穗重型小麦群体发育动态研究初报  

Studies onthePopulationDevelopmental Dynamic State of HighSpikeWeight Wheat

作　　者：庞红喜[1] 宋哲民[1] 闵东红[1] 

机构地区：[1]陕西省农业科学院,西北农业大学

出　　处：《西北农业学报》1997年第4期30-33,共4页Acta Agriculturae Boreali-occidentalis Sinica

摘　　要：对国内近年试验试种的穗重型小麦品种（系）群体发育动态研究表明：穗重型小麦单位面积冬季分蘖、春季分蘖、穗数和产量分别比对照（小偃６号和陕２２９）降低２４．５７％、３７．２１％、２９．０１％和１０．８７％；群体平均单穗粒重增加４６．４６％。分析认为，单位面积分菜数偏少的原因是：①穗重型小麦形成一个分蘖所需要的积温约为（９６．５４±１９．１）℃，比对照品种多４７％；②穗重型小麦的分蘖习性对低温反应敏感，对生态条件的适应范围小。In this study,population developmental dynamic state of typic high spike weightwheat varieties(lines ) were studiedsvstematically。Theresultsshowedthat numbers ofwintertiller,springtiller,spike numbersperhm2andyield ofthehighspikeweighttypewheatwere24. 57%,37. 21%,29. 01%and l0. 87%lower than those of CK(e. g Xiaoyan No. 6 and Shaan229). Seed weight per spike was 46. 46%higher than that of CK. Low numbers of til1er per hm2 ofthehighspike weight resultedinlow spikenumbers perhm2,andledtolowyield.Causesleadingless tiller per hm2 were :①Atiller of high spike weihgt type wheat required more accumu1atedtemperature than that of CK;②The tiller of high spike weight type wheat was more senstive to low temperature than thatof CK, andtheadapationof tiller characteristics of highspikeweighttypewheat to ecologicalcondition was more narrow thanthat of CK。

关 键 词：小麦 穗重型 发育动态 群体 

分 类 号：S512.101[农业科学—作物学]