江苏地区两优培九高产制种的安全期分析  

Analysis on Safe Period for High Yield Seed Production of Liangyoupeijiu in Jiangsu Province

作　　者：邢开瑜[1] 景元书[1] 胡凝[1] 

机构地区：[1]南京信息工程大学应用气象学院,南京210044

出　　处：《中国农业气象》2011年第2期255-261,共7页Chinese Journal of Agrometeorology

基　　金：国家科技支撑计划项目"近百年来我国极端天气气候事件变化特征及其影响"(2007BAC29B02)

摘　　要：两优培九是两系杂交稻品种,其制种对气象条件有严格的要求。育性敏感期的低温会导致母本花粉的育性恢复,从而影响制种纯度;而抽穗扬花期的高温不利于水稻受精结实,影响制种产量。本文选择江苏省11个代表性站点的历史资料,通过分析各站点≤24℃的低温风险概率和≥30℃的高温风险概率,确定两优培九制种的育性转换安全期和最佳播种期。结果表明,江苏省南部地区适宜的育性转换安全期从8月第2候-8月第6候,最佳播种期从6月第2候-6月第4候;江苏中部和北部地区育性转换安全期从7月第4候-8月第2、3候,最佳播种期从5月第4候-6月第1候。两优培九适合在江苏地区制种,并且在江苏中部地区最佳。Liangyoupeijiu,two-line hybrid rice,has strict requirement for the meteorological conditions in the seed production.The fertility restoration of the female pollen,result from low temperature during the period of fertility conversion would affect seed purity.The yield of seed would decrease for the high temperature during the period of seed setting.The optimum period of sowing date for Liangyoupeijiu seed production from the safe period of fertility conversion and seed setting was determined,through analyzing the probability ratio that temperature lower than 24℃ and higher than 30℃,based on the data of 11 representative meteorological stations in Jiangsu.The results showed that the safe period of fertility conversion was from the second five days of August to the sixth five days of August and the optimum sowing date was from the second five days of June to the fourth five days of June in the south Jiangsu,the safe period of fertility conversion was from the fourth five days of July to the second the third five days of August and the optimum sowing date was from the fourth five days of May to the first five days of June in central and north Jiangsu.In sum,central Jiangsu was the better region to Liangyoupeijiu seed production.

关 键 词：两优培九 培矮64S 温度 育性转换安全期 抽穗扬花安全期 

分 类 号：S511[农业科学—作物学]