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热研2号柱花草又名184笔花豆(Stylosanthes guianensis)是一种优良的热带豆科牧草,具有适应性强,耐旱,耐酸性瘦土,耐瘠薄,抗病高产等特点。1982年引进至今,在华南地区累计种植达40多万亩。但热研2号柱花草前期生长缓慢,杂草危害严重。据Bailey(1964,1965)报道,柱花草对2,4-DB有较好的耐性,6周龄时可用2,4-BD1.65千克/公顷(酸当量)喷施除草。国内还没有柱花草化学除草方面的报道。为此,1990～1991年我们对热研2号柱花草移栽田土壤处理除草剂和叶面处理除草剂进行了筛选试验,现小结如下。
Stylosanthes guianensis is a kind of excellent tropical leguminous forage grass. It has many characteristics such as strong adaptability, drought resistance, acid-proof lean soil, barren resistance, disease resistance and high yield. Since its introduction in 1982, more than 40 million mu have been planted in southern China. However, hot research column 2 flowers early growth slow, serious weeds. As reported by Bailey (1964, 1965), Stylosanthera is more tolerant to 2,4-DB and is herbally sprayed with 2,4-BD 1.65 kg / ha (acid equivalent) at 6 weeks of age. There is no report of column herb chemical weeding in China. Therefore, from 1990 to 1991, we conducted a screening test on soil herbicides and foliar-treated herbicides in the transplanting field of column flower of Heshan No.2, which are summarized as follows.