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首页> 外文期刊>Biomass & bioenergy >Long-term biomass production and nutrient uptake of birch, alder and willow plantations on cut-away peatland
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Long-term biomass production and nutrient uptake of birch, alder and willow plantations on cut-away peatland

机译：荒地上桦树，al木和柳树人工林的长期生物量生产和养分吸收

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摘要

The leafless above-ground biomass production of planted silver birch (Betula pendula), downy birch (Betula pubescens), grey alder (Alnus incana), indigenous willows (Salix triandra and Salix phylicifolia) and an alder-willow mixture growing on a cut-away peatland area in Central Finland was investigated during a period of 18 (willows) or 19 (birches and alders) years. Biannual fertilization of the birches (0, NPK) and alders (0, PK) and annual fertilization of the willows (NPK1, NPK2) were continued for 10 years. S. phylicifolia had the highest yield (123 t ha~(-1)). The yield of the fertilized downy and silver birch was 112 t ha~(-1) and 108 t ha~(-1) respectively, and that of fertilized grey alder 85 t ha~(-1), and alder S. triandra mixture 93 t ha~(-1). The mean annual increment of willow was highest at the age of 10 years (S. phylicifolia 7.9 t ha~(-1) a~(-1); S. triandra 5.6 t ha~(-1) a~(-1)). NPK-fertilization increased the 19-year biomass production of downy and silver birch by 14 and 29 t ha~(-1) respectively and PK fertilization that of alders by 25 t ha~(-1). The alder plantations bound more N, P, K, Ca and Mg per unit leafless biomass produced after 10-11 growing seasons than the silver birch and downy birch plantations. The silver birch used more N, K and Ca, but similar amounts of P and Mg per unit leafless biomass produced than the downy birch. S. triandra used more N, P, K and Mg per unit biomass produced than S. phylicifolia and both birch species.
机译：种植的白桦（Betula pendula），霜降的桦木（Betula pubescens），灰al木（Alnus incana），本地柳树（Salix triandra和Salix phylicifolia）的无叶地上生物量生产以及在切块上生长的al柳混合物在18年（柳树）或19年（桦木和al木树）中调查了芬兰中部的泥炭地。桦木（0，NPK）和al木（0，PK）的两年一次施肥以及柳树（NPK1，NPK2）的年度施肥持续了10年。葡萄球菌的产量最高（123 t ha〜（-1））。施肥的绒毛和白桦的产量分别为112 t ha〜（-1）和108 t ha〜（-1），而受精的灰al木的产量为85 t ha〜（-1）和al木的混合物93吨〜（-1）。柳树的年平均增幅在10岁时最高（S. phylicifolia 7.9 t ha〜（-1）a〜（-1）; Triandra Sandra 5.6 t ha〜（-1）a〜（-1） ）。氮磷钾的施肥使绒毛和桦木的19年生物量产量分别增加了14和29 t ha〜（-1），al木的PK施肥使al木的生物量产量增加了25 t ha〜（-1）。在10-11个生长季节后，木人工林的单位无叶生物量中的N，P，K，Ca和Mg比白桦和绒毛桦木人工林更多。白桦使用的N，K和Ca含量更高，但每单位无叶生物量所产生的P和Mg的含量与绒毛桦相似。三角链霉菌每单位生物量生产的氮，磷，钾和镁的含量均高于链球菌和两种桦树种。

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