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《安徽水稻与稻作技术论文汇编》2017年
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Effects of mechanical transplanted methods on yield formation of rice following winter wheat

何海兵  尤翠翠  杨茹  朱德权  武立权  
【摘要】:[Objective]The objective of this 2-year field experiments were to compare the grian yield under three different mechanical rice-planting methods.[Methods]Using cultivars Chunyou84(japonica hybrid rice) and Zhendao18(conventional japonica rice) in 2014,and cultivars Yongyou538(Japonica hybrid rice) and Zhendao18 in 2015 as materials,the growth characteristics,canopy architecture and their effects on grain yield formation for rice transplanted by different methods were determined.The three treatments were a blanket-type nursery tray(Flat-S treatment),a bowl-type nursery tray(Pot-S treatment),and a pot-style/blanket-type nursery tray(Pot-flat-S treatment).The sowing rate refers to field production across both years and all three cultivars.In the Pot-S treatment,each tray was sown with the 2 BD-300 seeding machine(LSP-40 AM;Yameike Inc.,China) contained about 1800 seeds(3 seeds per hole,and 448 holes).In the Flat-S and Pot-flat-S treatment,each tray was sown with the 2 BZP-800 machine(SR-K800 CN;Kubota Inc.,Japan) contained approximately 2300~2600 seeds(60 g seeds).For all treatments,the 25-day-old seedlings were machinical transplanted to field with three plants per hill in both years.And,plant spacing was 33 cm×12 cm(row lengthx row width) in the Pot-S treatment,and 30 cm×13.2 cm(row lengthx row width) in other treatments.The net photosynthetic rate,leaf area index,dry matter accumulation,and matter translocation from the sheath at flowering to the kernel were significantly higher in the Pot-S treatment than that in other two treatments(p0.05).[Results]The Pot-S treatment(9.15-11.81×10~3 kg hm~(-2)) showed the highest grain yield,followed by the Pot-flat-S treatment(8.84-10.62×10~3 kg hm~(-2)),and then the Flat-S treatment(8.3-9.78×10~3 kg hm~(-2)) across three cultivars and two years.The relative heights of the1~(st),2~(nd),and 3~(rd) leaves from the top of the plant were higher in the Pot-S treatment than that in the other two treatments,and there was more space between adjacent leaves at the top of the canopy in the Pot-S treatment than in the other two treatments.The relative height of the 1~(st) and 2~(nd) leaves,the droop angle of the 1~(st) and 2~(nd) leaves,and the height difference between the 1~(st)and 2~(nd) leaves affected the source and sink traits,and therefore,significantly affected yield.[Conclusion]Thus,the spatial distribution characteristics of the 1~(st) and 2~(nd) leaves were crucial for the high yield formation of mechanically transplanted rice.
【作者单位】:安徽农业大学农学院 安徽农业大学工学院
【基金】:国家重点研发计划(2016YFD0300505;2016YFD0300608;2017YFD0301305) 安徽省教育厅自然科学基金(KJ2016A842)
【分类号】:S233.71
【正文快照】:
Effects of mechanical transplanted methods on yield formation of rice following winter wheat@何海兵$安徽农业大学农学院!安徽省合肥市230036 @尤翠翠$安徽农业大学农学院!安徽省合肥市230036 @杨茹$安徽农业大学农学院!安徽省合肥市230036 @朱德权$安徽农业大学

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