摘要
以张杂谷10号、晋谷21号为研究对象,在山西省太谷县申奉村试验田进行试验,在膜间进行3,6,9,12 L/hm~2等4个剂量的二甲戊灵处理,期间测定了倒二叶的光合色素含量、气孔导度、净光合速率(Pn)、胞间CO_2浓度(Ci)和蒸腾速率(Tr)。结果显示,施用二甲戊灵后,2种谷子幼苗叶片的光合特性参数均产生了不同程度的动态变化,3~9 L/hm~2剂量膜间喷施后,2个品种谷子叶片净光合速率均下降,除张杂谷10号的6 L/hm~2处理与CK间差异显著外,其余剂量与CK间无显著差异,9~12 L/hm~2剂量均对2个品种谷子的净光合速率产生影响。综上所述,膜间喷施二甲戊灵剂量在3~9 L/hm~2时可在张杂谷10号、晋谷21号谷田使用,二甲戊灵剂量>9 L/hm~2时对谷子的光合特性有明显的抑制作用。
In this paper, Zhangzagu 10 and Jingu 21 were taken as research objects, experiment was carried out in experimental field of Shenfeng village, Taigu county, Shanxi province. 3,6,9,12 L/hm~2 of Pendimethalin treatments were carried out between membranes. Photosynthetic pigment content, stomatal conductance, net photosynthetic rate(Pn), intercellular CO_2 concentration(Ci)and transpiration rate(Tr)were measured. The results showed that the photosynthetic characteristic parameters of the two millet seedlings changed in varying degrees after the application of Pendimethalin, and the net photosynthetic rate of the two millet varieties decreased after spraying with treatment of 3-9 L/hm~2, there was no significant difference between the other doses and CK except for the 6 L/hm~2 treatment of Zhangzagu 10 and CK. The treatment of 9-12 L/hm~2 had an effect on the net photosynthetic rate of two varieties of millet. In summary, when the treatment of Pendimethalin sprayed between the membranes is 3-9 L/hm~2, it can be used in Zhangzagu 10 and Jingu21 fields. The treatment of Pendimethalin>9 L/hm~2 has obvious inhibitory effect on the photosynthetic characteristics of millet.
引文
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