摘要
采用样地调查和土壤采样分析方法,对林口县青山林场榛子(Corylus)天然林土壤养分特征进行研究,探讨不同林分密度榛子天然林土壤养分特征,旨在为榛子天然林的可持续经营提供理论依据。结果表明,随着土层深度的增加,土壤有机质和碱解氮含量减少,速效钾和速效磷含量表现为表层最高。在0~10 cm和10~20 cm土层中,土壤有机质、碱解氮和速效钾含量在650~2 500株/hm^2密度范围内均呈现出随林分密度的增大而先增加后减少的变化趋势,且均为1 900株/hm^2密度含量最高;速效磷含量则分别表现为随林分密度的增大而降低的变化趋势。当榛子天然林林分密度在1 900株/hm^2时,0~30 cm深度土壤的有机质和碱解氮含量均表现为相对较高的水平;综上所述,以土壤养分为评价指标,研究地区榛子天然林适宜的保留密度为1 900株/hm^2。
By using sample surveys and soil sampling methods, the soil nutrient characteristics of natural Corylus in Qingshan Forest Farm in Linkou County was studied, and the soil nutrients in natural stands of Corylus with different stands densities was investigated, which could provide the theoretical basis for the sustainable management of natural Corylus forest. The results showed that with the increase of soil depth, the content of soil organic matter and alkaline nitrogen decreased, and the content of available potassium and available phosphorus was the highest in the surface layer. In the 0-10 cm and 10-20 cm soil layers, the contents of soil organic matter, available nitrogen and available potassium in 650~2 500 plants/hm2 showed a trend of increasing first and then decreasing with the increase of stand density, and the highest density content was 1 900 plants/hm2. The available phosphorus content showed a decreasing trend with the increase of stand density. When the density of natural Corylus stands was 1 900 plants/hm2, the organic matter and alkali-hydrolyzable nitrogen in soils at depths of 0-30 cm were relatively high. In summary, with the evaluation index of soil nutrients, the appropriate density of natural Corylus forest in the study area was 1 900 plants/hm2.
作者
刘建明
姚颖
刘忠玲
吕跃东
Liu Jianming;Yao Ying;Liu Zhongling;Lv Yuedong(Forest Science Research Institute of Heilongjiang Province,Harbin 150081)
出处
《森林工程》
2018年第3期1-5,共5页
Forest Engineering
基金
国家科技支撑课题(2015BAD07B03)
