延迟播期对西藏赤瓟产量构成的影响

Effects of delayed sowing-date on yield components of Thladiantha setispina

目的明确雌雄异株植物西藏赤瓟Thladiantha setispina在环境胁迫下的响应差异以及环境因素对西藏赤瓟结实和产量的影响。方法通过对比研究不同播期处理对田间西藏赤瓟雌株率、果实性状以及种子产量的影响。结果不同播期对西藏赤瓟雌雄株分化影响显著,适当延后播期可以显著地提高西藏赤瓟的雌株比例(P<0.01);播期对西藏赤瓟的结实性能的影响程度比较有限,不同播期处理间西藏赤瓟果实单果平均鲜质量、干质量及干物质量差异并不显著(P>0.05),但播期对西藏赤瓟产量构成相关指标却有着直接影响,处理间产量差异达到极显著水平(P<0.01)。结论适当延后播期,有利于提高西藏赤瓟种子产量。

Objective In order to discuss the influence difference of environmental stress on dioecious plants and the response of environmental factors influence on the fruiting and yield of Thladiantha setispina. Methods The effects of the different sowing-dates on the female plant rate, fruit character, and seed yield of T. setispina were investigated by the comparative ways. Results Different sowing-dates on differentiation of male and female plants had a significant impact. The appropriate delay of sowing-date could significantly improve the proportion of female T. setispina （P 〈 0.01）; Sowing-date limited the impacted fruit character ofT. setispina. By the treatment of different sowing-dates, the differences of average real weight of fresh fruit quality, dry quality, and dry matter content were not significant （p 〉 0.05）, but the sowing-date on yield components of T. setispina had a direct impact on related indicators, yield differences during the treatments reached a very significant level （P 〈 0.01）. Conclusion The appropriate delaying of sowing-date could help to improve the seed production of T. setispina.