不同水分处理对野生早熟禾种子萌发特性的影响

用3%、5%、10%、15%、20%、23%,6个水分处理,研究了水分对8个野生早熟禾种子萌发特性的影响,旨在为野生早熟禾的引种驯化和草坪建植提供依据。结果表明:8个野生早熟禾种子的发芽率、发芽势、发芽指数、苗长、根长和鲜苗重均随土壤含水量的增加呈先增大后下降的趋势;肃南草地早熟禾的发芽率、发芽势和发芽指数在土壤含水量5%时最大,其他7个材料在10%时最大,且显著高于同种其他水分处理(P<0.05);小药早熟禾和硬质早熟禾在土壤含水量10%时幼苗最长,其他6个材料在土壤含水量15%时幼苗最长;土壤含水量5%时8个野生早熟禾的幼根均最长;水分梯度过高或过低都会明显抑制早熟禾的鲜苗重。

Effects of moisture treatments on seed germination characteristics of wild Poa

Seeds of 8 wild Poa materials collected in Gansu Province under different moisture gradients were used study the effect of moisture on germination characteristics in order to provide the basic information for the domestication.The results indicated that the germination rate,germination potential,germination index,seedling height,root length and fresh weight showed a pattern of rising at beginning and then decreasing with the increase of moisture gradients;The germination rate,germination potential and germination index of seeds collected in Sunan were the highest under 5% of moisture,while those of the rest reached the highest under 10% of moisture,and they were significantly higher than other moisture treatments.The seedling height of Poa micrandra and P.sphodylodes were the highest under 10% of moisture,while other reached the highest under 15% of moisture;The root length reached the largest under 5% of moisture;The fresh weight were significantly inhibited when the moisture was too high or too low.