暗直播栽培对水稻穗部性状及产量的影响  

Effect of Dark-Direct Seeding on Characters of Rice Panicle and Yield

作　　者：沈建凯[1,2] 郑华斌[2,3,4] 尹明[1] 谢振宇[1] 贺治洲[1] 黄璜[2,3,4] 

机构地区：[1]中国热带农业科学院热带作物品种资源研究所,海南儋州571737 [2]湖南农业大学农学院,湖南长沙410128 [3]农业部华中地区作物栽培科学观测实验站,湖南长沙410128 [4]农业部多熟制作物栽培与耕作重点开放实验室,湖南长沙410128

出　　处：《作物杂志》2014年第4期84-87,共4页Crops

基　　金：海南省自然科学基金项目(313071);中国热带农业科学院品资所基本科研业务费专项(1630032014031)

摘　　要：采用大田小区对比试验方法,探讨了暗直播栽培方式对水稻产量及穗部性状的影响。初步试验结果表明,与普通水稻直播(CK)比较,暗直播水稻实收产量增加9.89%;稻穗一次枝梗实粒数、二次枝梗数、着粒数、实粒数分别增加3.97%、19.65%、18.51%和18.06%;主轴实粒数和结实率下降7.55%和4.99%;全穗的总枝梗数、总粒数、实粒数和单穗重增加10.64%、9.37%、8.50%和8.18%。数据分析结果表明,暗直播稻穗二次枝梗的枝梗数、总粒数和实粒数的增加,是水稻产量增加的主要原因。说明暗直播栽培方式可以扩大水稻库容量,实现水稻增产,在生产实践中具有良好的应用价值。To explore the effect of dark-direct seeding on characters of rice panicle and yield, a field plot experiment was carried out at Beisheng, Liuyang city in Hunan province. The results of preliminary study showed that compared with control, in the dark-direct seeding plot, the harvested rice grain yield was significantly increased by 9.89%. The total amount of primary branches of rice panicle, total amount of secondary branches and its grains, filled grains were increased by 3.97%, 19.65%, 18.51%, 18.06% ,respectively;But the amount of filled grains and seed setting ratio of cob were decreased by 7.55% and 4.99%. In the dark-direct seeding plot, the total amount of branches of rice panicle, total grains and single panicle weight were increased by 10.64%, 9.37%, 8.50% ,8.18%, respectively. Based on these results, it was indicated that the increase of amount of secondary branches and its grains, seed setting was the main reason of rice yield increase in dark-direct seeding. Hence, it was suggested that dark-direct seeding could enhance rice yield through increasing rice population sink potential, and this technique had a good application value in rice cultivation practice.

关 键 词：水稻 暗直播 穗部性状 库容 枝 梗数 

分 类 号：S511[农业科学—作物学]