摘要
【目的】分析帕拉英达芒果叶片养分含量的变化规律,为确定芒果营养诊断指标及指导其科学施肥提供参考依据。【方法】选择云南保山地区管理规范且高产芒果园中长势正常的帕拉英达芒果树进行随机采样,分析第1蓬叶中氮、磷、钾、钙、镁和硫6种养分含量,根据各养分含量的年离均差、变异系数和年份间稳定性,确定进行叶片养分诊断的适宜采样时期和诊断指标。【结果】帕拉英达芒果叶片中氮、钙、镁和硫含量在2013~2015年的1月变异系数最小,分别为9.46%、22.76%、1.84%和3.58%,1月适宜作为帕拉英达芒果叶片营养诊断的采样时间,其营养诊断指标为:氮含量12.68~15.34 g/kg,磷含量1.05~1.19 g/kg,钾含量4.88~8.92 g/kg,钙含量14.10~22.40 g/kg,镁含量2.13~2.21 g/kg,硫含量1.24~1.34 g/kg。【结论】在云南保山地区,宜在每年1月采集第1蓬叶进行帕拉英达芒果叶片营养诊断。
[Objective]Variation rules of nutrition content in Palayinda mango leaves was analyzed, in order to provide reference for determining nutrition diagnose indexes and guiding scientific fertilization. [Method]Healthy Palayinda mango trees in well managed and high-yield Palayinda mango gardens in Baoshan, Yunnan were randomly sampled. Contents of nitrogen,phosphorus, potassium, calcimn, magnesium and sulfur in the first blade were studied. Appropriate sampling time and nutrition diagnosis indexes for leaf nutrition diagnosis were determined based on annual deviation from mean, coefficient of variation and stability between different years of each nutrition. [Result]Coefficient of variations of nitrogen, calcium, magnesium and sulfur were the smallest in January of 2013-2015, which were 9.46% ,22.76%,1.84% and 3.58% respectively. Therefore, January was suitable for sampling for Palayinda mango leaf nutrition diagnosis. The diagnosis indexes were as follows： nitrogen 12.68-15.34 g/kg, phosphorus 1.05-1.19 g/kg, potassium 4.88-8.92 g/kg, calcium 14.10- 22.40 g/kg, magnesium 2.13-2.21 g/kg and sulfurl.24-1.34 g/kg. [Conclusion]In Baoshan, Yannan, it is recommended that collecting first blade in January for Palayinda mango leaf nutrition diagnosis.
出处
《南方农业学报》
CAS
CSCD
北大核心
2017年第4期686-691,共6页
Journal of Southern Agriculture
基金
国家公益性行业(农业)科研专项项目(201203092-4-3)
海南大学中西部计划学科重点领域建设项目(ZXBJH-XK003)
关键词
帕拉英达芒果
叶片
养分含量
营养诊断
Palayinda mango
leaf
nutrient content
nutrition diagnosis
