植物生长延缓剂DPC对棉花根系活力的生理作用

棉花根系的生理活性直接影响棉株生长及体内物质代谢状况。大田栽培条件下,在根系生长盛期(蕾期)和根系吸收高峰期(花铃期)连续应用植物生长延缓剂 DPC(N,N-二甲基哌啶鎓氯化物)可以显著地增强棉株根系生理功能。结果表明:喷施 DPC 后棉株根系伤流量、合成氮基酸的能力和吸收无机磷的数量均有明显增高,同时亦增强了伤流液中细胞分裂素的活性。

THE PHYSIOLOGICAL ROLE OF PLANT GROWTH RETARDANT DPC ON THE ROOT ACTIVITY OF COTTON PLANTS

The physiological role of DPC(N.N-dimethyl-piperidinium chlo- ride)on the root activity of cotton plants(Gossypium hirsutum L.) was studied systematically under field conditions in 1985-1986.The results are summarized as follows: DPC-treated plants had more root bleeding sap than untreated plants, the synthesis ability of free amino acid in root system was increased. The contents of inorganic phosphorus and cytokinins in root bleeding sap in DPC-treated plants were higher than in control.These facts proved ...