摘要
[目的]筛选适宜的牧草品种和优良的混播类型,为退化草地的生态恢复提供科学依据.[方法]在祁连山北麓温性荒漠草原开展了无芒隐子草(Cleistogenes songorica)、驼绒黎(Krascheninnikovia ceratoides)、沙蒿(Artemisia desertorum)、沙米(Agriophyllum squarro-sum)、梭梭(Haloxylon ammodendron)、绢蒿(Seriphidium nitrosum)、木地肤(Kochia prostrata)、霸王(Sarcozygium xanthoxylon)和草木樨(Melilotus suaveolens)共9个品种的补播及混播适应性研究,调查记录了各品种及不同品种混播组合的生长高度、覆盖度、产草量等指标.[结果]无芒隐子草、沙蒿、沙米的生长发育表现优于其他品种,草产量较高,分别为6880.5、5329.5、5259.0 kg/hm2,具有较强的区域适应性.沙米+驼绒黎+无芒隐子草+草木樨的混播组合和无芒隐子草+沙蒿+驼绒黎+绢蒿的混播组合可以显著提高草产量,是退化荒漠草地恢复的最佳混播类型.[结论]无芒隐子草、沙蒿、沙米的适应性好、产量较高,可以作为荒漠草原改良的适宜草种.
Abstract
[Objective]In order to screen out the most suitable forage species and the best mixed sowing type,to provide scientific basis for ec-ological restoration of degraded grassland.[Method]The adaptability research of reseeding and mixed sowing of the 9 species of Cleistogenes songorica,Krascheninnikovia ceratoides,Artemisia desertorum,Agriophyllum squarrosum,Haloxylon ammodendron,Seriphidium nitrosum,Kochia prostrata,Sarcozygium xanthoxylon and Melilotus suaveolens in the temperate desert steppe at the northern foot of Qilian Mountains was conduc-ted.The indexes of growth height,coverage and yield of different varieties and different mixed sowing combinations were investigated and recor-ded.[Result]The results showed that:the growth and development performance of Cleistogenes songorica,Artemisia desertorum and Agriophyllum squarrosum were better than other varieties,and the grass yield was higher,were 6680.5,5329.5 and 5259.0 kg/hm2 ,respectively,with strong regional adaptability.Agriophyllum squarrosum + Krascheninnikovia ceratoides + Cleistogenes songorica + Melilotus suaveolens mixture and Cleis-togenes songorica+Artemisia desertorum + Krascheninnikovia ceratoides+ Seriphidium nitrosum mixture,could significantly increase the yield of grassland,and were the best type of mixed sowing for the restoration in degraded desert grassland.[Conclusion]The adaptability and yield of the Cleistogenes songorica,Artemisia desertorum and Agriophyllum squarrosum were good,so they could be used as the suitable grass species for des-ert steppe improvement.
维普
万方数据