文献类型：期刊文献

中文题名：人工草地种植模式对沙化土壤团聚体及有机质含量的影响

英文题名：Effects of Planting Patterns on Soil Aggregates and Organic Matter Characteristics of Sandy Soil

作者：蔺芳[1,2];刘晓静[1];张家洋[2]

第一作者：蔺芳

机构：[1]甘肃农业大学草业学院;[2]新乡学院生命科学技术学院

第一机构：甘肃农业大学草业学院,甘肃兰州730070

年份：2018

卷号：38

期号：6

起止页码：1219-1229

中文期刊名：中国沙漠

外文期刊名：Journal of Desert Research

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD2017_2018】；

基金：公益性行业(农业)科研专项(201403048-8);国家自然科学基金项目(31460622);甘肃农业大学科技创新基金(学科建设专项基金)项目(GSAU-XKJS-2018-008);河南省科技攻关项目(172102110192;162102110028)

语种：中文

中文关键词：人工草地;种植模式;沙化土壤;团聚体;有机碳

外文关键词：artificial grassland;planting patterns;sandy soil;aggregates;organic carbon

摘要：通过连续6年定位试验,研究了紫花苜蓿(Medicago sativa)单播、多年生黑麦草(Lolium perenne)单播、紫花苜蓿/多年生黑麦草混播3种种植模式对豫北地区土壤团聚体及其有机碳和土壤有机质的影响,并利用分形维数对土壤团聚体特性进行了量化研究。结果表明:沙化裸地和3种种植模式下土壤机械稳定性团聚体以5~3 mm和3~2 mm粒径为主,土壤水稳性团聚体以<0.25 mm粒径为主;与沙化裸地相比,3种种植模式下5~3 mm和3~2 mm粒径土壤机械稳定性团聚体含量显著增加,而土壤水稳性团聚体的变化主要表现为<0.25 mm粒径显著减少,3~2 mm和2~0.5 mm粒径显著增加,同时≥2 mm粒径的土壤机械稳定性和水稳性团聚体有机碳含量明显增加;与沙化裸地相比,3种种植模式下土壤有机质含量均不同程度地增加,紫花苜蓿/多年生黑麦草混播>紫花苜蓿单播>多年生黑麦草单播,且随土层的加深而降低,呈现表聚性特征;无论机械稳定性还是水稳性团聚体,土壤质量分形维数(Dm)沙化裸地>多年生黑麦草单播>紫花苜蓿单播>紫花苜蓿/多年生黑麦草混播; 5~3 mm和3~2 mm粒径的土壤机械稳定性和水稳性团聚体与有机碳含量极显著正相关(P<0.01),与土壤有机质含量极显著相关(P<0.01)。相对于沙化裸地,豫北地区人工草地建植6年后能够有效改善土壤团聚体特性,优化土壤主要理化性状,其中又以紫花苜蓿/多年生黑麦草混播为最佳的种植模式。
Through six consecutive years of positioning test in northern Henan province,compared with sandy bare land,the effect of three kinds of planting patterns (alfalfa single-sowing,perennial ryegrass single-sowing,alfalfa/perennial ryegrass mixed-sowing)on soil aggregates and its organic carbon and soil organic matter were studied,and the soil aggregates characteristics were quantified by fractal dimension.Results showed that the soil mechanical-stable aggregates were mainly composed of particles with sizes 5-3mm and 3-2mm under sandy bare land and three kinds of planting patterns,while the soft water-stable aggregates were mainly composed of particles with size <0.25mm;compared with sandy bare land,the content of mechanical-stable aggregates (5-3mm and 2-3mm)under three kinds of planting patterns were significantly increased,while the content of water-stable aggregates (<0.25mm)decreased significantly,and the content of water-stable aggregates (3-2mm and 2-0.5mm)increased significantly.At the same time,the organic carbon content of soil mechanical-stable and water-stable aggregates (≥2mm)increased obviously;compared with sandy bare land,the contents of soil organic matter under three kinds of planting patterns were incresed,the order was as follows:alfalfa/perennial ryegrass mixed-sowing>alfalfa single-sowing>perennial ryegrass single-sowing,and the contents decreased with the deepening of the soil layer,that is,surface aggregation features were presented;both soil mechanical-stable aggregates and water-stable aggregates,the order of fractal dimension (Din)was: sandy bare land>perennial ryegrass single-sowing>affalfa single-sowing>alfalfa/perennial ryegrass mixedsowing;Pearson bilateral test showed that it had significantly positive correlation between the content of mechanical-stable and water-stable aggregates (5-3mm and 3-2mm)and their organic carbon (P< 0.01),and it also showed significant correlation associated with soil organic matter (P<0.01).Conclusion:compared with sandy bare land,it showed that the soil aggregate characteristics and physiochemical properties of artificial planting grassland after six years were improved effectively in northern Henan province,which the alfalfa/perennial ryegrass mixed-sowing was the best planting pattern.