扁穗牛鞭草野生资源基株生产性能指标的分析研究

Studies on production capability of genet of wild compressed limpograss

以基株为单位,对西南地区44份扁穗牛鞭草[Hemarthia compressa（L.F.）R.Br.]野生资源的10项生产性能指标进行比较研究.结果表明：不同基株生产性能指标变异很大；且生产性能指标之间有一定的相关性,茎叶比与植株的含水率呈显著的负相关,叶片含水率与茎秆含水率为极显著相关,空间分布指数与茎秆比为正相关；依据影响基株产量的第一、第二主成分分蘖数和植株空间分布范围,把供试材料分为Ⅰ～Ⅴ类,可依据生产性能类型,有针对性地对资源进行研究、选育和开发应用.

10 production indexes of genet for 44 cases of wild limpograss from southwest district of China were compared. Significant difference was observed on the productivity of these limpograss. The results indicate that every production index of genet presents a great variation. And correlations between different indexes are observed. The variance analysis of yield indexes shows that stem/lamina is significantly-negatively correlated with the moisture of genet（ r = - 0. 42563 ）, and the moisture of lamina is positively correlated with the moisture of stem （ r = 0. 69141 ）, and the space distributing index is correlated with the stem/lamina （r = 0.25985）. According to the two main production indexes （first tiller number, second space distribution）, the 44 cases of wild limpograss are classified into five types. Based on the productivity type, those resources can be studied and exploited to good purpose.