氮肥对两个品种多花黑麦草生长和生理的影响

Effect of Different Nitrogen Fertilization Levels on Growth and Physiology of Two Annual Ryegrass Cultivars

在大田试验条件下,通过测定主要生长和生理指标,初步探讨了氮素水平对2个多花黑麦草品种生长生理的影响。结果表明:施用氮肥在适量范围内,多花黑麦草的分蘖数、株高和产量随着氮肥水平的提高增长,2个品种最高产施氮肥量相同,为300kg/hm2;2个多花黑麦草品种随着氮肥的增加叶绿素含量变化趋势不同;氮肥的施加同时会启动多花黑麦草抗逆防御系统,并且不同品种对氮肥的耐受性不同,美克斯比海克里斯抗逆性更强一些。

Under the field experiment conditions,through the determination of main growth and physiological indexes,the effect of different nitrogen fertilization levels on the growth and physiology of 2 annual ryegrass cultivars was discussed.It shows that if the application of nitrogen fertilizer is in an appropriate range,the tiller number,plant height and yield of annual Ryegrass will increase with nitrogen level increasing,and the highest yield of 2 varieties of nitrogenous fertilizer quantity is the same 300 kg/hm2 ; the chlorophyll content of 2 varieties increase along with nitrogen fertilizer; at the same time,nitrogen fertilizer applied will ignite the resistance defense system of the ryegrass,and the tolerance of different varieties for nitrogen fertilizer is different,Maximus being stronger than Hercules.