摘要
在施氮总量相同的条件下,比较NO3--N、NH4+-N的比例分别为1∶0、2∶1、4∶1、6∶1、10∶1和0∶1时对文心兰"黄金2号"生长发育的影响。试验结果表明,文心兰"黄金2号"苗期和花期生长发育的最佳N源是NO3--N/NH4+-N为10∶1,其次为6∶1;随着NO3--N比例的增加,文心兰植株体内N、K含量呈上升趋势,NH4+-N利于根部对Ca,Mg素的吸收,NO3--N利于茎部对Ca,Mg的吸收;在文心兰整个生长发育阶段,中苗期至花芽分化期对N,K元素的吸收最旺,对P,Ca,Mg整体吸收量较小且呈缓慢下降趋势。
Oncidium was cultured by applying with the same total amounts of nitrogen fertilizer at different ratios of NO3^- -N to NH4^＋-N, 1： 0, 2 ： 1, 4： 1, 6 ： 1, 10 ：1 and 0 ： 1. The experiment indicated that the nitrogen fertilizer at the ratio of 10：1 was the best for the growth and development and flowering of the Oncidium, followed by that at the ratio of 6 ： 1. With the increase of NO3^- -N in the ratio, the N and K content in the plant tended to increase gradually. The NH4^＋-N was conducive to the intake of Ca and Mg by roots, while the NO3^- -N to the intake of Ca and Mg by the stem. In the whole process of the growth and development period the Oncidium showed a highest absorption of N and K during the period from middle nursery stage to floral bud differentiation stage, and a small and decreasing absorption of P, Ca and Mg as a whole.
出处
《热带农业科学》
2009年第7期36-42,共7页
Chinese Journal of Tropical Agriculture
基金
科技部国家科技支撑计划项目(No.2007BAD45B06)
中国级公益性科研院所基本科研业务专项(No.PZS048)
关键词
文心兰
不同N源
生长发育
矿质元素含量
Oncidium Sw.
nitrogen sources
growth and development
mineral element content
