论文部分内容阅读
以新台糖22号(ROC22)为试材,设15N标记尿素作基肥(5g/盆)(T1)、基肥(2.5g/盆)+分蘖肥(2.5g/盆)(T2)及基肥(1.5g/盆)+分蘖肥(1.5g/盆)+攻茎肥(2g/盆)(T3)3个处理,研究施氮方式对甘蔗氮肥利用效率的影响。结果表明,与T1比较,T2、T3极显著提高了甘蔗尤其是蔗根和蔗叶对氮肥的利用效率,其中T3的氮肥利用效率最高;3个处理间甘蔗植株的氮肥偏生产力、吸收的肥料氮、氮素分配率及氮肥利用率等数值差异均达显著水平。氮肥以基肥+分蘖肥+攻茎肥施用最有利于提高甘蔗产量和氮肥利用率。
Using ROC22 as testing material, 15N labeled urea was used as base fertilizer (T1), basal fertilizer (2.5g / pot) + tillering fertilizer (2.5g / pot) g / pot) + tillering fertilizer (1.5g / pot) + stalk fertilizer (2g / pot) (T3) to study the effect of nitrogen application on nitrogen use efficiency of sugarcane. The results showed that compared with T1, T2 and T3 significantly increased nitrogen use efficiency of sugarcane, especially cane and sugarcane, of which T3 had the highest nitrogen use efficiency. Nitrogen partial productivity, absorption of fertilizer Nitrogen, nitrogen allocation rate and nitrogen use efficiency and other numerical differences reached significant levels. Nitrogen fertilizer based on basal fertilizer + tillering fertilizer + stalk fertilization is most conducive to improve sugar cane yield and nitrogen use efficiency.