桉树主栽品种与乡土树种混交技术研究

针对当前我国桉树人工林纯林经营存在的林分结构单一、土壤地力衰退和系统稳定性弱等问题，开展桉树与红锥、火力楠、闽楠等阔叶用材树种混交栽培研究，探明桉树混交林经营3.5年后的单株桉树树高和胸径生长量均高于桉树纯林；土壤理化性质、微生物群落结构、土壤酶活性和林分水源涵养功能均有改善。还研究了桉树混交林的空间结构与均质性、叶面积指数和冠层开度特征，发现了混交林的空间结构、捕获与截取光的能力均优于桉树纯林；明确桉树与伴生树种混交比例为2:1或3:1的林分稳定性更高。

Aiming at the issues including single stand structure, soil fertility decline and weak system stability in the pure stand management of Eucalyptus plantations in China, this study carried out mixed cultivation research on Eucalyptus with broad-leaved timber tree species such as Castanopsis hystrix, Michelia macclurei and Phoebe bournei. It was found that after 3.5 years of mixed stand management, the height and diameter at breast height (DBH) growth of individual Eucalyptus trees in the mixed stands were higher than those in pure Eucalyptus stands; meanwhile, the soil physical and chemical properties, microbial community structure, soil enzyme activity and stand water conservation function were all improved. Additionally, the spatial structure and homogeneity, leaf area index (LAI) and canopy openness characteristics of Eucalyptus mixed stands were studied, and it was revealed that the spatial structure and light capture and interception capacity of the mixed stands were superior to those of pure Eucalyptus stands. Furthermore, it was clarified that stands with the mixing ratio of Eucalyptus to companion tree species being 2:1 or 3:1 exhibited higher stability.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于桉树主栽品种与乡土树种（如红锥、火力楠、闽楠）的混交技术研究，旨在解决桉树纯林经营中林分结构单一、土壤地力衰退等问题。研究发现，混交林在生长量（树高和胸径）、土壤理化性质、微生物群落、水源涵养功能及空间结构方面均优于纯林，并明确了2:1或3:1的混交比例能提高林分稳定性。数据集覆盖2016-2020年，属于植物学领域，通过协议共享提供，数据量13.5 MB，源自国家重点研发计划项目“桉树高效培育技术研究”。