摘要
选用6个早稻品种(组合),探讨直播栽培方式下的生育特性。结果表明,杂交稻产量为7 833～8 100 kg/hm2,差异不显著;常规稻嘉育948产量7 344 kg/hm2,杂交稻组合与嘉育948产量差异显著。杂交稻组合表现了不同的产量形成特性。产量水平相同的陆两优996和禾盛两优25,陆两优996穗大、粒重,而禾盛两优25穗多、粒轻。陆两优996和嘉育948的分蘖力相对较弱,成穗率较高。春光1号和株两优819分蘖力强,穗小;春光1号表现分蘖期较长,株两优819分蘖期短而集中。禾盛两优25生育前期发育快、干物质积累量较高。嘉育948、株两优30和春光1号前期发育慢、干物质积累量较低。不同品种直播栽培表现了不同的生育特性,因而直播栽培策略需因品种而异。在促进分蘖早发的同时严格控制过多分蘖、促进有效分蘖的干物质积累是高产的关键。
Six varieties（combinations） of early season rice were studied for growth characteristics as direct-seeded rice.The result showed that the grain yield of the hybrid rice combination was 7 833-8 100 kg/hm2 and within non-significant difference.The grain yield of Jiayu948 of general rice variety was 7 344 kg/hm2.The grain yields of hybrid rice combinations and Jiayu948 had significant difference（P0.05）.The characteristics of yield form were exhibited differently in the hybrid rice combinations.The yields of Luliangyou996 and Heshengliangyou25 were the same,the panicle of Luliangyou996 was bigger and its grain weight was bigger and the panicles of Heshengliangyou 25 were more and its grain weight was smaller.The tillering power of Luliangyou996 and Jiayu948 as weaker,and the percentage of effective panicles were larger.The tillering power of Chunguang1 and Zhuliangyou819 was strong,and their panicles were smaller.The tillering time of Chunguang1 was longer,and the tillering time of Zhuliangyou819 was shorter and concentrated.The growth was faster and dry matter accumulation was more for Heshengliangyou25 at the growth prophase.The growth was slower and dry matter accumulation was less in Jiayu948,Zhuliangyou30,Chunguang1 at the growth prophase.Different varieties had exhibited different growth characteristics as direct-seeded planting.Different cultivating strategies should be used for different varieties.The key to high yield is to control pletholic tillers and enhance dry matter accumulation of effective tillers while enhancing early tillering.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2011年第3期399-404,共6页
Acta Agriculturae Universitatis Jiangxiensis
基金
江西省科技厅"江西省重大战略产品科技创新项目"(2008AB00800)
科技支撑计划项目(2009BNA03700)
关键词
早稻
不同品种
直播
生育特性
early rice
different variety
direct-seeded
growth characteristic
