Effects of cultivated soil depth and slow-release fertilization method on the yield and quality of 'Hinohikari' rice
2018
Matsunaga, M. | Nakashima, K. | Ikejiri, A. | Uchiyama, A. | Watanabe, D. | Kaneko, K.
The higher temperatures experienced in recent years have resulted in deterioration of the quality of rice due to the occurrence of white immature grains. Thus, we aimed to establish a high-quality rice production technology to overcome this challenge. To optimize the conditions of rice cultivation, we examined the influence of the depth of plowing, type of slow-release fertilizer used, and amount of fertilizer applied on the yield and quality of 'Hinohikari' rice. When the cultivation depth was less than 10 cm, the occurrence of white ground grains increased and the quality of the appearance of the rice was decreased. The occurrence of white immature grains was more likely with high temperatures after heading but was less likely when the leaf color was dark at the heading stage. For 'Hinohikari' rice at the early planting stage, heavy nitrogen manure application resulted in darkening of the leaf color at the heading stage and decreased the number of basal white particles. In addition, during years with higher temperature, the application of a late-season fertilizer enhanced the leaf color at the heading stage and decreased the number of basal white particles.
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