播种期对芝麻生育期及产量性状的影响

从4月30日到7月29日设立10个播种期,研究不同播种期对芝麻生育期及产量性状的影响。结果表明：播种期对芝麻生育期影响明显,呈先升后降,然后小幅上升的趋势;随着播种期推迟,芝麻株高、始蒴高度和单株产量表现为先升后降趋势,其中单株产量于5月21日播种达最大值;蒴节数、每蒴粒数和千粒重呈不断下降趋势;蒴果长和蒴果宽变化不明显;空稍尖长度变化的规律性不明显,于第6期（6月9日播种）和第7期（6月19日播种）达最大值;播种期之间的小区产量差异达显著或极显著水平。因此,播种期对芝麻生育期和产量性状影响明显,适宜播期为5月上旬到7月中旬,其中5月下旬播种产量最高。

Effects of Different Sowing Dates on Growth Duration and Yield Characteristics of Sesame

In order to provide scientific reference for application of sesame,a field experiment with ten sowing dates from April 30 to July 29 was conducted to study the effect of different sowing dates on growth duration and yield characteristics of sesame.The results indicated that the sowing dates had significant influence on sesame growth duration,which showed a increase-decreaseslight increase trend.The plant height（PH）,first capsule height（FCH） and yield per plant（YPP） of sesame showed increase-decrease trend,and YPP was highest in treatment of May 21.Capsule nodes per plant（CNP）,seeds per capsule（SPC） and thousand-seed weight（TSW） were decreased,while length and width of capsule changed unconspicuously.And so did the ineffective top part,only biggest on the 6th（sowed at June 9） and 7th（sowed at June 19） sowing time.Difference in yield among different treatments was significant at 0.01 or 0.05 level.Therefore,the sowing dates had significant influence on sesame growth duration and yield characteristics,and the appropriate sowing dates of sesame were from May 1st to July 20th,and the highest yield cloud been got in late May treatment.