摘要
为了筛选养分高效甘蔗种质资源及培育养分高效甘蔗品种,采用系统聚类分析法,分别以地上部干重,植株N、P、K素吸收效率和利用效率为指标,将40份具有代表性的甘蔗近缘属植物进行了分类。结果表明,甘蔗近缘属植物地上部干重变幅为1.26～39.6kg/穴,变异系数为75.92%。‘云南82-85’地上部干重是‘象草82-21’的40.78%,但‘云南82-85’的N、P、K素利用效率分别是‘象草82-21’的4.9、1.7和3.2倍。不同类型甘蔗近缘属植物的地上部干重,N、P、K素营养效率的极差很大,可分为若干组,各组间差异显著,且同组内材料的N、P、K素营养效率之间也存在显著性差异。上述研究结果对选育营养高效的新型种质和阐明营养高效的生理机制具有一定参考价值。
In order to screen sugarcane germplasms of high nutrient efficiencies and breed sugarcane varieties for high nutrient efficiencies,the experiment was conducted to investigate the variations of shoot dry weight,plant absorption efficiency and utilization efficiency of N,P,K in 40 Saccharum relative genus by hierarchical cluster method.The results showed that the plant shoot dry weight of Saccharum relative genus ranged from 1.26 to 39.6kg per hill,the coefficient of variation was 75.92%.The shoot dry weight of‘Yunnan 82-85’was only 40.78% of‘napier grass 82-21’,but plant utilization efficiency of N,P,K was 4.9,1.7 and 3.2 fold of‘Yunnan 82-85’compared with those of‘napier grass 82-21’,respectively.The ranges of shoot DW,plant absorption efficiency and utilization efficiency of N,P,K in Saccharum relative genus were so large that they could be classified into some clusters.The differences among clusters were significant,and plant nutrition efficiency among N,P,K were also significant differences in the same clusters.The above results provide useful information for breeding novel sugarcane germplasms for high nutrient efficiencies and elucidating the mechanism of high nutrient efficiency in sugarcane.
出处
《中国农学通报》
CSCD
2012年第34期154-160,共7页
Chinese Agricultural Science Bulletin
基金
国家甘蔗产业技术体系"栽培与耕作研究室任务(营养管理与土壤肥料)"(CARS-20-3-1)
科技部科研院所技术开发研究专项"粤糖系列甘蔗新品种营养调控关键技术与示范"(2010EG111024)
广东省教育部产学研结合项目"甘蔗产业废弃物资源化利用关键技术研发"(2010B090400431)
关键词
甘蔗
养分效率
基因型差异
sugarcane
nutrient efficiency
genotypic difference
