稀植栽培条件对春小麦旗叶与穗部性状影响的研究

以 11个春小麦品种为试验材料 ,稀植栽培处理条件下 ,研究了旗叶与穗部两个性状 ,并进行了产量效应析。结果表明 ,稀植处理延长了旗叶功能期 (0 .7～ 2 .4 d) ,增加了旗叶长、宽和叶面积 ,显著程度因品种而异 ;穗粒数、穗粒重、千粒重随稀植处理密度的降低 ,呈增长趋势 ,稀植对穗粒数与穗粒重的影响远大于对千粒重的影响 ;根据稀植效应分析 ,将供试品种分为 3种类型 ,一类为耐稀植型 ,包括东农 12 2、东农 12 4、龙麦 2 6、东农 12 5 ;一类为稀植型 ,包括东农 12 3、龙麦 15、东农 97- 4 0 5 6、龙麦 2 0、龙麦 2 9及克丰 6号 ;另一类为非稀植型 ,仅龙辐 10号属此类型。

Relationship between the flag lear and the grain weight per spike in spring wheat under lower density

The characters of flat leaf and grain weight per spike,and also their relationship were studied with 11 spring wheat varieties under lower density.The result showed that,In conditions of lower density,the flat leaf functional period were prolonged(0.7-2.4 d),and the length,width and area of flat leaf were increased;The grain number per spike,grain weight per spike and 1000-grain weight increased as the planting density droppid,lower density had much more influences on the grain number per spike and grain weight per spike than 1000-grain weight;according to the effective analysis,the 11spring wheat can be divided into three types,one was lower density-resistant type,concluded Dong nong 122,Dong nong 124,Long mai 26,Dong nong 125,the second type,was lower density type,concluded Dong nong 123,Long mai 15,Dong nong 97-4056,Long mai20,Long mai 29 and Ke feng 6,the third was non-lower density type,concluded long fu 10.