National Science Library, Chinese Academy of Sciences
  登录 机构网站 ENGLISH
您当前的位置是:首页->详细浏览

期刊名称: JOURNAL OF AGRICULTURAL SCIENCE
Volume:115    Page:355-362
ISSN:0021-8596

STORAGE ROOT QUALITY IN SUGAR-BEET IN RELATION TO NITROGEN UPTAKE期刊论文

作者: POCOCK TO MILFORD GFJ ARMSTRONG MJ

服务链接:
页码: 355-362
被引频次: 31
出版者: CAMBRIDGE UNIV PRESS
期刊名称: JOURNAL OF AGRICULTURAL SCIENCE
ISSN: 0021-8596
语言: English
摘要: The relationships between the amounts of nitrogen fertilizer applied and taken up by sugarbeet crops and the concentrations of sugar and alpha-amino-N in the storage root were examined using data obtained from fertilizer-response trials on different soils in the UK and Belgium between 1974 and 1985. On unmanured mineral soils, crop uptakes of N without fertilizer ranged from 65 to 190 kg/ha and increased linearly with the amount of fertilizer N applied. On organic soils or mineral soils that had received large applications of organic manure, crop uptakes of N were very large (295-383 kg/ha) and were not increased by applications of fertilizer N. The amino-N contents of harvested beet increased with crop N uptake. The distributions of crop N to the storage root and of storage-root N to amino-N differed, especially in manured, diseased and drought-affected crops. Greater proportions of crop N were present in the storage roots of manured crops than in conventionally fertilized crops, and more of the storage-root N was present as amino-N in crops affected by virus yellows or drought than in healthy, unstressed crops. The fresh weight concentrations of sugar in the storage root also differed between sites and years but were not consistently reduced by applications of fertilizer N at individual sites. However, when compared across sites, concentrations were negatively correlated with crop N uptakes and the amounts of N in storage roots. This was because particular crops grown on mineral soils with large applications of manure or on organic soils had large N uptakes and exceptionally low concentrations of sugar. The physiological implications of these relationships between N uptake and amino-N and sugar accumulation are discussed.
相关主题: AGRICULTURE, DAIRY & ANIMAL SCIENCE, YIELD, AGRICULTURE, GROWTH, FERTILIZER, BEET,

相关文献推荐:

问图书管理员更多图书管理员

学科咨询馆员
学科馆员

电话:
邮件:
问图书馆员

图标说明

在线获取原文 原文传递 详细信息 图书在架状态 图书馆际互借 问图书馆员

常见问题

图书馆开放时间 图书馆位置 借阅要求 您在使用中发现的任何错误,都可以向我们 【报告错误】,非常感谢!

作者信息:×