不同生境条件对羊草无性繁殖密度的影响

Effect of Different Habitat Conditions on Clonal Density of Leymus chinensis L.

采用野外调查取样、实验室测量相结合的方法,对宁夏首次引种栽培的羊草BG-2、B群体的无性繁殖密度进行研究。结果表明:羊草不同群体不同生境条件下,影响无性繁殖密度的主要因子是根茎芽发生强度与分蘖芽发生强度。其受种植地土壤肥力状况、生境条件的影响较大。在生境条件较差地区种植羊草应加施底肥,同时,要适时追施氮、磷肥。

A study was conducted on the clonal density of BG-2 and B group of Leymus chinensis L.firstly introduced and grown in Ningxia adopting the method combining field investigation and sampling and laboratory measurements.The result show that the main factors affecting the clonal density of different groups of Leymus chinensis L.under different habitat conditions are rhizome bud intensity and tiller bud intensity.It is affected greatly by the soil fertility status of the planting land and the habitat conditions.The base fertilizer should be applied when Leymus chinensis L.is grown in the area with relatively poor habitat conditions and in the mane time nitrogen and phosphate fertilizer should be dressed.