关键词: 麻育秧膜, 机插育秧, 根际氧, 增氧栽培

Abstract: Bast fiber seedling film is a new film material used for raising rice seedling by machine transplanting. Great deals of application practice have indicated that matting bast fiber seedling film on the bottom surface of seedling plate of seedling plug machine could stimulate the growth and development of seedling root system and improve seedling quality. However, its action mechanism is still unclear. This paper measured and analyzed the micro morphological characteristics of bast fiber seedling film, and investigated the compensation effect of oxygen supply to bottom plate through directly testing oxygen concentration at the bottom surface of seedling plate, combined with simulated demonstration method. The results showed that bast fiber seedling film could quickly compensate for oxygen consumption at the bottom of seedling plate. After the external oxygen entered the hole, microporous diffusion occured in the seedling film. Then oxygen was transfered to entire film surface, where oxygen could directly contact rice roots, ultimately increase the number of root system and oxygen uptaken, and then an effect similar to aerobic cultivation was achieved.

Key words: bast fiber seedling film, rice plug and seedling machine, root-zone oxygen, aerobic cultivation