Effect of bed soil with polypropylene spunbonded fabrics on rice seedling production

摘要

The study of this experiment is focused on labor saving of healthy rice seedling production using PSF (polypropylene spunbonded fabrics) as thermal protection material. Several factors such as different compositions of nursery soil and PSF materialswere tested to produce healthy rice seedlings. The inner thermal protection material in PE film (polyethylene film) showed 0.9 approx 1.7 deg C higher than that of PSF 40 approx 100 gm~(-2). The light transmittance-ratio also showed similar trends. It is considered that the appropriate PSF material density was 40 gm~(-2) in accordance with economic values and healthy rice seedlings. Plant height and dry weight according to various nursery soil showed the ranges of 8.5 approx 14.2 cm and 5.5 approx 10.0mg, respectively. In composition of nursery soil, artificial soil combined with paddy soil was effective in producing healthy seedling for rice seedling production. The total sugar content also showed the difference between PSF 40, 60 gm~(-2) PE film (0.43 approx 0.52 mg FW g~(-1)) and PSF 80, 100 gm~(-2) (0.28 approx 0.35 mg FW g~(-1)) and it showed the same tendency among varieties as well as various nursery soil. These results demonstrate that PSF 40 gm~(-2) economically affordable, and can be recommended as thermal protection material for producing good healthy rice seedling.