作物研究2016，Vol.30Issue(4)：370-375,6.DOI:10.16848/j.cnki.issn.1001-5280.2016.04.06
脱水剂对杂交水稻种子田间干燥效果的研究
Study on the Effect of Dehydrating Agent on Hybrid Rice Seeds in Field
摘要
Abstract
In order to explore the rapid drying technology of hybrid rice seeds in the field,two dehydrating agents (A and B)with 4 concentrations (750、1500、2250、3000 mL/hm2 )were selected and sprayed in the mature stage of the hybrid rice combinations of‘H638S ×R534’. Hybrid seed moisture content,seed grain weight,germination potential,germination rate,vitality,and proline content were determined after harvest. The results showed that:(1 )dehydration agents A and B decreased the water content of hybrid rice seed in the field rapidly. If there are five consecutive fine weather days after spraying and as the agent concentration increased,the seed moisture content decreased more rapidly. At same concentra-tion,the seed moisture content declined rapidly in the first three days after spraying and followed slow decline in the next two days. The average dehydration rate was 1. 5%-1. 7%/d,the seed moisture content decreased by 7. 0-8. 5 percentage points within 5 d. (2)In the tested concentration range,dehydration agents did not affect seed weight significantly of the seeds harvested timely;As the concentration increased,seed germination potential,germination rate and vigor showed a de-cline trend;at the same concentration and with the increased spraying days,the seed germination potential,germination rate and vigor also declined. (3)On the condition of 18%seed moisture content in field,according to the effect of the dehydra-ting agent on seed germination potential,germination rate,vigor and proline content,the suitable concentration of the two dehydrating agents are with 750-1500 mL/hm2;the suitable harvest time is 4-5 days after spraying. (4)In the case of con-tinuous rain condition after spraying,if the harvest delayed to 8-9 days,the seed germination potential,germination rate and vigor were significantly lower than that harvested at 5 days after spraying. Harvest timely should take in mind.关键词
杂交水稻/制种/脱水剂/种子水分/种子活力Key words
hybrid rice/seed production/dehydrating agent/seed moisture/seed vigor分类
农业科技引用本文复制引用
刘钊,刘爱民,张海清,陈勇,杨永标..脱水剂对杂交水稻种子田间干燥效果的研究[J].作物研究,2016,30(4):370-375,6.基金项目
国家科技支撑计划项目（2014BAD06B07）；湖南省教育厅研究生创新实验项目（CX2015B256）。基金项目国家科技支撑计划项目（2014BAD06B07）；湖南省教育厅研究生创新实验项目（CX2015B256）。 （）
