摘要
氮肥对高产甜菜的干物质积累分配及产量和品质影响显著。以KWS2409为材料,在5种施氮处理(N0、N90、N180、N270、N360)下,研究了甜菜叶面积、叶面积指数及干物质积累与分配和产质量变化情况。结果表明,增施氮肥显著增大群体中后期的叶面积指数、群体总干物质积累量和块根含水量,显著降低收获时的根冠比和块根含糖率;块根产量和产糖量则随着施氮量增加,呈现先增后降的趋势。最高产糖量(13 892.64 kg/hm2)的施氮量为180 kg/hm2,块根产量为82 609.63 kg/hm2,含糖率为16.83%。施用氮肥块根产量的最大增幅为不施肥的38.2%,产糖量的最大增幅为不施肥的26.9%。实现甜菜高产高糖主要依靠高的土壤肥力条件。
Nitrogen application has significant effect on the accumulation and distribution of dry matter and yield and quality of sugar beet plant.Study was made on the effect of the five nitrogen levels（N0、N90、N180、N270、N360） on the leaf area and LAI and accumulation and distribution of the dry matter and yield and quality of sugar beet plant with the material of KWS2409.The results showed that the population＇s middle and deuteric leaf area index,the population＇s dry matter accumulation and water content of root tuber increased with increment of nitrogen supply,while the root cap ratio and the sugar content of harvest decreased significantly.With the nitrogen supplied increasing the root yield and sugar yield increased first then decreased.The nitrogen applied for the highest sugar yield（13 892.64 kg/hm^2） is 180 kg/hm^2,the root yield is 82 609.63 kg/hm^2,the sugar content is 16.83 percent.The maximum increment of root yield is 38.2 percent higher than those without fertilizer application,the maximum increment of sugar yield is 26.9 percent higher than those without fertilizer application.Achieving high yield and high sugar content in sugar beet depends mainly on the soil fertility conditions.
出处
《干旱地区农业研究》
CSCD
北大核心
2008年第5期55-59,共5页
Agricultural Research in the Arid Areas
基金
新疆高校科研基金项目(XJEDU2004G06)
关键词
糖用甜菜
氮肥
干物质积累与分配
块根产量
含糖率
sugar beet： nitrogen fertilizer ： accumulation and distribution of dry matter
root yield： sugar content
