杉木套种山苍子模式的结构与生物量初步研究

对杉木套种山苍子模式及对照(未套种)的林分(5年生)地上部分结构和根系及生物量的研究结果表明,套种林分中的山苍子枝叶处于上层,0.90～1.25m处杉木和山苍子的枝叶相互交叉;山苍子根系向水平方向扩展,垂直方向和杉木根系分层分布,从而提高林地光能利用率和土壤养分利用率。套种模式林分中杉木单株生物量是对照的1.18倍,林分的生物量是对照的1.43倍。杉木套种山苍子是一种结构合理、生产力较高的南方山地杉木混农林业模式。

A Study on the Pattern Texture and Biomass of Chinese Fir Interplanted with Litsea cubeba

The stand texture on the ground, root system and biomass of the ch- inese fir interplanted with Litsea cubeba and control ( 5a. ) were studied. The result showed that the twigs and leaves of Litsea cubeba on the interplanted stand were on the upper levels, the leaves of chinese fir and Litsea cubeba were intersecting each other at a height of 0.90 to 1.25m, the root system of Litsea cubeba spreaded horizontally and distributed in different layer vertically apart from that of chinese fir, therefore the utilization ratio of light energy and soilnutrients of the interplanted pattern were raised, with the individual biomass of chinese fir being 1.18 times that of the control, the stand biomass 1.43 times that of the control. chinese fir interplanted with Litsen Cubeba has proved to be one of the chinese agroforestry pattern which has the high reasonable texture and high production in the south mountain areas.