辽首-花生15适宜播种期及热量指标研究

通过2004-2008年5a试验,研究并分析了辽阳地区花生新品种辽首-花生15的适宜播种期及各生育阶段的热量指标,以期为该品种推广及适时栽培管理提供气候依据。结果表明:当辽阳地区日平均气温稳定通过12℃时适宜辽首-花生15播种,播种适宜期为4月15-25日,最佳播种期为4月20-25日。辽首-花生15品种全生育期154d左右,需≥12℃活动积温3 200℃.d以上。其中,播种-出苗阶段积温指标在250℃.d以上,出苗-初花阶段在550℃.d以上,初花-末花阶段在630℃.d以上,末花-成熟阶段在1 650℃.d以上。辽阳地区热量资源较为丰富,适宜种植辽首-花生15。

Studies on the Suitable Seeding Time and Heat Index of Liaoshou-Peanut 15

In order to provide the climate information for release and cultivation of new peanut varieties,the best seeding time and heat index of Liaoshou-Peanut 15 were studied by 5-year experiments during 2004-2008.Results showed that it was suitable for seeding of Liaoshou-Peanut 15 in Liaoyang area when mean daily temperature increasing steadily to above 12 ℃.The suitable seeding period was April 15-20,while the best seeding period was April 20-25.The growth period of Liaoshou-Peanut 15 was about 154 d,and its accumulated temperature was beyond3 200 ℃ with a daily temperature higher than 12 ℃.The indexes of accumulated temperature during various developmental stages differ greatly,including 250 ℃ from seeding to emergence,550 ℃ from emergence to primary blossom,630 ℃ from primary blossom to late blossom,and 1 650 ℃ from late blossom to maturation.Liaoyang is rich in heat energy,which has the advantage of cultivation of Liaoshou-Peanut 15.