The Study Of The Variation In Flower And Growth Character Of Pogonatherum Paniceum

Pogonatherum paniceum is an herbage species of Graminaceae. It grows in rock, coast, bareness-terra etc that is difficult to grow for other plants. Its roots can assimilate nutrition from the deep of rock. So this plant species can be explicated in slope protection, water and soil holding. There is few research about Pogonatherum paniceum. This paper is about variation in flower and growth characteristic under different environment conditions, the results can establish theory base for Pogonatherum paniceum application.Firstly, we investigated flower variation of Pogonatherum paniceum in 8 plots and measured the number of floret, stamen and gynoecia. The results are fellow:1.1 The ratio of deficiency is 5%-85% in the first floret stamen of non-stem spikelet and the biggest deficiency in Longju-temple of lime-rock (85%). the first floret of non-stem spikelet appear pistil in north-thermal spring (30%). the second floret stamen of non-stem spikelet lose 15% in north-thermal spring and Caoshang yellow-soil. The ratio of deficiency is 20%-100% in the first floret stamen of stem spikelet and the largest deficiency is Caoshang yellow-soil (100%). On the basis of these observations,we conclude that the first floret stamen of non-stem spikelet and stamen of stem spikelet are sensitive for environment.1. 2 The range of average-value is 1.15-2.35 for sex ratio and the biggest is Qingmuguan(2.35). The range of Cv is 15.6%-58.3% in 8 plots. Results of ANOVA indicated that 8 plots were divided into three group, 1) Laifeng sun-shine slope, Laifeng shade-shine slope, Sanerya purple soil, north-thermal spring, Sanerya yellow sandstone, 2) Qingmuguan, 3) Longjushi-temple, Caoshang yellow-soil.1.3 The range of average-value is 0.25-1.6 for staminode and the biggest is Caoshang yellow-soil and the smallest is north-thermal spring. The range of Cv is from 43.1% to 244.2%, The biggest Cv appear in north-thermal spring( 177.7%) and Qingmuguan(244.2%).Others exceed 50% except for Laifeng sun-shine slope, Results of ANOVA indicated that 8 plots could be divided into three groups, l)Laifeng sun-shine slope, Laifeng shade-shade slope, Sanerya yellow sandstone, Longjushi-temple,2) Qingmuguan, north-thermal spring,3) Sanerya purple soil, Caoshang...