论文部分内容阅读
根据国内外有关研究材料,概述木麻黄防护林更新和低效林改造方面的研究进展。简要介绍木麻黄更新障碍,即更新困难、连栽导致地力和林分产量降低的问题,原因主要是木麻黄品种退化、沙地缺水肥和自毒作用。木麻黄防护林的更新方式主要有间隔带状、块状更新和林下更新等方式,防护林更新的主要措施包括更新树种选择、适生优良品系应用、加强营养管理和水分管理等方面。低效林的改造方式大致有全面改造、带状改造、隔行套种和局部补植等方式,低效林改造措施包括营建木麻黄混交林、抚育间伐、客土施肥、林带结构调控、土壤管理等方面。
According to the relevant research materials at home and abroad, the research progress of regeneration of Casuarina equisetifolia shelterbelt and transformation of low-efficiency forest are summarized. Briefly introduce the obstacles of regeneration of Casuarina equisetifolia, namely, the difficulty of renewal, and the problems of continuous yield reduction of fertility and stand production, mainly due to the degradation of Casuarina species, the lack of water and fertilizer and autotoxicity in sandy land. The regeneration methods of Casuarina equisetifolia shelterbelts are mainly belt-like, block-like and under-tree renewal. The main measures for shelterbelts renewal include the selection of tree species, the application of good-quality and good-quality strains, the enhancement of nutrient management and water management. The transformation methods of inefficient forests include general transformation, strip transformation, interplanting and partial replanting methods. The transformation measures of inefficient forests include the construction of mixed stands of Casuarina equisetifolia, tending and thinning, soil fertilization, structural adjustment of forest belt, soil management, etc. aspect.