氮硫配施对早熟玉米叶片衰老的影响

Effect of Sulfur and Nitrogen Fertilizer Combined Application on Leaf Senescence of Early Maturing Maize

以早熟品种晋单84作为研究对象,开展了氮硫配施对玉米叶片衰老的影响试验。结果表明,在硫氮水平较低的条件下,施用硫肥可以有效地提高玉米对氮素的累积,而随着氮水平的提高,在高氮条件下增施硫肥则对氮素的累积的影响不太显著。在低氮条件下,施用硫肥可以提高玉米叶片的叶绿素含量,但随着硫肥施用量的提高,在高硫条件下反而抑制了叶片的光合能力。高氮条件下,施用硫肥可以有效地提高玉米叶片的叶绿素含量,增强叶片的光合能力,随着硫肥施用量的提高,这种促进作用变得更强。

The test used jindan 84 as the research object, result showed that under the condition of low sulfur and ni- trogen levels, the application of sulfur fertilizer could effectively improve the accumulation of nitrogen in maize, and with the increase of nitrogen level, the effect of sulfur fertilizer on nitrogen accumulation was not significant under high nitrogen condition.Under low nitrogen condition, the content of chlorophyll in leaves of maize could be in- creased by applying sulfur fertilizer, however, with the increase of the amount of sulfur fertilizer, the photosynthetic capacity of the leaf was inhibited under high sulfur condition.Under the condition of high nitrogen content, the appli- cation of sulfur fertilizer could improve the chlorophyll content of maize leaves, and enhance the photosynthetic ca- pacity of the leaves.