论文部分内容阅读
1990～1992年对多花黑麦草(LoLium multiflorum Lam)俄勒岗品种的3个不同生长条件的群体进行了开花后当天至花后30天内的籽粒灌浆,脱落现象的研究,结果表明:3个群体的千粒重和脱落率与花后天数的关系均符合 Logistic 理论曲线.单穗籽粒干物重最大值出现在花后18～24天.花后15～18天的种子已具有较高发芽率(64.3%～91.1%),与以后各期收获的种子间无显著差异,但以花后18～24天的种子发芽苗质较好.据此.上海地区多花黑麦草种子的最佳收获期为花后18天～24天.
From 1990 to 1992, the population filling and shedding of three populations of Oregon cultivated in LoLium multiflorum Lam from the day after flowering to 30 days after flowering were studied. The results showed that three The relationship between the 1000-grain weight and the rate of exfoliation and the days after anthesis accorded with Logistic curve.The maximum value of dry weight of single ear spike appeared in 18-24 days after anthesis.The seed germinated 15-18 days after flowering had higher germination rate (64.3 % ~ 91.1%). There was no significant difference between the seeds harvested at later stages, but the seeds germinated better after 18 ~ 24 days after flowering.According to this, the best harvesting period for the seeds of ryegrass in Shanghai was 18 days after anthesis to 24 days.