不同生境对结缕草种子产量的影响

研究了青岛胶州不同生境下野生结缕草种子产量性状的变化.结果表明:阳坡的生殖枝和营养枝的单株重量和整体重量均比平地和崖边上的高;阳坡光照强度大,结缕草生殖枝数最多,明显多于平地和阴坡,且与两者在0.01水平上有差异;阳坡、东西缓坡、平地上结缕草抽穗数、抽穗率较高,未火烧、林间的较低.平地上的结缕草草层高度、生殖枝高度、叶片长宽、花序长度与人行道(人在草地上踏出的小路)上的在0.01水平上有差异;人行道上的结缕草种子数/花序、成实率较高,花序长度最短,千粒重最小,且后两者均分别与其他生境的在0.01水平上有差异.

Effects of Environment on Seed Yield of Zoysiagrass(Zoysia japonica)

Changes of seed yield and botanical characters of zoysiagrass in different environment at Jiaozhou from 2002 to 2003 were studied.The results showed that the individual and overall weight of fertile tillers and tillers on solar slope were heavier than that on the flat and near cliff.The fertile tillers on solar slope were obviously more than that on flat and lunar slope,because more sunlight intensity was received.Ear emergence amount and rate of zoysiagrass were higher on flat,solar slope,and east and west slope than those on no-burning fields and boscage.The height of plant and fertile tillers,length and width of leaf,length of inflorescence on flat were significant different with those on footpath(P<0.01).Significant difference(P<0.01) also occurred in the length of inflorescence,which were the shortest(2.51 cm),and thousand seed weight of zoysiagrass,which were the lightest(0.6150 g),on footpath than those on the other habitat.However,the seeds and inflorescence percentage on footpath were higher.