锡林郭勒几种草地类型基况评价

Study on Health Status of Xilinguole Grassland.

在草甸草原、典型草原及荒漠草原选取具代表性的草地型,通过当前植被草群产量中增加种、减少种及侵入种所占比例的多少将草原基况分为优秀、良好、中等、低劣四个等级,以评价草地资源的自然属性。研究结果表明:羊草+贝加尔针茅草地型基况优良,克氏针茅+糙隐子草草地型基况良好,冷蒿+克氏针茅草地型基况中等偏上,小针茅+无芒隐子草草地型基况中等。

Using ground location data of meadow steppe ,dry steppe,desert eteppe in early stage of twenty--first century and midterm of twenty century the dynamic changing of basic conditions about Xilinguole grassland through biomass of additive , reductive and intrusive species was analyzed. The results indicated that health status of grassland become more and more worse in last twenty years and different grassland types have different health status as follows： Leyrnus chinensis ＋Stipa baicalensis grassland type is in excellent situation , Stipa krylovii ＋ Cleistogenes squrrosa grassland type is in fine situation, Arternisia frigida ＋Stipa krylovii grassland type is in good situation and Stipa klemenzii ＋Clestogenes songgorica grassland type is in middle situation.