红薯是我县主要的作物,在粮食生产中占有重要位置。提高红薯产量,不但能够增产粮食,还能为发展畜牧业提供大量的青、粗饲料来源。根据“多效唑”能够提高光合效率,增强抗旱能力,以及增加产量等效应,我们将“多效唑”应用于红薯生产上。在三个点、分二个时期、三种浓度作叶面喷施,进行田间正规试验。试验结果达到预期效果。 一、能显著抑制主蔓伸长,促进侧蔓生长。使用“多效唑”后茎蔓增粗,叶片增厚,并明显延长叶片功能期,提高光合效率。红薯不同生育时期,喷施不同浓度“多效唑”均有抑制主蔓伸长功能,促进侧蔓增生,并随浓度提高,其抑长促枝效应也趋显著。试验结果表明:其一,插后30天和插后60天施 Sweet potato is my county’s main crop, occupies an important position in food production. Increasing sweet potato production will not only increase grain output, but also provide large quantities of green and coarse feed sources for the development of animal husbandry. According to “Paclobutrazol” can improve photosynthetic efficiency, enhance drought resistance, and increase yield and other effects, we will be “paclobutrazol” used in sweet potato production. In three points, two periods, three concentrations of foliar spray for field trials. Test results to achieve the desired results. First, it can significantly inhibit the elongation of the main vine and promote the growth of the side vine. After using “Paclobutrazol”, the stems were thicker and the leaves thicker, which significantly prolonged the functional period of the leaves and increased photosynthetic efficiency. Different concentrations of “Paclobutrazol” sprayed at different growth stages of sweet potato could inhibit the elongation of main vine and promote the proliferation of lateral vine, and with the increasing of concentration, the effect of promoting growth and promoting branch also became significant. The test results show that: First, 30 days after insertion and 60 days after insertion