播期和密度对麦茬中粳稻皖稻68生育期和产量形成的影响  

The Effect of Sowing Date and Density of Rice Stubble in WanDao 68 Reproductive Period and Yield Formation

作　　者：黄雅丽[1] 陈刚[1] 陈楠[1] 黄义德[1] 

机构地区：[1]安徽农业大学,合肥230036

出　　处：《中国农学通报》2009年第15期95-99,共5页Chinese Agricultural Science Bulletin

基　　金：国家粮食丰产工程"江淮中部(安徽)稻麦丰产技术集成研究与示范"(2006BAD02A06)

摘　　要：为了给安徽省沿淮地区麦茬稻机插和直播等轻简栽培提供技术支撑,采用田间试验的方法[1],研究不同播期和移栽密度条件下皖稻68的生育期和产量形成的变化情况。结果表明,皖稻68生育期天数随播期的推迟而递减,但推迟到6月14日播种仍可正常成熟;移栽密度对生育期无明显影响。不同播期同期栽插的,随播期推迟产量下降,但因秧龄长短的原因,穗数随播期推迟而增加,每穗粒数、结实率和千粒重递减;迟播的增加移栽密度有利于增加穗数而增产。该试验条件下皖稻68作为沿淮麦茬稻栽培,育秧移栽的以5月5日和15日播种,移栽密度为30.0万株/hm2和40.0万株/hm2产量最高,机插秧以5月25日左右播种为宜,直播稻以6月4—14日为播种适期。Areas along the Huai River in Anhui Province-using field test method-in order to give rice stubble＇ s light-simple Cultivation to provide technical support such as machine planting and live, and reseach the conditions of the different sowing date and transplanting density in the WanDao 68 growing period and yield changes. The results show that the growth period of WanDao 68 is reduced with the delayed sowing time, but deferred to the June 14 seeding still may be normal ripe; transplanting density on the growth period had no significant effect. Different sowing dates of planting in the same period, production is declined with the sowing date postponed, but the reasons for the length of seedling age, spike is increased with the sowing date postponed, each kernel number, seed setting rate and a-rain weight is decreased; With the increased spike, Increasing transplanting density of late sowing can increase the number of output. Under the rice stubble cultivation- the period of the highest yield is transplanting experimental conditions-WanDao 68 as seedlings is the May 5 and 15 day planting, transplanting density of 300 000/hm^2 and 400 000/hm^2, Machine-planting＇ s aporooriate olanting date is May 25, direct seeding rice is 4-14 June period for the planting appropriate.

关 键 词：播期 移栽密度 生育期 产量 

分 类 号：S3-33[农业科学—农艺学]