播期对不同粒型花生品种发育进度的影响及与气象生态因子的关系

为了研究播期对不同粒型花生品种发育进度的影响及与气象生态因子的关系，采用两因素随机区组试验设计，选用小籽、中籽、中大籽和大籽花生品种4个，设计5个春夏播期（3月下旬至5月初，每播期间隔10天）进行对比试验。结果表明，4种粒型花生品种生育前期和中期的发育进度均受到播期极显著或显著的影响，生育后期气象条件相似，播期间生育日数相差甚少。播种至出苗阶段发育天数的决定性气象生态因子为总积温，其次是气温指标，而降水量、日照时数影响不显著。出苗至开花阶段发育天数的决定性气象生态因子为气温指标和总积温，其次是降水量和日照时数。全生育期天数的决定性气象生态因子为气温指标、总积温和日照时数，而降水量影响小。

Influence of Sowing Dates on Developmental Progress of Different Seed-size Peanut Cultivars and the Relationship with Meteorological Eco-factors

In order to study the influence of sowing date to different seed-type seeds of peanut cuhivars＇ development rate and the relationship with meteorological eco-factors, this study used two randomized factor to design the experiment. The comparison was tested by four varieties of peanuts including small seeds, medium seeds, medium-large seeds and large seeds and five different sowing times. The results showed that： four varieties of peanuts＇ early and mid-season development progress were extremely significantly or significantly influenced by sowing date, weather conditions were similar in the late development stage, so the development days during this time was similar between four varieties of peanuts. The decisive meteorological ecological factor to the days of sowing to emergence was total accumulated the temperature, the second factor was the temperature index, While the influences of precipitation and sunshine time was not significant. The days of emergence to flowering stage is decisived by the temperature index and total accumulated temperature, followed by precipitation and sunshine hours. The decisive meteorological ecological factors to the days of whole development stages were temperature index, total accumulated temperature and sunshine hours,the influence of precipitation effect was not significant.