摘要
为探究飞播30年后花棒、沙拐枣2种植物对结皮土壤颗粒组成和有机质的影响及其差异,明确植物生长过程中结皮土壤颗粒组成和有机质之间的关系,以腾格里沙漠东北缘飞播造林区为研究区,花棒、沙拐枣植株下结皮为研究对象,以无植物结皮为对照(CK),分析不同植株大小对不同位置结皮土壤颗粒组成和有机质含量的影响。结果表明,花棒、沙拐枣下结皮相较于CK细砂含量高、粗砂含量低;植株大小相同时,沙拐枣下结皮对细砂累积效应更明显。随着植株变大、距根部越近,结皮对细砂的保持效果越强。花棒、沙拐枣下结皮有机质含量均高于CK,且与植株大小呈正相关,花棒的结皮有机质含量整体高于沙拐枣。植株大小相同时,距根部0.5 m处的结皮有机质含量高于1.0 m处。2种植株的结皮有机质含量与细颗粒含量呈显著正相关,与粗颗粒含量呈极显著负相关。极细砂和极粗砂是二者结皮有机质积累与否的关键粒级。综上,在腾格里沙漠地区飞播30年后花棒对当地结皮有机质的积累效果更好,沙拐枣对结皮中细砂的保持效果更好。以上研究结果为干旱飞播区荒漠风蚀防治和恢复以及飞播选种配比提供理论基础和科学依据。
In order to explore the effects and differences of 2 plants of Hedysarum scoparium and Calligonum mongolicum on crust soil particle composition and organic matter after 30 years of aerial seeding,and to clarify the relationship between crust soil particle composition and organic matter during plant growth,the aerial seeding afforestation area in the northeastern margin of the Tengger desert was taken as the research area,and the lower crust of Hedysarum scoparium and Calligonum mongolicum was taken as the research object,and the non-plant crust was taken as the control(CK).The effects of different plant sizes on the particle composition and organic matter content of crust soil at different positions were analyzed.The results showed that the fine sand content of Hedysarum scoparium and Calligonum mongolicum was higher than that of CK,and the coarse sand content was lower.When the plant size was the same,the accumulation effect of fine sand under the crust of Calligonum mongolicum was more obvious.As the plant became larger and closer to the root,the effect of crusts on fine sand retention was stronger.The content of organic matter in the crusts of Hedysarum scoparium and Calligonum mongolicum was higher than that of CK,and was positively correlated with plant size.The content of organic matter in the crusts of Hedysarum scoparium was higher than that of Calligonum mongolicum.When the plant size was the same,the organic matter content of the crust at 0.5 m from the root was higher than that at 1.0 m.The content of crust organic matter in the 2 plants was significantly positively correlated with the content of fine particles,and was significantly negatively correlated with the content of coarse particles.Very fine sand and very coarse sand were the key fractions for the accumulation of crust organic matter.To sum up,after 30 years of aerial seeding in Tengger desert,Hedysarum scoparium had a better effect on the accumulation of organic matter in local crusts,and Calligonum mongolicum had a better effect on the maintenance of fine sand in crusts.Above results provided theoretical basis and scientific basis for the prevention and restoration of desert wind erosion and the selection ratio of aerial seeding in arid aerial seeding area.
作者
张然
高永
梁钰镁
党晓宏
高苗苗
刘宏义
高雪琴
ZHANG Ran;GAO Yong;LIANG Yumei;DANG Xiaohong;GAO Miaomiao;LIU Hongyi;GAO Xueqin(School of Desert Management,Inner Mongolia Agricultural University,Hohhot 010018,China;Baotou Forestry and Grassland Bureau,Inner Mongolia Baotou 014030,China;Alxa Zuoqi Forestry Workstation,Inner Mongolia Alxa 750300,China)
出处
《中国农业科技导报(中英文)》
北大核心
2025年第7期172-181,共10页
Journal of Agricultural Science and Technology
基金
国家重点研发计划青年科学家项目(SQ2022YFC3200066-03)
阿拉善左旗科学技术和林业草原局项目(2019-001)。
关键词
土壤结皮
粒度特征
有机质
飞播造林
腾格里沙漠
soil crust
granularity characteristics
organic matter
aerial seeding afforestation
Tengger desert
作者简介
张然,E-mail:1327466705@qq.com;通信作者:高永,E-mail:13948815709@163.com。
