茉莉花产量与氮营养关系研究

Study on the Relationship Between Yield and Nitrogen Nutrition of Jasmine

[目的]研究茉莉花产量与土壤氮含量、植物氮含量的关系,为提高茉莉花产量提供氮营养管理科学依据。[方法]通过调查、采样、测试和统计分析,对横州茉莉花产量与氮营养关系进行系统研究。[结果]土壤全氮含量1.65~2.45 g/kg和水解氮含量51.20~124.19 mg/kg是高产地块的必要不充分条件。土壤水解氮含量与根、枝、叶、花氮和诸多营养元素含量均达到显著或极显著负相关关系,而在高产地块土壤水解氮含量51.20~124.19 mg/kg的必要不充分条件下,均未达到显著相关,说明当土壤水解氮含量超过124.19 mg/kg后,可能由于土壤水解氮含量过高引起其他养分的不均衡吸收,结果导致根、枝、叶、花氮和其他营养元素含量显著降低,此种情况下不利于高产。茉莉花叶硼含量与土壤全氮含量呈显著正相关,而高产地块叶硼含量差异不明显。[结论]高产地块土壤全氮含量和水解氮含量范围分别为1.65~2.45 g/kg和51.20~124.19 mg/kg;高产地块根、枝、叶、花氮和其他诸多营养元素的含量与土壤氮含量相关性不显著。

[Objective]The research aimed to study the relationship between jasmine yield and soil nitrogen content,plant nitrogen content,and provide scientific basis for nitrogen nutrition management to improve jasmine yield.[Method]Through investigation,sampling,testing and statistical analysis,the relationship between nitrogen nutrition and Jasmine yield in Hengzhou was systematically studied.[Result]The soil total nitrogen content of 1.65-2.45 g/kg and the hydrolysis nitrogen content of 51.20-124.19 mg/kg were the necessary and insufficient conditions for high-yield plots.The content of soil hydrolyzable nitrogen was significantly or extremely significantly negatively correlated with the content of root,branch,leaf,flower nitrogen and many nutrient elements.However,under the necessary and insufficient conditions of soil hydrolyzable nitrogen content of 51.20-124.19 mg/kg in high-yield plots,there was no significant correlation,indicating that when the content of soil hydrolyzable nitrogen exceeded 124.19 mg/kg,it may be due to the unbalanced absorption of other nutrients caused by the high content of soil hydrolyzable nitrogen.As a result,the content of root,branch,leaf,flower nitrogen and other nutrient elements decreased significantly,which was not conducive to high yield.There was a significant positive correlation between leaf boron content and soil total nitrogen content in jasmine,but there was no significant difference in leaf boron content in high-yield plots.[Conclusion]The contents of soil total nitrogen and hydrolyzable nitrogen in high-yield plots were 1.65-2.45 g/kg and 51.20-124.19 mg/kg,respectively.There was no significant correlation between the content of root,branch,leaf,flower nitrogen and other nutrient elements in high yield land and soil nitrogen content.