摘要
为明确大田生产条件下晚麦茬机直播水稻分蘖特性,以‘武运粳24'为材料,研究不同播种量机直播水稻的分蘖发生率、成穗特点以及对产量构成的关系。结果表明:晚麦茬机械直播水稻第1叶位的分蘖发生率和成穗率都较低,在成穗数的茎蘖组成中占比较小;2—4叶位为分蘖优势叶位,分蘖发生率及成穗率都较高,是成穗数的重要组成部分;水稻分蘖对产量的贡献率与播种密度成反比,4个处理主茎和分蘖对产量的平均贡献率分别为59.44%和40.56%;在所有分蘖成穗叶位中,第2、3、4叶位对产量的贡献率最大,平均贡献率分别为14.38%、12.21%和9.33%,且随着密度的提高,第2、3、4叶位对产量的合计贡献率随之降低;同时,第2、3、4叶位分蘖穗部性状好,更容易创造高产。
In order to explore the tillering characteristics of mechanical direct-seeding rice after latter wheat in field production,with ‘Wuyunjing 24’as experimental materials,the tillers rate,panicle rate and relationship between yield components were investigated by setting special density tests.The results showed that tillers rate and panicle rate of the 1st node were relatively lower,and has smaller proportion in the composition of a tiller spike in share.The main tillering zone was located between the 2nd to 4th node and tillers rate and panicle rate were relatively higher,which was an important part of a spike.The contribution rate of tillering on yield was in-versely proportional to the planting density,the average contribution rate of steam and tillering on yield under 4 treatments was 59.44% and 40.56%,respectively.In all tillers leaf bits,the maximum contribution rate was from the 2nd to 4th node tillers,the average contribution rate were 14.38%,12.21% and 9.33%,respectively.With the increase of density,the 2nd to 4th node tillers for a total contribution of clover-bit output decreased;Mean-while,the 2nd to 4th node tillers had better panicle traits,which were easier to create higher yield.
出处
《上海农业学报》
CSCD
2015年第2期117-121,共5页
Acta Agriculturae Shanghai
关键词
粳稻
麦茬稻
直播稻
播种密度
分蘖
产量
Keng rice
Rice following wheat
Direct-seed rice
Seeding density
Tillering
Yield
