不同种植年限黄瓜温室土壤线虫群落结构及多样性的比较
发布时间：2019-05-07 07:44
【摘要】：【目的】针对土壤连作障碍问题,以土壤线虫群落结构和多样性为研究重点,分析不同种植年限土壤生态系统间的差异,进而探讨不同种植年限温室土壤的健康状况。【方法】采集8年、10年、13年和16年温室黄瓜土壤,以1年露地土壤为对照,采用线虫形态学鉴定方法,分析不同种植年限土壤线虫群落结构及多样性的变化规律。【结果】不同种植年限共观测到土壤线虫属21个,全部为优势属和常见属;线虫总数和植物寄生线虫数量在不同种植年限的分布依次为10年16年13年8年1年,线虫总数种植年限之间差异显著,范围为每100 g干土61~437条;线虫群落生态指数对种植年限有不同的响应,土壤线虫群落多样性指数H′在不同种植年限土壤中的分布为16年13年1年8年10年,均匀度指数J为13年16年1年8年10年,而优势度指数λ的分布则为10年16年13年8年1年,5种不同种植年限土壤的NCR指数在0.6~9.8之间,WI分布为1年8年13年16年10年;线虫成熟指数MI在种植16年的温室土壤中最小,相反PPI/MI值则在种植16年的土壤中最大;丰富度指数SR随种植年限呈先升高后降低,10年的最低;线虫区系分布结果显示,除种植10年黄瓜土壤的样点落在第Ⅳ象限外,其余种植年限黄瓜土壤的样点均落在第Ⅰ象限。【结论】综合分析得出,连续种植会使土壤变得贫瘠,健康状况变差,受干扰程度变大,种植10年土壤线虫多样性、稳定性最差,土壤环境已受胁迫。
[Abstract]:[objective] to study the community structure and diversity of soil nematode in order to analyze the difference of soil ecosystem in different planting years, aiming at the problem of soil continuous cropping obstacle. [methods] Cucumber soil was collected for 8 years, 10 years, 13 years and 16 years, and compared with open soil for 1 year, morphological identification of nematodes was carried out. The community structure and diversity of soil nematodes in different planting years were analyzed. [results] 21 soil nematode genera were observed in different planting years, all of which were dominant genera and common genera. The total number of nematodes and the number of parasitic nematodes in different planting years were 10 years, 16 years, 13 years, 8 years and 1 year, and the total number of nematodes was significantly different, ranging from 61 to 437 nematodes per 100 g dry soil. The distribution of soil nematode community diversity index H 'was 16 years, 13 years, 1 years, 8 years, 10 years, and the uniformity index J was 13 years, 16 years, 8 years, 10 years, and the distribution of soil nematode community diversity index H' was 16 years, 13 years, 16 years, 8 years and 10 years. The distribution of dominance index 位 was 10 years 16 years 13 years 8 years and 1 year. The NCR index of soil with 5 different planting years was between 0.6 and 9.8 and the distribution of WI was 1 year 8 years 13 years 16 years and 10 years. The nematode maturity index (MI) was the smallest in greenhouse soil after 16 years of planting, on the contrary, the value of PPI/-MI was the largest in 16-year-old soil, and the richness index (SR) first increased and then decreased with the planting years, and the lowest in 10 years. The distribution of nematode flora showed that the sampling points of cucumber soil for 10 years fell in quadrant 鈪，
本文编号：2470888
[Abstract]:[objective] to study the community structure and diversity of soil nematode in order to analyze the difference of soil ecosystem in different planting years, aiming at the problem of soil continuous cropping obstacle. [methods] Cucumber soil was collected for 8 years, 10 years, 13 years and 16 years, and compared with open soil for 1 year, morphological identification of nematodes was carried out. The community structure and diversity of soil nematodes in different planting years were analyzed. [results] 21 soil nematode genera were observed in different planting years, all of which were dominant genera and common genera. The total number of nematodes and the number of parasitic nematodes in different planting years were 10 years, 16 years, 13 years, 8 years and 1 year, and the total number of nematodes was significantly different, ranging from 61 to 437 nematodes per 100 g dry soil. The distribution of soil nematode community diversity index H 'was 16 years, 13 years, 1 years, 8 years, 10 years, and the uniformity index J was 13 years, 16 years, 8 years, 10 years, and the distribution of soil nematode community diversity index H' was 16 years, 13 years, 16 years, 8 years and 10 years. The distribution of dominance index 位 was 10 years 16 years 13 years 8 years and 1 year. The NCR index of soil with 5 different planting years was between 0.6 and 9.8 and the distribution of WI was 1 year 8 years 13 years 16 years and 10 years. The nematode maturity index (MI) was the smallest in greenhouse soil after 16 years of planting, on the contrary, the value of PPI/-MI was the largest in 16-year-old soil, and the richness index (SR) first increased and then decreased with the planting years, and the lowest in 10 years. The distribution of nematode flora showed that the sampling points of cucumber soil for 10 years fell in quadrant 鈪，
本文编号：2470888
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