Effect of the amount of fertilizer used for basal dressing of whole fertilizer in the nursery box for cultivating paddy rice by the pool raising method
2017
Takahashi, Y. (Utsunomiya Univ. (Japan). Fac. of Agr., Research Farm) | Kurita, H. | Shibata, K. | Totsuka, Y. | Yaguchi, M.
Cultivation of paddy rice by applying whole fertilizer as basal dressing in the nursery box and sparse planting are low cost and labor saving cultivation techniques. The number of nursery boxes per unit area can be reduced by sparse planting. But, the amount of fertilizer per nursery box must be increased when combined with application of whole fertilizer as basal dressing. However, the amount of fertilizer used for application of whole fertilizer as basal dressing to the nursery box is usually less than 1 kg, and it is necessary to determine the upper limit of the amount of fertilizer that can be used in sparse planting. Therefore, using the pool raising method, we applied 'Naebako-makase' (NK301-100) as whole fertilizer as basal dressing, at the ratio of 600 g to 2500 g per nursery box, and examined the growth of seedlings, seedling mat strength, and planting accuracy in the paddy field for 3 years. As a result, seedling growth, seedling mat strength, and planting accuracy were scarcely influenced by the amount of fertilizer within 1300 g per nursery box.
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