Field Efficacy Trial and Optimum Control Period of Rice False Smut(Ustilaginoidea virens) in Single Cropping Middle-late Rice

[Objective]The paper was to study optimum chemical agents and control periods against rice false smut( Ustilaginoidea virens) in single cropping middle-late rice. [Method]Taking chemical agents( triadimefon,armure,Jinggangmycin) as main treatments and spraying periods( within 7 d before initial heading stage,within 7 d before initial heading stage + initial heading stage,initial heading stage) as assisted treatments,the field efficacy trial and optimum control period of U. virens in single cropping middle-late rice were studied using Huanghuazhan and Jinnongsimiao as experimental materials in 2013. [Result] Three chemical agents,triadimefon,armure,Jinggangmycin,extremely reduced diseased panicle rate and disease index of U. virens,but there was no significant difference among three chemical agents. Spraying period did not have significant impact on diseased panicle rate and disease index of U. virens,whereas spraying within7 d before initial heading stage and during initial heading stage had relatively good control effect. Yield increased significantly after application of three chemical agents,and armure led to greater increase. The reason for yield increase was that seed setting rate was significantly increased,and the number of filled grains per panicle was significantly increased. Although spraying period influenced yield,the difference was not significant. [Conclusion] Triadimefon,armure and Jinggangmycin had good control effects against U. virens in single cropping middle-late rice,of which armure had better control effects. Spraying chemical agents increased seed setting rate,and further increased the number of filled grains per panicle and yield. Spraying within 7 d before initial heading stage and during initial heading stage had relatively better control effect against U. virens.

Chemical Weeding in Dry Direct Seeding Fields of Single Cropping Middlelate Rice

Chemical weeding in dry direct seeding fields of single cropping middle-late rice was studied in Huida vegetable farm of Huizhou City in 2012. The main treatment was herbicide（ pretilachlor ＋ bensulfuron-methyl,Yangguo and butachlor）,and the sub-treatment was application method（ soil treatments,seedling treatment and integrated treatment）. The results showed that 80 g pretilachlor ＋ bensulfuron-methyl（ 36% pretilachlor ＋ 4% bensulfuron-methyl） diluted with 50 kg water could be sprayed or 200 g Yangguo（ 23. 9% butachlor ＋ 1. 1% bensulfuron-methyl） mixed with 15 kg sandy soil could be broadcasted per 667 m2 on the sowing day or the second day under moist condition of soil,which could effectively control weeds in dry direct seeding fields of single cropping middle-late rice.

国家水稻区试中稻迟熟高产组试验总结

2004-2005年我们对国家中稻迟熟高产组水稻进行了大田区域试验,同时对它们的区域试验结果进行了方差分析,结果有两优航1号、协优9019、天香优8号、T优551、Ⅱ优416、红优166六个品种比对照汕优63增产。

优质高产晚粳新品种鄂晚14的选育及栽培

介绍了双季中熟晚粳鄂晚14的选育过程,阐述了其特征特性及栽培技术。该品种一般公顷产量7000kg左右,比鄂宜105增产4.11%～16.00%,米质综合评价达到国标一级优质米标准,米饭柔软,食味佳,适口性好。栽培上应适时播种移栽,施足底肥,合理密植。

2010年国家水稻区试新罗点晚籼新品种试验初报

通过对2010年国家水稻华南稻区新罗点晚籼中迟熟新品种区域试验,考查各品种产量、全生育期、有效穗、穗粒数、结实率、千粒重等主要农艺性状表现,筛选适合龙岩市新罗区种植的优良晚稻品种。

龙岩市新罗区2012年中稻新品种比较试验初报

选择10个中稻新品种,采用随机排列的方法进行品比试验,对各品种的农艺性状、生育期、产量进行研究。试验结果表明:宜优115、宜优673、内优航148三个品种穗大粒多,丰产性好,生育期适宜,抗性较好,适应性强,适宜龙岩市新罗区作中稻主推品种种植。