生长季平茬对梁地柠条林间植被群落多样性的影响  

The Effect of Stubble in the Growing Season on the Vegetation Community Diversity of Caragana korshinskii Forest

作　　者：李浩霞 温学飞 田英 Li Haoxia;Wen Xuefei;Tian Ying(Institute of Forestry and Grassland Ecosystem,Ningxia Academy of Agriculture and Forestry Sciences/Ningxia Key Laboratory of Desertification Control and Soil and Water Conservation,Yinchuan,Ningxia 750002)

机构地区：[1]宁夏农林科学院荒漠化治理研究所/宁夏防沙治沙与水土保持重点实验室,宁夏银川750002

出　　处：《宁夏农林科技》2022年第2期11-15,41,共6页Journal of Ningxia Agriculture and Forestry Science and Technology

基　　金：宁夏农业科技自主创新专项“柠条生物发酵饲料加工关键技术研究”(NKYG-19-02);宁夏自然基金项目“柠条林土壤酶化学计量特征与土壤植物碳氮磷元素的相应关系研究”(2022AAC03424)。

摘　　要：为了研究生长季不同月份平茬对梁地柠条林间植被群落多样性的影响,2017年4—8月每月中旬对柠条林采用隔带平茬方式进行齐地平茬,2018年4—8月对不同月份平茬处理的柠条林间植被群落组成和植被特征进行调查。结果表明:柠条林植被群落以多年生草本植物为主,占68%以上;一年生草本植物的重要值、频度、盖度等均较高,其中狗娃花、蒺藜、狗尾草、虫实等占地上部总生物量的比例较大;6月份平茬处理第2年柠条林间植被的地上部总生物量、重要值、密度、频度等的指标均较高,反映了植被生长较好,生长量较大。从多个植被群落组成和多样性指标来看,柠条生长季不同月份平茬处理对柠条林间植被恢复影响不大,物种组成之间基本相似,说明柠条在生长季各月均可平茬;7月份平茬处理的柠条林间植被丰富度指数、优势度指数、多样性指数、均匀度指数均较高,反映了7月平茬处理柠条林间植被最丰富,建议平茬时间以7月份为最佳。In order to study the effect of stubble in different months of the growing season on the diversity of vegetation communities in Caragana korshinskii forests,from April to August 2017,the stubble forests were evenly stubble,and the stubble method was flat stubble.From April to August 2018,the composition and vegetation characteristics of the forest vegetation community of Caragana korshinskii growing and recovering in different months of 2017 were investigated.The results showed that the vegetation community is dominated by perennial herbaceous plants,accounting for more than 68%.The importance,frequency,and coverage of annual herbaceous plants are all high.The larger proportion of the total biomass on the ground is annual herbage dog baby flower,terrestris,setaria,wormwood,etc.,indicating that the proportion of annual plants in the Caragana korshinskii forest is still Larger;from the above-ground biomass,important value,density,frequency and other indicators,the above indicators of Caragana korshinskii forest vegetation in the second year after the stubble in June are all higher,reflecting the better growth of the vegetation and the amount of growth Larger.From the perspective of multiple vegetation community composition and diversity indicators,the average cropping in different months of the growing season has little effect on the vegetation restoration of Caragana korshinskii forest,and the species composition is basically similar.It shows that the Caragana korshinskii can be stubble every month in the growing season;from the richness index Ma,dominance index Si,diversity index H',uniformity index J and other indicators,the above indicators of Caragana korshinskii forest vegetation treated with flat stubble in July are all higher,reflecting the previous After the stubble in July of the year,the vegetation in the forest is the most abundant in July of the next year.Therefore,it is recommended that the stubble time is in July as the best.

关 键 词：生长季 柠条林 平茬 植被 群落多样性 

分 类 号：S793.3[农业科学—林木遗传育种]