不同角度倒伏对寒地水稻的影响

在大田栽培条件下,为探索和了解寒地水稻不同角度倒伏的变化特征,以寒地水稻垦稻12号为试验材料,比较了不同角度倒伏的寒地水稻植株干物质和形态变化规律,探索了不同倒伏角度水稻的空间部位分布动态变化情况。结果表明:倒伏前期水稻茎鞘干重表现为0°>45°>90°,节间重与节间长度的比值表现为0°<45°<90°。在倒伏前、后两个时期,水稻倒1、2叶片长度以及重量均以0°倒伏的作用强度最明显;而在株高和重心高度上均表现为0°>45°>90°,而在穗长与株高比值上的变化则正好与其相反。综合分析表明,0°倒伏水稻上部空间承受的压力要明显高于其它倒伏角度的水稻。

Effects of Different Angles of Lodging on Rice in Cold Region

A field experiment was conducted to study the changing principles of dry matter and morphology character using Kendao 12 as entry.The results showed that the order of dry matter of stem and sheath before lodging was 0°> 45°>90°,but the order of ratio of internode weight to internode length was 0°<45°<90°.Before and after lodging,the flag leaf and top second leaf had the obvious effect as the lodging angle was 0°.The order of plant height and gravity center height was 0°>45°>90°,but the ratio of spike length to plant height was contrary.Comprehensive analysis showed that the pressure borne in the upper space of rice at the zero degree was higher than those at other lodging angle.