氮肥对高糖甘蔗品种的增效作用

The Synergized Effect of Nitrogen Fertilizer on Sugarcane Varieties with High Sugar Content

为了探索施用氮肥对高糖甘蔗品种的增效作用，2008年对高糖甘蔗品种粤糖00／236、桂糖00／122、96／154、96／211和F134（CK）宿根一季蔗园进行施用氮肥（尿素40kg／667m^2）试验。结果表明，在施氮条件下，4个品种与对照F134相比，蔗糖分含量增加2．33～4．69百分点，增产58．0％～73．1％，增糖104．6％～127．7％；不施氮肥条件下，蔗糖分含量增加2．46～4．89百分点，增产43．0％～91．6％，增糖74．7％～150．3％。施氮与不施氮相比，5个品种均表现出一致的增产增糖效应（增产11．5％～42．2％，增糖28．9％～67．3％），粤糖00／236、桂糖00／122、96／211增产36．2％～42．2％，增糖65．2％～67．3％。氮肥施用对粤糖00／236、桂糖00／122、96／211增效作用最明显，桂糖96／154增效作用差，生产上桂糖96／154应减少氮肥施用水平，发挥其节氮增效作用。

Five sugarcane varieties with high sugar content, Yuetang 00/236, Guitang 00/122, 96/154, 96/211 and F134 （CK） were tested by applying 40 kg/667m^2 urea to study the synergized effect of nitrogen fertilizer on sugarcane varieties with high surga content. The results showed that the sugra content, yield and sugar yield of Yuetang 00/236, Guitang 00/122, 96/154 and 96/211 varieties increased by 2.33～4. 69, 58.0～73.1 and 104. 6%～127.7~compared with CK under applying nitrogen fertilizer respectively, the sugar content, yield and sugar yield of Yuetang 00/236, Guitang 00/122, 96/154 and 96/211 varieties increased by 2.46%～4.89%, 43.0%～91.6 %and 74.7～150.3%compared with CK under without applying nitrogen fertilizer separately, and the yield and sugar yield of five tested varieties under applying nitrogen fertilizer increased by 11.5%～42. 2%and 28. 9%～67. 3% compared with those under without applying nitrogen fertilizer respectively. Applying nitrogen fertilizer had the significant effects on yield and sugar yield of Yuetang 00/236, Guitang 00/122 and 96/211 varieties and the increae range of yield and sugar yield was 36. 2 %～42.2 % and 65.2 %～67.3 % separately. Because applying nitrogen fertilizer had the poor synergized effect on 96/154 variety, the application level of nitrogen fertilizer should be controlled in cultivation of 96/154 variety.