...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Acta Horticulturae >Increasing N uptake in elevated CO_2 conditions through manipulation of NO_3:NH_4 ratio in fertigated tomatoes
【24h】

Increasing N uptake in elevated CO_2 conditions through manipulation of NO_3:NH_4 ratio in fertigated tomatoes

机译：Increasing N uptake in elevated CO_2 conditions through manipulation of NO_3:NH_4 ratio in fertigated tomatoes

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

Elevated CO_2 (eCO_2) causes an increase in biomass but a decrease in plant N concentration, leading to increased N deficiency. While increasing N fertilization may ameliorate eCO_2 induced N deficiency (eCIND), it is not necessarily environmentally feasible. In this study, we examine whether manipulation of the NO_3:NH_4 ratio can ameliorate eCIND. Tomato plants were grown in greenhouse chambers with 2 levels of CO_2 (400, 850 ppm) and 4 levels of NO_3:NH_4 in the irrigation water (100:0, 67:33, 33:67, 0:100). Biomass and leaf N concentration were measured. Total leaf N uptake and nitrogen use efficiency (NUE) were calculated. We found that eCO_2 caused a decline in N concentration. In the low N concentrations used in this experiment, manipulating the NO_3:NH_4 ratio did not change the N concentration in the leaves nor did it ameliorate the negative effect of eCO_2 on leaf N concentration. However, treatments that included a mix of NO_3 and NH_4 lead to greater N uptake in both ambient CO_2 and in elevated CO_2, leaving open the possibility of using NO_3:NH_4 manipulation as a tool for ameliorating eCIND in future eCO_2 conditions, perhaps in higher N conditions.

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号