摘要
于2021-2022年连续2年研究浅埋滴灌条件下不同氮肥基追比对甜菜叶片厚度、单位长度内的叶脉数量、株高、叶面积指数(LAI)、根冠比、单株干物质量、产量和含糖率的影响.结果表明,随氮肥追肥比例的增加,含糖率、叶片厚度和根冠比呈降低的趋势,而产量、产糖量、株高、叶面积指数和单株干物质积累量显著增加,N3处理(氮肥按基追比6∶4)比CK处理(氮肥全部基施)产量提高6.93％～8.04％、产糖量提高6.12％～8.94％.相关性分析表明,甜菜产量与株高、LAI、单株干物质量呈显著正相关关系,而与叶片厚度呈显著负相关关系.因此,浅埋滴灌条件下,氮肥按基追比6∶4有利于甜菜产量和产糖量的提高.
Abstract
The effects of nitrogen base fertilizer and topdressing ratio on leaf thickness,vein number per unit length,plant height,leaf area index(LAI),root-shoot ratio,dry matter accumulation per plant,yield and sugar content of sugar beet were investigated under shallow buried drip irrigation for two consecutive years from 2021 to 2022.The results showed that sugar content,leaf thickness and root-shoot ratio decreased with the nitrogen topdressing ratio increase,while yield,sugar yield,plant height,LAI and dry matter accumulation per plant of sugar beet increased significantly.The yield and sugar yield of N3 treatment(base fertilizer to topdressing 6:4 of nitrogen fertilizer)were increased by 6.93％-8.04％and 6.12％-8.94％,respectively compared with CK treatment.Correlation analysis showed that sugar beet yield was positively correlated with plant height,LAI and dry matter accumulation per plant,but negatively correlated with leaf thickness.Therefore,it is recommended that the ratio of base fertilizer to topdressing 6:4 of nitrogen fertilizer is beneficial to increase the yield and sugar yield of beet under shallow drip irrigation.
基金项目
内蒙古自治区农牧业青年创新基金(2021QNJJNO6)
现代农业产业技术体系建设项目(CARS-170701)
内蒙古自治区科技计划(2022YFDZ0065)
内蒙古自治区草原英才创新团队甜菜提质增效绿色栽培技术创新人才团队项目()
国家科技期刊平台
NSTL
万方数据