trees to create a microhabitat suitable for the growth of dog bone wood; the soil management method includes the steps of covering the junctions of trunks and roots of the dog bone wood with weeds or litters, burying covering material into the soil every autumn and then covering again with new weeds, opening a ring-shaped, radial trench around the trees, placing a mixture of soil and water retention agent under the ground of the trench, placing decomposed compost, mud or other fertilizer thereon with other ages of trees not needed to be fertilized, and covering the top with weeds or litters; for legume plant interplanting, soybeans and peanut legumes are interplanted with certain line spacing under a dog bone tree forest, and plant nitrogen fixation is used to increase soil nitrogen content. The method for improving the habitat of the native tree species in Karst has the advantages of being strong in operation, significant in effect, broad in application prospects, and generally suitable for Karst vegetation restoration areas with poor local habitat conditions.

Description

technical field [0001] The invention relates to the technical field of plant resource utilization, and more specifically relates to a method for improving the local habitat of dogbone tree, a pioneer species of karst vegetation restoration, and is especially suitable for karst peak cluster depression areas. Background technique [0002] In the karst area of ​​Southwest my country, the soil layer is shallow, the rock exposure rate is high, the soil nutrient content is high but the total amount is small, and because of the strong permeability of the rock and poor soil water holding capacity, the karst habitat has obvious drought stress and nutrient limitation, and it is difficult to restore vegetation. very big. At the same time, affected by human grazing and firewood cutting, most of the well-developed evergreen and deciduous broad-leaved mixed forests and some seasonal rainforests have been degraded into the current secondary forests and shrubs, and some have even degraded in...

AI Technical Summary

Problems solved by technology

[0004] Cornus wisoniana is a native tree species in karst peak-clump depressions. It shows good ecological adaptability in revegetation applications, but it shows low growth rate and low growth rate in local habitats with shallow soil, low nutrient content and drought. Phenomena such as small old trees affect the stability of the karst dogbone plant community

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