【摘要】 为明确超高茬麦田套稻的超高产机理,对徐稻3号10 500 kg/hm2产量典型田块定点,研究其产量形成及生物学特性。结果表明,徐稻3号在超高茬麦田套播种植方式下,群体干物质积累前期少,中后期尤其是抽穗至成熟期干物质积累量达到10 360.65 kg/hm2;稻麦共生21 d小麦让茬时叶面积指数(LAI)0.10,孕穗期最大叶面积指数(LAI)为7.71,总叶片16~17叶;小麦让茬至6月底白根率达100.0%,拔节期降为25.0%,孕穗前回升至36.9%;徐稻3号套播全生育期158 d;基本苗8.10×105,让茬后有15 d左右的缓苗期。分蘖启动日为麦收后15 d左右,有效分蘖终止于倒7叶期,苗蘖最高峰为1 hm26.06×106,成穗率58.9%,总颖花量1 hm24.75×108;平均株高96.2 cm。更多还原

【Abstract】 To find out the high yield mechanism of rice interplanted with high stubble wheat,yield formation and biological characteristics of Xudao 3 was studied.When interplanted with high stubble wheat,Xudao 3 accumulated little dry matter in early stage but much(10 360.65 kg/hm2) in late stage.Leaf area index(LAI) of Xudao 3 was 0.1 on day 21 of interplanting on which wheat was reaped.Leaf number at booting stage was 16 or 17,whith LAImax being 7.71.White root percentage was 100% from wheat reaping to late June but decreased to 25% at elongation and rose back to 36.9% at booting stage.Tillering initiated 15 d after wheat reaping,and ended at the formation of 7th leaf from top,with maximum tiller number of 4.04×105 in 1 hm2,total spikelet of 4.75×108 in 1 hm2,and percentage of earbearing tiller of 58.9%.更多还原