<FONT face="Verdana">The Optimal Moisture Content and Survival Characteristics of Rice Seeds Stored at Six Climatic Zones Under Room Temperature <BR></FONT>

HU Qun-wen,LU Xin-xiong１,XIN Ping-ping１,CHEN Xiao-ling１,ZHANG Zhi-e,XIN Xia１,LIU Xu１

doi:0.3969/j.issn.1001-7216.2009.06.10

2009 , Vol. 23 >Issue 6: 621 - 627

DOI: https://doi.org/0.3969/j.issn.1001-7216.2009.06.10

研究报告

The Optimal Moisture Content and Survival Characteristics of Rice Seeds Stored at Six Climatic Zones Under Room Temperature

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¹Key Laboratory of Crop Germplasm Resources and Biotechnology, Ministry of Agriculture / Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China; ²Bureau of Planting Management of Anqing City, Anhui Province, Anqing 246001, China; *Corresponding author, E-mail: xxlu@caas.net.cn

Received date: 1900-01-01

Revised date: 1900-01-01

Online published: 2009-11-10

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Abstract

Rice seeds of two varieties, Guichao 2 (indica) and Sachiminori (japonica) with different levels of moisture content were stored under room temperature at six sites with different types of climatic zones including Sanya, Nanchang, Beijing, Xining, Urumchi and Harbin, respectively. The optimal moisture contents and the survival characteristics were studied through a successive 11year monitoring on viability and vigor of rice seeds. The viability and vigor of dried rice seeds with optimal moisture content were not significantly declined. However, it proved otherwise when the seed moisture content declined to below 30%. The optimal moisture content of seeds stored in Sanya and Nanchang at room temperature was obtained. The optimal moisture content of 65% to 50% was widely adaptable to the six climatic zones. The phase of rapid decline in viability of seeds with optimal moisture content was delayed compared with other moisture contents. The upper limit and the range of optimal moisture content were negatively correlated with mean annual temperature and accumulated temperature (≥ 0℃) at significant or highly significant levels, and the lower limit was positively correlated with them at significant or highly significant levels. Although with the same mean annual temperature in Xining and Urumchi, the seed storage results were different. This implied that the accumulated temperature (≥ 0℃) and fluctuation in temperature were probably the major reasons for the difference.

Key words： rice; seed; storage under room temperature; optimal moisture content; seed viability; germination character

Cite this article

HU Qun-wen,LU Xin-xiong１,XIN Ping-ping１,CHEN Xiao-ling１,ZHANG Zhi-e,XIN Xia１,LIU Xu１ . The Optimal Moisture Content and Survival Characteristics of Rice Seeds Stored at Six Climatic Zones Under Room Temperature
[J]. Chinese Journal OF Rice Science, 2009 , 23(6) : 621 -627 . DOI: 0.3969/j.issn.1001-7216.2009.06.10

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