10个水稻品种和5个恢复系材料的抗旱特性
Guizhou Agricultural Sciences(2013)
Abstract
为了解不同水稻品种的抗旱性,选用10个水稻品种和5个恢复系材料为试验材料,采用人工控水盆栽和大田抗旱栽培试验方法,测定其幼穗分化期、开花期、灌浆期3个水分临界期的土壤含水量、胁迫敏感指数和抗旱系数.结果表明:水稻幼穗分化期是水稻品种和恢复系需水敏感期,在这个时期抗旱能力最弱,产量受影响最大;再次是开花期和灌浆期.在选用的水稻品种和恢复系中,综合各项测定指标以富优978、中优608、锦优707和恢复系材料1100早的抗旱能力较强,其幼穗分化期抗旱系数分别为0.551、0.660、0.615和0.686.
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Key words
water stress,restorer line,rice variety,drought resistance coefficient
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