【摘要】 叶片光合性能是作物产量形成的物质基础与决定因素。为了明确南荻炭基土壤调理剂施用后的水稻增产效应,采用盆栽试验,以籼型两系杂交稻‘深两优5814’为试验材料,探究SC1、SC2、SC3三种不同配方的南荻炭基土壤调理剂施用对水稻抽穗日期、叶片光合性能及产量的影响。结果表明:①南荻炭基土壤调理剂施用后,水稻抽穗日期提前4～12 d,达显著促进效应,其中土壤调理剂SC3促进效应最佳;②与CK相比,土壤调理剂施用后水稻Pn显著提升22.8%～62.4%,其中土壤调理剂SC2的增效作用最显著。此外,土壤调理剂SC1施用后可显著提高水稻叶片Gs、Ci和Tr,较CK分别提高57.0%、8.2%和18.2%;③水稻叶片中与光合作用相关中微量元素也显著增加,其中Mg含量增加22.79%～24.80%,Fe含量增加82.2%～89.8%,且3种土壤调理剂间无显著差异(P>0.05);而对P含量的增加效应,土壤调理剂SC1显著高于SC2和SC3;④与CK相比,三种土壤调理剂对水稻的增产率达24.2%～35.0%,SC2的增产效果最佳。综上所述,南荻炭基土壤调理剂施用后通过促进水稻抽穗日期的提前,提高水稻光合效率,从而促进水稻产量的提高。更多还原

【Abstract】 Leaf photosynthetic charateristics are material basis and determinants of crop yield formation. In order to explore the effects of applying M. lutarioriparius-derived biochar soil conditioner on rice yield-increasing,this paper conducted pot cultivation experiment; took indica two-line hybrid rice "Shenliangyou 5814"as test material; and studied the effects of applying Miscanthus lutarioriparius-derived biochar soil conditioners of 3 different treatments SC1,SC2,SC3 on rice heading date,leaf photosynthetic property and rice yield. Results showed that ① after applying M. lutarioriparius-derived biochar soil conditioner,the rice heading date was 4 ～ 12 d in advance,showing significant accelerating effect. Among the 3 soil conditioners,SC3 had the best accelerating effect. ② Compared with CK,after applying soil conditioner,rice Pn was significantly enhanced by 22.8% ～ 62.4%. Soil conditioner SC2 had the most significant synergia effect. Besides,after applying soil conditioner SC1,Gs,Ciand Trof rice leaf blades were markedly improved than those of CK by 57. 0%,8. 2% and 18. 2%,respectively. ③ The accumulation of photosynthetic related trace elements in rice leaves were significantly increased,the contents of Mg,Fe were increased by 22.79% ～ 24. 80%,82. 2% ～ 89. 8%,respectively. And there were no significant differences between these 3 soil conditioners(P> 0.05). As for P content increasing effect,soil conditioner SC1 was obviousely higher than SC2 and SC3. ④ Compared with CK,rice yield increasing rate of these 3 soil conditioners could reach 24.2% ～35.0%. Soil conditioner SC2 had the best yield increasing effect. In conclusion,applying M. lutarioriparius-derived biochar soil conditioner could advance rice heading date,improve rice photosynthetic efficiency,therefore promote the increase of rice yield.更多还原