直播水稻适宜播期研究
直播水稻适宜播期研究
摘要以2个偏早熟粳稻品种盐粳311和盐粳56为材料, 进行直播稻种植播期试验研究。结果表明:播期对水稻生育性状、产量形成及产量结果均有较大的影响。在当地栽培条件下,2个品种的适宜播期均为6月5~ 20日, 安全齐穗的临界播期为6月25日。
关键词直播水稻; 适宜播期; 临界播期
DiscussiononOptimizedSowingDateofDirectSeedingRice
CHEN Hai-taoGE Hong-chun
(The Twelfth Branch of Yellow Sea Farm in Jiangsu Province,Xiangshui Jiangsu 224624)
AbstractIn this paper,Yanjing 311 and Yanjing 56 which were partial early maturing japonica rice varieties were studied on sowing date under direct sowing cultivation as the test materials. The results showed that sowing date had a greater impact on growing characteristics,yield formation and yield of rice. Under local conditions,optimized sowing date of the two varieties was between June 5 and June 20,and critical sowing date was June 25.
Key wordsdirect seeding rice;optimized sowing date;critical sowing date
直播水稻与移栽水稻相比, 具有2个明显的生长特点, 一是直播水稻分蘖节位低, 分蘖芽小, 茎蘖动态往往表现为高峰苗偏高, 成穗率降低; 二是播期明显偏迟, 生育期缩短, 个体生长量下降, 穗型偏小, 能否安全齐穗成为其敏感问题[1]。所以直播水稻在水稻生育性状方面, 应选择生育期偏早熟、穗型偏大早熟的中粳[2]。试验以黄海农场十二分场的2个主要偏早熟直播水稻品种为材料, 进行了直播方式适宜播期的研究, 以期为今后直播水稻品种的选育工作和栽培技术提供理论依据。
1材料与方法
1.1试验地概况
试验地点设在黄海农场农科所试验田内, 东经119°54.59′,北纬34°95′。
1.2试验材料