Effects of soaking time and emergence temperature on seedling growth of rice seedlings

doi:10.16178/j.issn.0528-9017.20250161

Abstract

Abstract:

In order to determine the effects of seed soaking time and seedling emergence temperature on the growth of rice seedlings，Yongyou 1540 and Xiushui 134 were used as test materials，and three seed soaking time were set for each of the two varieties：Yongyou 1540（T1，soaking 24 h；T2，soaking 48 h；T3，soaking 48 h + pregermination 24 h），Xiushui 134（T4，soaking 48 h；T5，soaking 72 h；T6，soaking 72 h + pregermination 24 h），and three seedling emergence temperatures（24 ℃，28 ℃，32 ℃）. The effects of different treatments on coleoptile length，embryo thickness，seedling height，leaf age，stem base width，root length，above-ground dry matter accumulation were systematically compared. The results showed that appropriately increasing the emergence temperature and extending the soaking time of seeds were beneficial to improving the emergence rate and the quality of seedlings. However，the emergence temperature and soaking time had a relatively small impact on the coleoptile length，embryo thickness，and the fullness of the seedlings. The results of this study provides theoretical support for the selection of seed soaking time and emergence temperature of rice seeds.

Key words: seedling tray overlapping, rice, soaking, emergence temperature, seedling quality

CLC Number:

S511

LAN Tianming, LI Hui, CHEN Huizhe, ZHANG Feijie, ZHU Defeng, WANG Yaliang. Effects of soaking time and emergence temperature on seedling growth of rice seedlings[J]. Journal of Zhejiang Agricultural Sciences, 2026, 67(2): 314-320.

Figures/Tables 6

Fig.1 Emergence rate under different seed soaking time and emergence temperatures

Fig.2 Celeoptile length of seeds under different seed soaking time and emergence temperatures

Fig.3 Embryo thickness under different seed soaking time and emergence temperatures

Table 1 Seedling quality under different seed soaking time and emergence temperatures

品种	处理	苗高/cm			叶龄			茎基宽/mm			根长/cm
品种	处理	24 ℃	28 ℃	32 ℃	24 ℃	28 ℃	32 ℃	24 ℃	28 ℃	32 ℃	24 ℃	28 ℃	32 ℃
甬优1540	T1	18.98	19.34	20.40	2.71	2.74	2.82	1.36	1.56	1.59	7.17	7.56	7.68
	T2	19.39	20.88	21.68	2.93	2.98	3.07	1.67	1.76	1.92	7.62	7.92	8.64
	T3	20.59	21.75	22.53	2.99	3.02	3.17	1.81	1.85	1.95	8.65	9.55	10.08
秀水134	T4	18.36	18.81	19.32	2.91	2.93	3.01	1.51	1.59	1.67	4.79	5.09	5.35
	T5	18.63	20.06	21.58	3.03	3.05	3.13	1.69	1.71	1.84	5.65	5.97	6.20
	T6	20.56	21.58	22.51	3.11	3.25	3.25	1.77	1.96	1.97	6.04	6.27	6.69

Fig. 4 Above-ground dry weight of seedlings under different seed soaking time and emergence temperatures

Fig. 5 Seedling fullness under different seed soaking time and emergence temperatures

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