The research on the nursing of rice seedling in the soil-bed for transplanter
W. H. Lee
The purpose of this study is to deal with the experiments related to the techniques of raising rice seedlings in the boxes for the use of rice transplanter. These experiments covered in this paper were: (1) the evaluation of the possibility of different kinds of soil used as the material for seed-bed. (2) The screening test on the chemicals for controlling the disease of rice seedling rot (Fusarium wilt). (3) The comparison of water managements in nursery stage. The experimental results are summarized as follows:
1. For nursing rice seedling the loam soil that has 5 to 6 pH value is the best. The higher the pH value of soil, the easier the occurrence of seedling rot, when temperature was low and water supply was not enough.
2. The most effective control of the seedling rot was to use the 1000 times diluted solution of Taehigalan, sprayed on the seeds and soil after seeding and before top soil was covered.
3. The optimum amount of seeds per box for Kuboda-transplanter was from 250 gram to 300 gram and for Yama-transplanter from 170 gram to 180 gram.
4. The required fertilizer per box was 8 gram-8gram-4gram for ammontuml sulphate, calcium super-phosphate and potassium chloride respectively.
According to these results, a preliminary technique of nursing seedling by soil-bed in box was established.