Six sugarcane varieties, GT11, ROC16, B1, B3, B5 and B8, were grown in the barrels without nitrogen fertilization.The indexes in relation to photosynthesis were investigated.

• 巴西甘蔗固氮品种B1、B3、B5、B8与本地甘蔗品种桂糖11号、新台糖16号种植于光温大棚的塑料桶中,不施氮肥,研究无氮肥条件对参试品种的光合特性的影响。