摘要
为了解稗草(Echinochloa crusglli (L.) Beauv.)在不同刈割强度下资源分配特点,对其进行了3种刈割强度处理,分别测定了不同刈割强度条件下稗草的根、茎、叶、花(果)器官的生物量、株高、分蘖数,并对生物量和各器官生物量分配比例进行了对比分析。结果表明:从盛花期到结实期,在各处理条件下,根、茎器官生物量和分配比例下降,生殖器官生物量和分配比例上升,叶器官无明显变化规律;盛花期生殖分配比例为:轻度刈割(Y1)>对照≈重度刈割(Y3)>中度刈割(Y2),结实期生殖分配比例为:对照≈轻度刈割(Y1)≈重度刈割(Y3)>中度刈割(Y2);株高表现为轻度刈割促进其绝对高度的增加,而在中度及重度刈割条件下,表现为抑制作用;在重度刈割条件下,单株分蘖数与刈割强度呈正相关。
In order to understand the resource allocation pattern under different mowing intensities,there were three kinds of mowing intensities of treatment,the biomass of root,stem,leaf,flower（seed）,stem length and tiller number of Echinochloa crusglli（L.） beauv was measured.Biomass and the biomass allocation ratio were compared.The results indicated that from flowering stage to riping stage,biomass and biomass allocation to root and stem decreased in each treatment,the reproductive organs increased,and there was no significant change in leaf.Reproductive allocation ratio in flowering stage showed that light mowing（Y1）CK≈serious mowing（Y3） moderate mowing（Y2）,and CK≈light mowing（Y1）≈serious mowing（Y3）moderate mowing（Y2）in riping stage.Stem length was promoted under light mowing but restrainted under moderate and serious mowing.Tillers per plant and mowing intensity was positively correlated under serious mowing.
出处
《西南农业学报》
CSCD
北大核心
2011年第2期575-578,共4页
Southwest China Journal of Agricultural Sciences
基金
沈阳农业大学博士后基金
沈阳农业大学中青年硕士导师基金
关键词
稗草
刈割
干扰
生殖分配
Echinochloa crusglli（L.） Beauv.
Mowing
Interfere
Reproductive allocation
