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为探讨桑天牛Apriona germari产卵分泌物对其产卵刻槽微生境的作用,选用构树树干设置野外接虫和人工封槽两种处理,取样测定和分析了桑天牛产卵分泌物对其产卵刻槽微生境含水量、pH值和微生物数量的影响。结果表明:产卵4日内每日的人工封槽刻槽含水量均显著低于对照(P<0.05),4日后均高于对照,产卵刻槽含水量的日变化与对照相似。产卵5日内,人工封槽刻槽和产卵刻槽处树皮的pH值波动与对照基本一致,5日后,二者均高于对照,但同日的人工封槽刻槽与产卵刻槽pH值无明显差异(P>0.05)。产卵刻槽、人工封槽刻槽与对照细菌数量比较如下:产卵后第2日人工封槽刻槽显著高于对照和产卵刻槽(P<0.05);新制作与产卵后第1,6,7和8日人工封槽刻槽均达到极显著水平(P<0.01);第3日对照组的细菌数量(1320.0±189.0)极显著高于人工封槽刻槽和产卵刻槽(P<0.01);第4日人工封槽刻槽显著高于产卵刻槽(P<0.05),但与对照无显著差异(P>0.05);第5日三者差异不显著(P>0.05)。分析表明桑天牛产卵分泌物具有维持刻槽微生境含水量稳定的作用,对刻槽处树皮pH值无明显影响,对细菌数量的增加有一定抑制作用。
In order to investigate the effect of spawning secretions of Apriona germari on their ovipositing groove micro-habitat, we selected two kinds of treatments: wild pickworms and artificial sealer, and measured and analyzed the spawning secretions The effects of water content, pH value and microbe quantity on the micro-habitat of laying eggs. The results showed that the daily water content of artificial sealer was significantly lower than that of the control (P <0.05) within 4 days of oviposition, and higher than that of the control after 4 days. The diurnal variation of water content in laying grooves was similar to that of the control. Within 5 days after spawning, the fluctuation of pH value of artificial seal groove and spawning groove was basically consistent with that of the control. After 5 days, both of them were higher than the control, but on the same day the artificial seal groove and spawning groove No significant difference in pH (P> 0.05). The numbers of spawning grooves, artificial sealing grooves and control bacteria were as follows: The number of artificial seal groove on the 2nd day after spawning was significantly higher than that on the control and ovipositing grooves (P <0.05) The number of bacteria in the sealing ring on day 1, day 6, day 7, and day 8 were significantly (P <0.01). The number of bacteria in the control group on the third day (1320.0 ± 189.0) was significantly higher than that on the artificial seal (P <0.01). On the fourth day, the artificial groove sealing was significantly higher than that on the oviposition (P <0.05), but no significant difference with the control (P> 0.05). On the fifth day, the difference was not significant > 0.05). The analysis showed that the spawning secretions of Morus alba had the effect of keeping the water content of the groove micro-habitat steady and had no obvious effect on the pH value of the tree bark at the groove, which inhibited the increase of the bacterial number.