CAJ | 학술논문

采用萌发试验方法，研究了黑土滩人工草地土壤种子库的物种组成、密度、时空格局和物种多样性等特征，为黄河源区黑土滩退化草地改建成的人工草地群落演替的动态预测和持续利用提供一定的理论依据。结果表明：（1）土壤种子库中共有36种植物组成，隶属于16科。（2）土壤种子库在物种比例和发芽数比例上都表现出多年生草本植物〉一二年生草本植物〉灌木。（3）土壤种子库中禾本科植物是群落的优势种，经济型中优良牧草占最大比例。（4）土壤种子库中种子数量在垂直分布上呈现出由表层土壤向深层逐层减少的变化规律。（5）人工建植草地Margalef丰富度指数、Shannon—Wiener多样性指数和Pielou均匀性指数均随年龄的增长而呈下降趋势。
채용맹발시험방법，연구료흑토탄인공초지토양충자고적물충조성、밀도、시공격국화물충다양성등특정，위황하원구흑토탄퇴화초지개건성적인공초지군락연체적동태예측화지속이용제공일정적이론의거。결과표명：（1）토양충자고중공유36충식물조성，대속우16과。（2）토양충자고재물충비례화발아수비례상도표현출다년생초본식물〉일이년생초본식물〉관목。（3）토양충자고중화본과식물시군락적우세충，경제형중우량목초점최대비례。（4）토양충자고중충자수량재수직분포상정현출유표층토양향심층축층감소적변화규률。（5）인공건식초지Margalef봉부도지수、Shannon—Wiener다양성지수화Pielou균균성지수균수년령적증장이정하강추세。
The characteristics of soil seed bank for cultured grassland on Black germination test methods , such as species composition, density, spatial and temporal patte Soil Beach are studied by ms and species diversity,to provide a theoretical basis for Dynamic forecast about Community succession and sustainable use of the degraded grassland turned into the cultured grassland on Black Soil Beach in Yellow River source area. The results showed that：（1） There were 36 plant species in the soil seed bank, which belongs to 16 families. （2） Proportion of species and germination in the soil seed present as pattern,perennial herbaceous plants 〉 annual biennial herbage plants 〉 shrubs. （3） Gramineae are the dominant species in the community of soil seed bank and Fine pasture occupys the largest proportion in economic model （4 ） For the vertical distribution, the number of seeds in the soil seed bank represent a decreasing trend with soil depth increasing. （ 5 ） Margalef abundance index, Shannon - Wiener diversity index and Pielou evenness index tend to decrease with time past in cuhured grassland.