几个高生物量糖能兼用甘蔗新品种特性及营养吸收特性研究

Varietal Characteristics and Nutrition Characteristics of Several New Varieties of High Biomass Sugarcanes for Sugar and Energy

[目的]研究桂糖02-833、桂糖97-69、桂糖02-351、桂糖03-2287、B9、桂糖02-770 6个糖能兼用甘蔗新品种特性及在高产滴灌栽培条件下的营养吸收特性。[方法]分别测定各参试品种的工艺性状、农艺性状和全氮、全磷、全钾及叶绿素含量。[结果]6个新品种的蔗茎产量、生物总量和含糖量分别达180、200、25 t/hm2以上,均高于对照品种新台糖22号。6个品种叶片全氮、全磷含量在甘蔗伸长期的7～11月份较高、持续时间长而稳定,12月份开始明显下降;而全钾含量在整个测定期间呈持续升高趋势;叶绿素含量在8～10月含量较高,11月份开始下降。桂糖02-833、桂糖97-69和B9全氮、全磷、全钾、叶绿素含量在整个测定时期均高于对照品种。[结论]桂糖02-833、桂糖97-69和B9是养分吸收和利用较强的高产优质糖能兼用甘蔗品种,在生产中应加以推广。

[Objective] The aim was to study the varietal characteristics of six new varieties of high biomass sugarcanes for sugar and energy namely GT02-833,GT97-69,GT02-351,GT03-2287,B9 and GT02-770,as well as the nutrition characteristics of them under drip irrigation conditions.[Method] Industrial and agronomic characters,total N,total P,total K and chlorophyll content were determined.[Result] Cane yield,total biomass yield and sugar content of six varieties were more than 180,200 and 25 t/hm2 respectively,which were higher than that of the control Xintaitang 22.The total nitrogen and total phosphorus contents of six varieties were high and persistent from Jul to Nov,but they decreased sharply in Dec.Total potassium content of all varieties increased from Jul to Dec.Chlorophyll content of all varieties were high from Aug to Oct,but they decreased sharply in Nov.Total nitrogen,total phosphorus and total potassium content of GT02-833,GT97-69 and B9 were higher than that of CK.[Conclusion] GT02-833,GT97-69 and B9 had characteristic of efficient use of nutrients,thus should be extended as elite varieties.