摘要
对杜鹃红山茶(Camellia azalea)苗期生长大量营养元素进行诊断,为指导杜鹃红山茶苗木科学施肥和高效培育提供依据。以杜鹃红山茶0.5年生嫁接苗为材料,用N、P、K三元二次正交旋转组合设计进行施肥试验,以处理12个月后嫁接苗N、P、K元素含量为依据,采用P/N、K/N、P/K作为诊断指标,计算相应系数并用诊断施肥综合法(DRIS)和指数法对N、P、K需求关系进行分析。杜鹃红山茶P和N元素含量最佳比值为0.074±0.108;K和N元素含量最佳比值为0.509±0.500;P和K元素含量最佳比值为0.148±0.090,建立杜鹃红山茶DRIS营养诊断指数表。杜鹃红山茶对N肥和K肥的反应比P肥更为敏感,栽培管理中应多施用N肥和K肥,促进苗木生长。
To provide theoretical basis for field management and rational fertilization of Camellia azalea,the macro-elements of seedlings were diagnosed on the nursery stage.The fertilization test was carried out by the quadratic orthogonal rotational combination design with three factors using six-month-old grafted seedlings.After 12 months treatment,the concentrations of N,P and K in grafted seedlings were determined.P/N,K/N,and P/K were calculated and used as diagnostic indicators to calculate the coefficient of variance,and then evaluated the demands of N,P and K using diagnosis recommendation of integrated system(DRIS)and index method.The result showed the optimum ration of elements P/N,K/N,P/K in C.azalea was 0.074±0.108,0.509±0.500,0.148±0.090,respectively.The result showed system(DRIS)dynastic indicated C.azalea was established,and the response of C.azalea on N and K fertilizers was more sensitive than that on P fertilizer.Therefore,more N and K fertilizers should be applied during culture of C.azalea seedlings to promote the growth status.
作者
朱报著
杨会肖
潘文
徐斌
杨晓慧
徐放
张卫华
廖焕琴
王裕霞
ZHU Bao-zhu;YANG Hui-xiao;PAN Wen;XU Bin;YANG Xiao-hui;XU Fang;ZHANG Wei-hua;LIAO Huan-qin;WANG Yu-xia(Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization/Guangdong Academy of Forestry,Guangzhou 510520,Guangdong China)
出处
《亚热带植物科学》
2020年第1期21-26,共6页
Subtropical Plant Science
基金
广东省科技计划项目(2016A020206001)
