小麦品种的耐肥性与光合作用

THE VARIETAL ADAPTABILITY TO HEAVY MANURING IN RELATION TO PHOTOSYNTHESIS IN WHEAT (TRITICUM AESTIVUM L.)

本试验以耐肥性不同的三个冬小麦品种为试材,研究了品种的耐肥性与光合作用的关系。结果表明,旗叶的光合速率顺序为;泰山一号(中度耐肥)>济南13(高度耐肥)>昌乐5号(不耐肥)。光合速率的绝对值虽因不同年度间环境条件的不同而有所变动,但品种间的差别则保持相对稳定。增施氮肥,能使昌乐5号的光合速率明显降低,而泰山一号和济南13的光合速率则因增施氮肥受到显著的促进。

The relationship petween the varietal adaptability to heavy manuring and net photosynthetic rate was studied and three wheat cultivars with different adaptability to heavy manuring were used in the experiment. Results indicated that the order of net photosynthetic rate of the flag leaf was: Taishan No.1 (adaptability moderate)>Jinan No.13 (strong)>Changle No.5 (weak).Although the absolute value of the net photosynthetic rate changed with various environmental conditions in different years, the differences among various Cultivars were relatively Stable. The net photosynthetic rate of the flag leaf of Changle No.5 decreased significantly, while those of Taishan No.1 and Jinan No.13 were enhanced greatly with increasing nitrogen supply. The decrease of the photosynthetic rate after anthesis could be enhauced by increas-ing nitrogen Supply.