冬闲田单混播草地地上、地下生物量和总生物量动态及其相关性分析

冬闲期,在云南省晋宁县对多花黑麦草与光叶紫花苕按不同比例混播的草地地上生物量、地下生物量和总生物量等指标进行了测定与相关分析,结果表明:多花黑麦草与光叶紫花苕混播(1.7 g/6m2+10.3 g/6m2)草地地上生物量可以达到13 534.28 kg/hm2,与其他处理差异不显著,粗蛋白产量达到2 589.27 kg/hm2,显著高于单播黑麦草(p<0.05)。草地地上生物量和总生物量随生长时间呈指数曲线变化,地下生物量随生长时间呈对数或幂函数曲线变化,并且地上生物量、地下生物量和总生物量三者之间具有显著的相关关系(p<0.01),地上生物量与总生物量之间表现出线性正相关,地下生物量与总生物量之间的相关曲线为指数或幂函数型,地下生物量与地上生物量之间也呈现出指数函数或幂函数关系。

Correlated analysis and dynamic study on biomass of artificial grassland in winter paddy field

In winter,the aboveground biomass,underground biomass and total biomass of grassland of Lolium multiflorum L.+Vicia villosa Roth var.glabresens sowed in different percentage were studied and analyzed in Jinning county of Yunnan province.The result showed that the aboveground biomass was 8 760.08kg/hm2 and there were no significant difference among seven treatments;the crude protein yield of Lolium multiflorum L.+Vicia villosa Roth var.glabresens(1.7g/6m2+10.3g/6m2)was 2 589.27kg/hm2 and was significantly higher than other treatments(P<0.05).Aboveground biomass and total biomass accumulated in the form of exponential curve,underground biomass accumulated in the form of logarithmic curve or power curve with the time going,and there were most significant correlation among aboveground biomass,underground biomass and total biomass(P<0.01).The relationship between aboveground biomass and total biomass showed a linear function,the relationship between underground biomass and total biomass showed exponential function or power function,the relationship between underground biomass and aboveground biomass showed exponential function or power function.