遁耕对轻中度退化草原植被的影响

Effect of Grass-friendly Tillage on Vegetation of Slightly and Moderately Degenerated Grassland

为探索草地修复措施与方法对草地植被的影响,以河北省坝上地区轻中度退化草地为研究对象,采用遁耕施肥播种一体化技术措施开展草地修复试验,以相邻地块未进行遁耕处理为对照(CK),研究了不同遁耕措施(遁耕、遁耕+施肥、遁耕+保水剂、遁耕+施肥+保水剂)对退化草地生长量、多样性和植物群落优势度的影响。结果表明:退化草地遁耕后,可显著提高株高和地上部生物量,增大草地密度,提高Simpson优势度指数、Shannon-Wiener多样性指数和Pielou均匀度指数,丰富物种多样性,提高优质牧草羊草和冰草的种群优势度。遁耕可以作为轻中度退化草地修复技术进行推广。

In order to explore the impact of grassland restoration measures and methods on grassland vegetation,taking the slightly and moderately degraded grassland in Bashang area of Hebei Province as the research object,the grassland restoration experiment was carried out by using the integrated technical measures of grass-friendly tillage,fertilization and sowing.Taking the adjacent plots without grass-friendly tillage as the control(CK),the effects of different grass-friendly tillage measures(grass-friendly tillage,grass-friendly tillage+fertilization,grass-friendly tillage+water retaining agent,and grass-friendly tillage+fertilization+water retaining agent)on growth,diversity and plant community dominance of degraded grassland were studied.The results showed that the plant height and aboveground biomass,grassland density,Simpson dominance index,Shannon-Wiener diversity index and Pielou evenness index significantly increased,the species diversity enriched,and the species dominance of high quality forage Leymus chinensis and Agropyron improved.Grass-friendly tillage can be popularized as a restoration technology of slightly and moderately degraded grassland.