甘蔗新品种‘桂糖42号’对不同施氮水平的响应

New Sugarcane Variety ‘Guitang 42’ in Response to Different Nitrogen Levels

在磷钾肥得到满足的条件下,以我国甘蔗生产上的常规施氮水平即600kg/hm^2作对照,设置4种不同的施氮水平试验,探讨甘蔗品种‘桂糖42号’对不同施氮水平的响应。结果显示,‘桂糖42号’的最佳施氮量为150~300kg尿素/hm^2,其蔗产量达到95.17~96.21t/hm^2,单位面积含糖量达到14.07~14.97t/hm^2,试验结果进一步证明了‘桂糖42号’具有较强的生物固氮能力。

Under the conditions that phosphate and potassium fertilizers were well available, sugarcane variety Guitang 42 were applied with nitrogen at four different levels to estimate its response to nitrogen compared with conventional level of nitrogen, i.e. 600 kg/ha, in sugarcane production in China. The results showed that the optimum nitrogen application rate of Guitang 42 was 150-300 kg urea/ha, in which case the yields of cane and sugar were 95.17-96.21 and 14.07-14.97 t/ha, respectively. The experimental results further proved that Guitang 42 had a high biological nitrogen fixation ability.