不同种植年限香根草在煤矸石山中的形态觅食行为

为研究不同种植年限香根草在煤矸石山中的形态觅食行为,以贵州省六盘水大河煤矿2002年、2007年、2009年和2012年种植的香根草为研究对象,分别对不同生长期香根草的生物量、根长、株高、分蘖数、分蘖距离和基茎粗进行测定。结果表明:生物量、分蘖距离和基茎粗在4个生长期均随着种植年限的延长先增加后降低,种植8年(2007年种植)时达到最大。而分蘖数、株高和根长在4个生长期随种植年限的延长呈现持续上升的趋势。香根草的形态可塑性受种植时间的长短影响较大,而不同生育时期对其影响较小。从形态觅食的角度而言,利用香根草对煤矸石山进行生态治理时,其最佳修复年限为8年。

The morphological foraging behavior of Vetiveria zizanioides sown in different years in coal spoil-heaps soils

The morphological foraging behavior of Vetiveria zizanioides planted in Dahe coal mine in 2002,2007,2009 and 2012 respectively was studied by measuring the data of biomass,root length,shoot height,tiller number,tillering distance and diameter of main shoot.Results showed that the biomass,tillering distance and diameter of main shoot increased with he increase of the growing years in four growing stages until 2007 (8 years),while the tendency of decline were observed after 8 years.Tiller number,shoot height and root length increased with the increase of growing years in four growing stages.The morphological plasticity was affected by growth years but not growth stages.The estimated proper duration of ecological restoration with Vetiveria zizanioides for coal spoil-heaps soils was 8 years in terms of morphological foraging behavior.