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目的研究不同时间、不同采集地的防风挥发油量与防风根际土壤相关性。方法水蒸气蒸馏法提取防风挥发油,检测其成分;根据国家标准规定方法测定根际土壤pH,水解N,速效P、K,全N及有机质的量,用SPSS13.0软件分析数据。结果防风挥发油量随采集地不同由南至北递减,所含成分明显不同,但均以1-甲酰基-4-(1-丁烯-3基)-苯和β-没药烯为主。防风挥发油量与其根际土壤全N之间呈显著幂相关,与水解N呈显著非线性相关,而速效P、K、有机质,只一批样品之间呈较好的相关性。土壤自身pH、水解N与速效P之间,水解N、速效P与速效K之间,水解N、速效P、速效K与有机质之间显著相关(P<0.01);土壤pH与水解N、速效K之间显著相关(P<0.05)。结论防风挥发油量在不同采收期差异无规律性,但其产率受根际土壤全N量的抑制作用显著,随其量的增加而显著降低,而水解N、速效P、K及有机质量适宜时可显著提高挥发油产率。土壤pH则可以通过调节土壤其他化学性质而影响防风挥发油的量。
Aim To study the correlation between windbreak volatile oil content and windbreak rhizosphere soil in different time and place. Methods Volatile oil was extracted by steam distillation and its composition was determined. The rhizospheric pH, hydrolyzed N, available P, K, total N and organic matter were determined according to the national standards. The data were analyzed by SPSS13.0 software. Results The results showed that the amount of windbreak volatile oil decreased gradually from south to north with different collection sites, and the contents of windbreak volatile oil were obviously different. However, the content of windbreak volatile oil was dominated by 1-formyl-4- (1-buten-3yl) -benzene and β-adrenocene. There was a significant power-related relationship between the amount of windbreak volatile oil and total N in rhizosphere soil and a significant nonlinear correlation with N hydrolysis, while available P, K, organic matter and only one batch of samples showed good correlation. Soil pH, hydrolysis N and available P, hydrolysis N, available P and available K, hydrolyzed N, available P, available K and organic matter were significantly correlated (P <0.01) K significant correlation (P <0.05). The results showed that there was no significant difference in the yield of windbreak volatile oil at different harvest time, but its yield was significantly inhibited by total N in rhizosphere soil and significantly decreased with the increase of its amount. However, N, P, K and organic mass When appropriate, can significantly improve the yield of volatile oil. Soil pH can affect the amount of wind-resistant volatile oil by adjusting other chemical properties of the soil.