Effects of soilless substrates on seedling quality and the growth of transplanted super japonica rice

doi:10.1016/S2095-3119(16)61588-5

摘要/Abstract

Abstract: This study was conducted to investigate the effects of soilless substrates of hydroponically grown long-mat seedlings (HLMS) on seedling quality and field growth characteristics of transplanted super japonica rice. A widely grown conventional super japonica rice cultivar (Wuyunjing 23) was selected as the test material. The effect of HLMS on seedling quality, mechanical transplantation quality, field growth characteristics, yield, and benefit-cost ratio were compared with seedlings grown in organic substrates and traditional nutritive soil, which was selected as the control. Root number, root twisting power and root activity of seedlings cultivated by HLMS were decreased compared to that of the organic substrates and control. However, seedling root length as well as aboveground growth were increased compared to the organic substrates and control seedlings. In the HLMS, the content of gibberellin acid (GA₃) decreased while abscisic acid (ABA) content increased compared to that of the organic substrates and control seedlings. During the early stages after transplanting, the re-greening of HLMS was delayed compared to that of the organic substrates and control seedlings. Nevertheless, there were no significant differences in tiller dynamics and crop yield among the HLMS, organic substrates and control treatments. The effects of HLMS on seedling production were similar to those of the organic substrates and traditional nutritive soil in the present study, suggesting that HLMS have the potential to replace traditional nutritive soil in seedling production without decreasing crop yield. Finally, it is important to reduce organic substrates and topsoil dependence during rice seedling production and worthwhile to consider HLMS popularization and its application on a larger scale.

Key words: super hybrid rice (Oryza sativa L.), mechanical transplantation, seedling quality, yield, seedling raised method

. [J]. Journal of Integrative Agriculture, 2017, 16(05): 1053-1063.

LEI Wu-sheng1, 2, DING Yan-feng1, LI Gang-hua1, TANG She1, WANG Shao-hua1. Effects of soilless substrates on seedling quality and the growth of transplanted super japonica rice[J]. Journal of Integrative Agriculture, 2017, 16(05): 1053-1063.

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