Difference of light and temperature resources in tray seedling and its effect on seedling quality in rice

doi:10.3969/j.issn.1004-1524.2020.02.02

›› 2020, Vol. 32 ›› Issue (2): 191-199.DOI: 10.3969/j.issn.1004-1524.2020.02.02

• Crop Science • Previous Articles Next Articles

Difference of light and temperature resources in tray seedling and its effect on seedling quality in rice

SHAO Wenqi, ZHONG Ping, DONG Yubing, SUN Chunmei, JI Li, ZHUANG Chun, CHEN Chuan, ZHANG Ankang^*

Huaiyin Institute of Agricultural Sciences of Xuhuai Region in Jiangsu, Huai’an 223301

Received:2019-11-04 Online:2020-02-25 Published:2020-03-13

Abstract

Abstract: Tray seedling is a kind of open-air seedling raising method. Under different weather conditions, the light intensity and temperature changes of the upper, middle and lower seedling platforms were measured and analyzed, and the differences of temperature and light resources among different seedling platforms were found out. Nanjing 9108 and indica rice Y Liangyou 900 were used as materials to compare the quality differences of seedlings raised by different seedling platforms. The results showed that light intensity of each seedling platform increased first and then decreased, reaching the peak value in the afternoon, and the difference between different seedling platforms was significant at P<0.05. In sunny days, there were significant differences in tray water temperature, root soil temperature and seedling temperature among the three seedling platforms (P<0.05). In the same seedling platform, tray water temperature>root soil temperature>seedling temperature. In cloudy days, there was no significant difference between the middle platform and the lower platform (P>0.05). In Nanjing 9108, the order of seedling forming rate was as follow: middle platform>upper platform>lower platform. Compared with middle platform and lower platform, the height of upper platform seedlings decreased by 19.2% and 19.6%, respectively, and the leaf age increased by 17.6% and 29.0%, the stem base width increased by 14.8% and 24.0%. Leaf SPAD value, dry weight of upper part of ground, number of roots and rooting ability also increased significantly (P<0.05), the K value decreased, and the dry matter accumulation increased. Y Liangyou 900 showed similarly trend as Nanjing 9108. Therefore, temperature and light resources in the upper platform were the best, and the seedlings were the most robust. Quality of seedlings in the middle and lower platform were obviously weakened. In order to reduce the differences of light and temperature resources and improve the consistency of seedling quality, the distance between scaffolds and seedling platforms could be increased appropriately.

Key words: rice, mechanical transplanting, stereo, tray seedling measure, resources of light and temperature, seedling quality

CLC Number:

S625.5
S511

SHAO Wenqi, ZHONG Ping, DONG Yubing, SUN Chunmei, JI Li, ZHUANG Chun, CHEN Chuan, ZHANG Ankang. Difference of light and temperature resources in tray seedling and its effect on seedling quality in rice[J]. , 2020, 32(2): 191-199.

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Difference of light and temperature resources in tray seedling and its effect on seedling quality in rice

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