广宁红花油茶叶片营养DRIS诊断

摘要

In order to provide theoretical basis for field management and rational fertilization in Camellia semiserrata, taking one-year-old C. semiserrata seedlings as research subjects, the nutrients dynamics in the leaves were studied with Diagnosis and Recommendation Integrated System (DRIS) method. Based on N, P and K concentrations in the leaves of C. semiserrata from June to November, using ratios of N and P, K and P, N and K as diagnostic indicators, the optimum concentration ratio of N and P elements in C. semiserrata leaves is 10.21+ 1.30, that ofN and K elements is 2.11 + 0.08, and that of K and P is 5.29 + 0.64, respectively. DRIS nutrition diagnosis index table of C. semiserrata is established, and response of C. semiserrata on N, K fertilizers is more sensitive than response on P fertilizer.%为给广宁红花油茶的田间管理和合理施肥提供理论依据,以广宁红花油茶1年生播种苗为研究对象,运用DRIS指数法对其叶片进行营养诊断.结果表明,以6～11月份广宁红花油茶叶片N、P、K元素浓度测定值为依据,采用N和P、K和P、N和K的比值作为诊断指标,广宁红花油茶叶片N和P元素浓度最佳比值为10.21±1.30;N和K元素浓度最佳比值为2.11±0.08;K和P元素浓度最佳比值为5.29±0.64.建立了广宁红花油茶DRIS营养诊断指数表,得出结论:广宁红花油茶对N、K肥的反应要比P肥更为灵敏.