新疆奎屯草场甲螨类生态学研究

文本重点阐述了新疆奎屯垦区一二四团草场甲螨的季节、昼夜数量消长,甲螨越冬和若虫数量消长等生态规律。并揭示在新疆特定自然条件下,甲螨全年分为活动期和越冬期。依据流行学考察,田螨全年可分为四个阶段。经鉴定新疆奎屯垦区一二四团草场,现有甲螨计9科12属12种,其中有4种为优势种。

ECOLOGY OF ORIBATID MITES IN THE PASTURE OF XINJIANG 124TH STATE FARM, KUITUN, XINJIANG

Investigations on the ecological patterns of oribatid mite were carried out during May. 1983-Nov. 1984 of Xinjiang 124th State Farm. Kuitun, Xinjiang. Twelve species of twelve genera beloinging nine families of oribatid mites were found and identified. Four species among them are predominant. The oribatid mites underwent active period and dormant period through one year in the particular natural condition of Xinjiang. From our quantitative survey, the peak of mite-numbers appeared in July and the plateau of it were kept for three months from July to September. The epidemic of cestode infection was coincidence with the patterns of seasonal fluctuations of the mite-numbers, i.e. the noninfection period of cestode was coincidence with the dormant period of oribatid mite from December to next March; the increasing infection period from April to June; the peak period of cestode infection from July to September; the recessional period of cestode infection from October to November. In the dormant period, dwelling in the humus layer, grass roots and soil, oribatid mites hide into deeper layers gradually as the temperature dropping.The mites are actively at dawn, mid-night and dusk and idly at noon, the average differences between the mite-numbers obtained at dawn and at noon was 34.92%.The quantitative survey revealed that the numbers of nymph of oribatid mite began to increase from April and reached it peak in June. After a decrease in July, a secondary peek was appeared in October. None nymph was found after November.The mite-numbers in alpine pastures was twice as much as those in the pasture in farming area. The mite-numbers in the tilled farming land was only 10.09% of that in the pasture of farmig area.