少花蒺藜草全生育期生长特性研究

Study on Growth Characteristics of Cenchrus Pauciflorus Benth. in the Entire Growth Period

为了研究少花蒺藜草的入侵特性,对科尔沁区辽河西人工疏林草地中少花蒺藜草种群全生育期生物学特性进行调查.结果表明:少花蒺藜草于5月下旬出苗;6～7月份生速最快;7月20日抽穗;7月25日开花结实,根长、叶数、根数不再增加;8月10日株高达到最大,为41.81±1.20cm;8月30日单株生物量达到最大,分别为20±1.45g(地上)、12±0.67g(地下),单株结实数为151±21个.

In order to study the invasion characteristics of field sandbur （ Cenchrus pauciflorus.Benth.）, this paper focus on the bilogical characteristics of field sandbur population in the entire growth period in the west Liaohe of Horqin district. The results showed that： field sandbur appeared in late May in the community, and grew fast from June to July; heading on July 20; flowering and fruiting on July 25, root length, number of leaves, root number no longer increased at this period; The plant was the heightest （41.81 ± 1.20cm ）on August 10; The maximum individual biomass were 20 ± 1.45g （ground）, 12± 0.67 g （underground）, seed per hill of field sandbur 151 ± 21 on August 30.