摘要
为了研究氮磷钾元素配比施肥对南方引种的彩叶树种的叶色保持和生长发育的影响,选用1 a生的彩叶树种金叶水蜡扦插苗,统计正常保持金黄叶色的植株数,并开展氮磷钾3因素3水平的施肥正交试验。研究结果表明:约95%的扦插苗可以正常保持金黄叶色,全部复绿扦插苗所占的比例≤1%;控制磷钾肥的用量有利于叶色保持、减少开花比例;当提高磷肥的用量时,对株高和冠幅会产生负面的影响;为保证新梢生长量,最优的氮浓度为9.2 g·株^-1,最优的磷浓度为3.2 g·株^-1,最优的钾浓度为2.2 g·株^-1;在稳定磷钾肥施用量的情况下,可以适当增加氮肥的施用量。
In order to study the effects of nitrogen,phosphorus and potassium nutrition on leaf color retention and growth of the color-leaf tree species introduced from South China,the 1-year-old cuttings of the color-leaf tree species—Ligustrum obtusifolium‘Jinye’were selected 1to count the number of plants with normal golden leaf color,and the orthogonal experiment of nitrogen,phosphorus and potassium 3 factors and 3 levels of fertilization was carried out.The results showed that:about 95%of the cuttings could retain the golden leaf color normally and less than 1%of the cuttings returned to green;the control of the amount of phosphorus and potassium fertilizer was conducive to the leaf color retention and the reduction of flowering rate;when the amount of phosphorus fertilizer was increased,the plant height and crown width would be negatively affected.In order to ensure the growth of new shoots,the optimal nitrogen concentration was 9.2 g/plant,the optimal phosphorus concentration was 3.2 g/plant,the optimal potassium concentration was 2.2 g/plant,and the amount of nitrogen fertilizer could be appropriately increased under the condition of stable phosphorus and potassium fertilizer application rate.
作者
耿芳茹
郭小妞
邓泽君
王畅
姚振
鄢明伟
朱桂才
Geng Fangru;Guo Xiaoniu;Deng Zejun;Wang Chang;Yao Zhen;Yan Mingwei;Zhu Guicai(College of Horticulture and Gardening,Yangtze University ,Jingzhou 434025;Jingzhou Jiangling Green Giant Landscape Engineering Company, Jingzhou 434100)
出处
《湖北林业科技》
2020年第6期13-17,共5页
Hubei Forestry Science and Technology
基金
湖北省荆州市科技计划项目(2019EC61-12)
长江大学创新创业计划“青年红色筑梦之旅”(TZB-17-002128)。
关键词
黄金水蜡
叶色保持
氮磷钾营养
Ligustrum obtusifolium‘Jinye’
leaf color retention
nitrogen,phosphorus and potassium nutrition
