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草甸湿地是银川平原干旱背景下特殊的湿地类型,对宁夏引黄灌区绿洲的健康发展至关重要。以银川平原草甸湿地常见禾草芨芨草(Achnatherum splendens)、赖草(Leymus secalinus)、拂子茅(Calamagrostis epigejos)为研究对象,通过野外采样、实验室分析,研究了3种禾草构件形态特征、构件生物量特征及配置比例,分析了3种禾草生境的土壤特征。结果表明:3种禾草的构件形态、构件生物量差异显著(P<0.05),其中芨芨草各构件特征值最大,赖草和佛子茅次之;3种禾草构件生物量分配策略既有共性,又存在差异(P<0.05),其生物量分配模式以种群能够实现持续生存和繁衍为终极目标;禾草生境的土壤理化性质在小尺度上各有不同,因而不同禾草常以单优群落分布,在景观格局上禾草生境则受制于银川平原草甸湿地盐渍化特征和土壤水分梯度差异。该研究为宁夏引黄灌区沟渠廊道生态建设和盐碱草地植被恢复提供了科学依据。
Meadow wetland is a special type of wetland under the background of drought in Yinchuan Plain, which is of vital importance to the healthy development of oasis in Yellow River Irrigation Area of Ningxia. Achnatherum splendens, Leymus secalinus and Calamagrostis epigejos were collected from the meadow wetlands in Yinchuan plain to study the morphological characteristics of the three species of grass species through field sampling and laboratory analysis. , Component biomass characteristics and the proportion of configuration, soil characteristics of three kinds of grass habitat were analyzed. The results showed that the morphological and component biomass of the three species of grasses were significantly different (P <0.05), among which the characteristic values of the components of A. gracilis were the highest, (P <0.05). The biomass allocation pattern takes the population as the ultimate goal of sustainable survival and reproduction. The soil physical and chemical properties of grassland habitat are different on a small scale. Therefore, In the landscape pattern, grassland habitat was controlled by the salinization characteristics of the meadow wetlands in Yinchuan Plain and the difference of soil water gradient. This study provides a scientific basis for the ecological construction of ditches and corridors and the restoration of saline-alkali grassland vegetation in irrigated areas of Yellow River in Ningxia.