【摘要】 通过对49个供试小麦品系穗部性状的考察分析,以及对长沙地区2009年春季气候变化的深入研究,从小麦生长发育的特性出发,探讨春季低温阴雨的气候条件对小麦产量性状的影响,结果表明,小麦穗分化中后期(拔节至孕穗)是小麦生长发育的关键时期,而这一时期的异常气候,使小麦受到严重湿害和低温冷害,表现为小花退化增多,可孕小花数和实粒数减少,结实率大幅降低,以致造成重大产量损失。更多还原

【Abstract】 Forty nine winter wheat lines were used to study the effects of low temperature and frequent rain during spring on growth and developmental,yield and ear characters of wheat in 2009 in Changsha.Results showed that the stage from jointing to booting was the key period for wheat growth and development.Low temperature and frequent rain during this stage induced to increase of deteriorated florets and decrease of filled grain,seed setting rate and yield.更多还原