Study on characteristics of blooming and seed setting of Desmodium tiflourum

The blooming and seed setting characteristics of Desmodium tiflourum in the whole growing period were studied. The result indicated that D. tiflourum could blooming in entire year and had two significant blooming stages. The first lasted 75 to 80 days from April to June and the second was from September to October which lasted 62 to 65 days; Pollen viability in the first and second blooming stages were 72.34% and 87.23%, and the first was significantly lower than the second. Pollen fertility in the first and second stages was 92.60% and 93.72%. The number of pollen falling on the stigma in the first and second stages was 5.86 and 5.77, and no significant difference was found. The duration of a pod getting maturated was 28 to 31 days, the bearing phrase lasted from May to November and the peak stage of the seed setting was from October to November. The optimal soil type that suitable for D. tiflourum was laterite, and the seed setting rate and pod setting number were the highest.