多雨寡照年份不同玉米杂交种生育后期光合特性比较

在多雨、寡照的异常气候条件下,研究了4个玉米杂交种在高、低水肥条件下生育后期的光合特性。结果表明,多雨、寡照的异常气候条件下不同玉米杂交种的产量与水肥条件、叶面积的发展动态、本身的光合能力等密切相关,但各因素的影响力差别较大。多雨、寡照的异常气候对不同水肥条件下玉米杂交种的叶面积指数、叶片功能期的影响与正常条件下的一致,但对产量、光合速率等的影响与正常气候条件下有较大的差别。

The Comparison Between the Photosynthetic Characteristics of Different Maize Hybrids in Overabundant Rain and Poor Sunshine Year in Later Growth Stage

Under the sublime climate conditions of overabundant rain and poor sunshine,we researched on the photosynthetic characteristics in later growth stage of different maize hybrids which were planted in the fields with abundant or deficiency of water and fertilizer.The results showed that there was a correlation between the yield of these hybrids and their LAI,leaf function period,photosynthetic characteristics,etc.,but the degree was different.The effects of sublime climate to LAI and leaf function were in accord with in normal conditions,but the effects to yield and Pn were difference from that under normal conditions.