刈割频率对天然羊草草原羊草叶钙、铁、锌及氨基酸含量的影响  

Effects of different mowing frequencies on the contents of Calcium,Ferrite,Zinc and amino acid in leaves of Leymus chinensis in natural grassland

作　　者：闫春霞 赵曼 宝音陶格涛 赵一安 祁智[1] YAN Chunxia;ZHAO Man;Baoyintaogetao;ZHAO Yian;QI Zhi(College of Life Sciences,Inner Mongolia University/Ministry of Education Key Laboratory of Forage and Endemic Crop Biotechnology,Hohhot 010010,China;College of Ecology and Environment,Inner Mongolia University,Hohhot 010010,China;Zhangjiakou Rural Cooperative Economy Management Station,Zhangjiakou 075000,China)

机构地区：[1]内蒙古大学生命科学学院/牧草与特色作物生物学教育部重点实验室,内蒙古呼和浩特010010 [2]内蒙古大学生态与环境学院,内蒙古呼和浩特010010 [3]张家口市农村合作经济经营管理站,河北张家口075000

出　　处：《北方农业学报》2022年第2期86-93,共8页Journal of Northern Agriculture

基　　金：国家自然科学基金面上项目(31870228);内蒙古自治区科技重大专项项目(zdzx2018016)。

摘　　要：【目的】明确不同刈割频率对天然羊草草原羊草叶中Ca、Fe、Zn及氨基酸含量的影响,以探索更加科学合理的刈割方式。【方法】试验采用随机区组设计,连续19年对样地羊草进行不同频率的刈割,集中采样后对羊草叶中Ca、Fe、Zn及14种氨基酸的含量进行测定。【结果】与不刈割相比,刈割2年休1年、1年刈割1次、1年刈割2次羊草叶的Ca含量分别提高了13.6%、21.8%、11.8%,且差异显著(P<0.05);不刈割及不同刈割频率间羊草叶的Fe、Zn含量均差异不显著(P>0.05);与不刈割相比,刈割1年休1年、刈割2年休1年、1年刈割1次的羊草叶中14种氨基酸总量分别提高了30.95%、40.19%、33.76%,且差异显著(P<0.05)。在不同刈割频率下,羊草叶的Ca含量以1年刈割1次最高,刈割2年休1年次之;14种氨基酸总量以刈割2年休1年最高,1年刈割1次次之。【结论】1年刈割1次和刈割2年休1年是提高天然羊草草原羊草品质较为科学合理的刈割方式。【Objective】To evaluate the effects of different mowing frequencies on the contents of Ca,Fe,Zn and amino acids in Leymus chinensis leaves in natural grassland.And to find a more scientific and reasonable mowing method.【Methods】The experiment was carried out in a random block design.The levels of Ca,Fe,Zn,and 14 amino acids in Leymus.chinensis leaves were measured during the course of 19 years of mowing at various frequency.【Results】Ca content in Leymus chinensis leaves mowed every two years and rested for a year,once a year,and twice a year increased by 13.6%,21.8%,and 11.8%,respectively,when compared to no mowing.The difference was statistically significant(P<0.05).Without mowing and mowed at varied frequency,there was no significant difference(P>0.05)in Fe and Zn concentration in Leymus chinensis leaves.The total amount of 14 amino acids increased by 30.95%,40.19%and 33.76%in Leymus chinensis leaves mowed one year and rest for a year,mowed every two years and rest for a year,and mowed once a year,with satistically significant(P<0.05)differences compared with no mowing.Under different mowing frequencies,the content of Ca in Leymus chinensis leaves was the highest when mowed once a year,followed by mowing every two years and rest for a year.The total amount of the 14 amino acids was highest in mowing every two years and rest for a year,followed by mowing every year.【Conclusion】Mowing once a year and mowing every two years and resting one year were scientific and reasonable approaches for improving Leymus chinensis grassland quality.

关 键 词：天然羊草草原 刈割频率 钙 铁 锌 氨基酸 

分 类 号：S688.4[农业科学—观赏园艺]