摘要
为研究不同地膜覆盖对杂交谷子光合生理的影响,以张杂谷5号为供试材料,采用单因素随机区组设计,测定塑料地膜和不同液体地膜处理下谷子抽穗期倒三叶叶片的净光合速率(Pn)、叶绿素荧光参数及快速光响应曲线等指标。结果表明,地膜覆盖可以显著提高谷子的光能利用效率;塑料地膜(T1)和450 kg/hm2的液体地膜(T3)覆盖后,谷子叶片的Pn,PSⅡ实际光化学效率(ΦPSⅡ)、电子传递速率(ETR)和光化学淬灭系数(q P)均高于对照,且T1处理高于T3处理但差异不显著(P>0.05);荧光快速光响应曲线与净光合速率(Pn)变化一致。因此,塑料地膜和450 kg/hm2的液体地膜覆盖后,PSⅡ反应中心的能量捕获效率高,具有较强的光合能力。
The purpose of this experiment was to study the effects of different film mulch on the photosynthetic and physiological characteristics of foxtail millet, Zhangzagu 5 was chosen as the test materials, using single factor randomized block design, determination the photosynthetic rate（Pn）, chlorophyll fluorescence parameters and the fast light response curve of the inverted clover leaves of heading stage of hybrid millet on the plastic film and liquid film processing. The results showed that film mulch could significantly improve light use efficiency of foxtail millet. After plastic mulch （T1） and 450 kg/hm2 of liquid film （T3） coverage, the Pn, PS Ⅱ actual photochemical efficiency（ ΦPSⅡ ）, electronic pass rate（ETR） and photochemical quenching coefficient（qP） of foxtail millet leaves were higher than the control, and T1 treatment was higher than T3 treatment, but the difference was not significant （P 〉 0.05）. Fluorescence fast light response curve of the maximum electron transport rate （ETRmax） and half-saturation light intensity （EK） changed consistent as the Pn. So after the plastic film and 450 kg/hm2 of liquid film processing, PS Ⅱ reaction center energy capture efficiency was high, with strong photosynthetic capacity.
出处
《山西农业科学》
2015年第11期1389-1392,共4页
Journal of Shanxi Agricultural Sciences
关键词
谷子
地膜覆盖
叶绿素荧光参数
净光合速率
f oxtail millet
film mulch
chlorophyll fluorescence parameters
photosynthetic rate
