划区轮牧对短花针茅荒漠草原植被及土壤的影响

The effect of rotation grazing on plants and soil of Stipa breviflora desert steppe

采用划区轮牧试验,在宁夏盐池县四墩子短花针茅（Stipa breviflora）荒漠草原研究不同划区轮牧方式对天然草地植被及土壤的影响,并探讨不同轮牧方式下的荒漠草原的健康状况.结果表明,试验区共出现26种植物,隶属于10科19属,其中多年生牧草占绝对优势,占出现植物种的90%以上.不同轮牧方式对物种组成有一定的差异,群落优势种发生了一定的变化.不同轮牧方式对草地植被盖度、地上生物量和物种密度均有显著地影响,但各指标变化并不一致;土壤有机质含量表现为：轮牧有利于增加0∽40 cm土壤有机质含量,封育有利于土壤粉粒含量的积累.选取3个植被特征指标和2个土壤特征指标对不同轮牧方式下短花针茅荒漠草原进行健康评价,各处理的健康程度排序依次为：2区轮牧〉6区轮牧〉4区轮牧〉连续放牧〉封育处理.

A research had been done on how rotation grazing effects plants and soil on natural grassland of Stipa breviflora desert steppe, it was conducted in Sidunzi of Yanchi, Ningxia province, and discussed desert steep health under the different rotational grazing methods. The result showed that the test area a total of 26 species of plants, belonging to10 families and 19 categories, among which the perennial grasses are dominants and above 90%.Different kinds of rotational grazing methods had a significant impact on species composition and vegetation coverage, above-ground biomass,species density, but the index change is not consistent; As for soil organic matter content, rotation grazing is beneficial to increase the 0∽40 cm soil organic matter content and fencing conducive to the accumulation of silt soil. Select three characteristics of vegetation index and two soil characteristics index under different rotational grazing system for Stipa breviflora desert steppe health evaluation, The processed health degree is sorted ： 2 area rotational grazing area 6 rotational grazing area 4 rotational grazing continuous grazing closure treatment.