CAJ | 학술논문

对小麦秸秆不同部位水浸提液对玉米田恶性杂草--牛筋草的化感作用进行了初步研究。通过室内生物测定法研究了小麦秸秆的不同部位（根、茎、穗）不同浓度水浸液(6.25、12.5、25、50、100 mg/mL)对牛筋草种子萌发和幼苗生长的化感作用。小麦秸秆不同部位水浸液处理的牛筋草发芽率依次为对照(84.5%)>根(71.3%)>茎(68.7%)>穗(58.7%)，发芽指数依次为对照(18.39)>根(12.82)>茎(6.77)>穗(6.07)。当根、茎、穗部水浸液浓度为6.25 mg/mL时，牛筋草根长分别比对照增加17.1%，17.8%及6.6%，而当其浓度为100 mg/mL时，牛筋草根长分别比对照降低25.6%、31.6%及95.6%。通过拟合剂量-效应曲线得到小麦秸秆根、茎及穗部水浸液对牛筋草根部生长的半数效应浓度EC50值分别为219.182、157.545、41.007 mg/mL。小麦秸秆根、茎、穗部水浸液对牛筋草种子的萌发均具有抑制作用，随着浓度的升高，牛筋草发芽率逐渐降低，发芽指数逐渐减少。其中，根部水浸液对牛筋草苗高无显著影响，茎、穗部水浸液只有在最高浓度处理下显著抑制其幼苗高度，但是对其根部生长均表现出“低促高抑”作用。
대소맥갈간불동부위수침제액대옥미전악성잡초--우근초적화감작용진행료초보연구。통과실내생물측정법연구료소맥갈간적불동부위（근、경、수）불동농도수침액(6.25、12.5、25、50、100 mg/mL)대우근초충자맹발화유묘생장적화감작용。소맥갈간불동부위수침액처리적우근초발아솔의차위대조(84.5%)>근(71.3%)>경(68.7%)>수(58.7%)，발아지수의차위대조(18.39)>근(12.82)>경(6.77)>수(6.07)。당근、경、수부수침액농도위6.25 mg/mL시，우근초근장분별비대조증가17.1%，17.8%급6.6%，이당기농도위100 mg/mL시，우근초근장분별비대조강저25.6%、31.6%급95.6%。통과의합제량-효응곡선득도소맥갈간근、경급수부수침액대우근초근부생장적반수효응농도EC50치분별위219.182、157.545、41.007 mg/mL。소맥갈간근、경、수부수침액대우근초충자적맹발균구유억제작용，수착농도적승고，우근초발아솔축점강저，발아지수축점감소。기중，근부수침액대우근초묘고무현저영향，경、수부수침액지유재최고농도처리하현저억제기유묘고도，단시대기근부생장균표현출“저촉고억”작용。
The objective is to study allelopathic effects of aqueous extracts from root, stem and spikes of wheat straw on the seed germination and seedling growth of goosegrass (Eleusine indica). A petri dish bioassay method was used to test the allelopathic effects. Germination rate of root, stem and spikes aqueous extracts was 71.3%, 68.7%and 58.7%respectively, while the control was 84.5%, and germination index was 12.82, 6.77, 6.07 respectively, while the control was 18.39. Compared with control, the root length increased by 17.1%, 17.8% and 6.6% respectively when the concentration of root, stem and spikes aqueous extracts was 6.25 mg/mL, but decreased by 25.6%, 31.6%and 95.6%respectively when the concentration was 100 mg/mL. EC50 was calculated through dose-response equation between different concentrations of root, stem and spikes aqueous extracts and root lengths, and the value was 219.182, 157.545, 41.007 mg/mL respectively. Aqueous extracts from root, stem and spikes of wheat straw all inhibited the germination of goosegrass, the germination rate and index decreased with the increasing concentration. Stem and spikes aqueous extracts inhibited the shoot length of goosegrass significantly only at the highest concentration, while root aqueous extracts had little effects. The root, stem and spikes aqueous extracts promoted the root growth of goosegrass at low concentrations but inhibited it at high concentrations.