CAJ | 학술논문

本试验于大田条件下,研究了种植密度对冬小麦品种石新828在适晚播情况下生育后期旗叶光合特性及产量的调控效应.设置4个密度水平处理;利用CI-340光合测定系统和FMS-2型脉冲调制式荧光仪分别测定了光合特性的相关指标.试验结果表明,种植密度对石新828生育后期光合特性及产量的影响显著;每公顷基本苗330×10~4处理的旗叶叶绿素(Chl)含量、净光合速率(Pn)、PS II 潜在活性(Fv/Fo)及其最大光化学效率(Fv/Fm)均在生育后期始终表现出明显优势,且产量显著高于其他处理;每公顷基本苗210×10~4和270×10~4处理由于群体相对较小,表现出对轻度干旱逆境的脆弱性,390×10~4由于群体相对较大,封闭的小气候影响了个体的发育,最终均导致了产量的降低.小麦石新828在适晚播条件下,适宜种植密度为330×10~4基本苗/公顷.
본시험우대전조건하,연구료충식밀도대동소맥품충석신828재괄만파정황하생육후기기협광합특성급산량적조공효응.설치4개밀도수평처리;이용CI-340광합측정계통화FMS-2형맥충조제식형광의분별측정료광합특성적상관지표.시험결과표명,충식밀도대석신828생육후기광합특성급산량적영향현저;매공경기본묘330×10~4처리적기협협록소(Chl)함량、정광합속솔(Pn)、PS II 잠재활성(Fv/Fo)급기최대광화학효솔(Fv/Fm)균재생육후기시종표현출명현우세,차산량현저고우기타처리;매공경기본묘210×10~4화270×10~4처이유우군체상대교소,표현출대경도간한역경적취약성,390×10~4유우군체상대교대,봉폐적소기후영향료개체적발육,최종균도치료산량적강저.소맥석신828재괄만파조건하,괄의충식밀도위330×10~4기본묘/공경.
A field experiment was conducted to evaluate photosynthetic characteristics and grain yield in different planting densities of a winter wheat cultivar Shixin828 with sowing suitable late.It was studied under four different density levels;The photosynthetic characteristicsts were measured using CI-340 portable photosynthesis system and FMS-2 fluorescence monitoring system.The results indicated that the dsnsity can remarkably influence the Photosynthesis characteristies of flag leaf and yield level.The 330×10~4 basis seedlings per ha treatment had apparent advantages in chlorophyll content,photosynthesis rate,PSⅡpotential activity(Fv/Fo)and the maximal quantum efficiency of PSⅡphotochemistry(Fv/Fm)of the flag leaf at late growth period and the grain yield of it was higher than that of the others significantly.The 210×10~4 and 270×10~4 basis seedlings per ha treatments represent franfibility for gently drought as a result of less colony and the 330×10~4 basis seedlings per ha treatment influence individual growth with close microclimate as a result of great colony,both above reducing yield.The highest grain yield was observed in the treatment with 330×10~4 basis seedlings per ha applied.