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针对人工美黑×青杨成熟防护林存在的生长衰退、防护功能下降、急需更新改造等问题,利用杨树本身的繁殖特性,通过近10 a的试验,从更新林分的条件、更新方式的选择、萌生植株管理、促进根蘖繁殖的覆土和灌溉措施以及投入成本等方面对美黑×青杨萌蘖更新进行了研究与分析,结果表明:根蘖繁殖更新效果明显优于萌芽更新和植苗更新,成活率提高13%,高生长提高33.7%~54.9%,单位面积造林成本较常规造林降低了54.6%,并提出了有效的根蘖繁殖更新配套技术。
Aiming at the problems of artificial black beauty × Qingyang mature shelterbelts, such as the decline of growth, the decline of protective function and the urgent need of renewal and transformation, etc., through the experiment of recent 10 years, , Adventitious plant management, soil cover and irrigation measures to promote root tillering and input cost were studied and analyzed. The results showed that the regeneration effect of root tillering was obviously better than that of germination and seedling renewal , Survival rate increased by 13%, high growth increased by 33.7% ~ 54.9%, afforestation cost per unit area decreased by 54.6% compared with conventional afforestation, and put forward effective root tillering breeding replacement supporting technology.