不同播种期对秋大棚番茄产量影响

秋大棚保护地栽培条件下,播种期分别为6月10日、6月20日、6月30日、7月10日,比较4个不同播种期番茄生育期及生长势的变化,分析研究不同播种期对番茄产量的影响,从而确定北京市通州区秋季大棚番茄最佳播种期、定植期。试验结果表明,1)播种期推迟,株高、茎粗、叶片数、果穗数呈减小趋势。2)秋大棚番茄定植后约20d开始进入始花期,始花期随着播种期的延迟,呈错后趋势,但时间相差不多;正常情况开花后约40d开始进入始收期,采收期可约达40d。3)6月30日和7月10日播种,番茄易发生晚疫病,7月10日播种晚疫病发生严重。4)播种期6月10日和6月20日,番茄产量效益较高,667m2产量约达到2559.1kg,播种期6月30日和7月10日,番茄产量效益较低,667m2产量约达到1455.2kg。5)6月20日是秋茬大棚番茄最佳播种期。

Influence of Different Date of Sowing on Yield of Autumn Greenhouse Tomato

Tomato of autumn greenhouse is under the conditions of conservation land,it's Date of sowing are on June 10、 June 20、 June 30 and July 10.In this trial,the growth duration and growth vigour of tomato have been compared to each other in four different date of sowing so as to analysis influence of different date sowing on yield to determine the best date of sowing、field planting of autumn greenhouse tomato in Tongzhou,Beijing.The results show that the first,with the delayed date of sowing,plant height、 steam diameter、 leaves number and fruit cluster number is decreasing trend.The second,it is after field planting of autumn greenhouse tomato about 20 d into the beginning of flowering,with the delayed date of sowing,the beginning of flowering is back delay trend,however,the time is similar;Normally It has begun to enter the collection period about 40 d after flowering,harvest time can be about 40 d.The third,if the date of sowing is on June 10 and July 10,tomato susceptibal to late blight of tomato and the incidence date of sowing of the most serious is on July 10.The fourth,if date of sowing is on June 10 and 20,production of tomato is higher up to 2 559.1 kg per 667 m2,if date of sowing is on June 30 and July 10,production of tomato is lower to 1 455.2 kg per 667 m2.The fifth,the best date of sowing of autumn greenhouse tomato is on June 20.