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在广西南宁立地条件下,以正常排灌的土壤疏松条件为对照,开展以水制土制肥调节植株营养等为手段的诱导木薯开花结实及促进种子发芽等相关研究。结果表明,华南5号木薯经短暂淹水致土壤板结和短暂渍水致土壤板结处理,每株坐果数分别比对照增加20.3和18.5粒;通过淹水和渍水处理,使木薯植株体内氮素水平降低,氮素含量分别比对照低37.26%、30.79%;有效提高叶片的C/N比,淹水处理、渍水处理分别为19.71、17.70,比对照11.56高出8.15和6.14;所获杂交种子,经特殊处理催芽,发芽率达20%~60%,而常规处理尚未获得正常发芽的植株。研究内容可为广西木薯杂交育种提供技术借鉴。
Under the condition of the site of Nanning, Guangxi, with the control of soil looseness under normal irrigation and drainage as the control, the research on the water-soluble soil fertility-adjusting plant nutrition and the induction of cassava flowering and fruiting and the promotion of seed germination were carried out. The results showed that the cassava number of South China No.5 cassava increased by 20.3 and 18.5 respectively compared with the control after a short period of flooding caused by soil compaction and short-term waterlogging. Through the flooding and waterlogging treatment, the contents of nitrogen The level of nitrogen decreased 37.26% and 30.79% lower than that of the control, respectively. The C / N ratio of the leaves was effectively increased. The flooding and waterlogging treatments were 19.71 and 17.70, respectively, 8.15 and 6.14 higher than that of the control 11.56. Seeds, germinated by special treatment, the germination rate of 20% to 60%, while the conventional treatment has not been normal germination plants. The research content can provide technical reference for Guangxi cassava hybrid breeding.