›› 2014, Vol. 26 ›› Issue (3): 0-556563.

• 作物科学 •    

套作模式下播期对不同熟性大豆碳氮代谢及产量的影响

王竹1,杨文钰2   

  1. 1成都农业科技职业学院,四川 成都 611130;2四川农业大学 农学院,四川 雅安625014
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2014-05-25 发布日期:2014-05-25

Effects of different sowing time on the carbonnitrogen metabolism and yield of soybean cultivars with different maturity under relaycropping pattern

WANG Zhu;YANG Wenyu   

  1. 1Chengdu Vocational College of Agricultural Science and Technology, Chengdu 611130, China;2College of Agronomy, Sichuan Agricultural University,Yaan 625014, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2014-05-25 Published:2014-05-25

摘要: 在“小麦—玉米—大豆”套作模式下,研究了不同播期对不同熟性大豆碳氮代谢及产量的影响。结果表明,早播(5月底)导致3种不同熟性大豆产量的降低,而晚播(7月上旬)能提高早熟品种(浙春3号)的产量,6月上中旬播种则能提高中熟品种(乐豆1号)和晚熟品种(贡选1号)的产量。 但3个品种中又以贡选1号的产量最高。究其原因,是由于晚熟品种生育期长,通过播期的调整,能缩短与玉米的生殖生长共生期,从而减轻生育前期玉米植株对其造成的弱光伤害,延长后期的独立生长期,整个生育期内,植株的碳氮代谢能力强,可溶性糖、淀粉和氮的含量以及蔗糖磷酸合成酶和谷氨酰胺合成酶活性都保持在较高的水平,且变化趋势朝着利于产量形成的方向发展,从而保证了高产。试验得出的最优组合为贡选1号在6月15日至6月22日播种。

关键词: 大豆, 套作, 播期, 熟性, 碳氮代谢, 产量

Abstract: The effects of different sowing time on the carbonnitrogen metabolism and yield of soybean cultivars with different maturity under wheatmaizesoybean planting pattern were studied. The results showed that early sowing caused reduction in the yields of three soybean cultivars; late sowing caused increase in the yield of earlymaturing variety (Zhechun No.3); sowing at earlymid June increased the yield of midmaturing variety(Ledou No.1) and the latematuring cultivar (Gongxuan No.1). The highest yield was obtained from Gongxuan No.1 in three soybean cultivars. The growth period of the latematuring cultivar (Gongxuan No.1) was the longest, and its symbiotic period of reproductive growth with maize could be shortened by adjusting sowing time, which could reduce the effect of shading stress on soybean during early growth stage and prolong soybeans single growth period. So the contents of soluble sugar, starch, nitrogen in leaf and stem, the activity of sucrose phosphate synthase(SPS) and glutamine synthetase(GS) in leaf were at a high level at each stage. Moreover, the change trend of carbonnitrogen metabolism in soybean plants was beneficial for high yield. In conclusion, the optimum combination of this experiment was Gongxuan No.1 and the sowing time from 15th June to 22nd June.

Key words: soybean, relayintercropping, sowing time, maturity, carbonnitrogen metabolism, yield