文献类型：期刊文献

中文题名：紫花苜蓿与无芒雀麦不同栽培模式下土壤团聚体形态结构、组成及有机碳特征

英文题名：Morphological structure, composition, and organic carbon characteristics of soil agglomerations for alfalfa and ryegrass planting patterns

作者：张家洋[1];蔺芳[1];詹乃才[1];任敏[1]

第一作者：张家洋

机构：[1]新乡学院生命科学技术学院

第一机构：新乡学院生命科学技术学院

年份：2019

卷号：36

期号：6

起止页码：1077-1086

中文期刊名：浙江农林大学学报

外文期刊名：Journal of Zhejiang A & F University

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：河南省科技攻关项目（172102110192,162102110028）

语种：中文

中文关键词：土壤学;栽培模式;土壤团聚体;有机碳;分形维数;相关性

外文关键词：soil science;planting pattern;soil aggregates;organic carbon;fractal dimension;correlation analysis

摘要：通过豫北地区6 a定位试验,以撂荒地为对照,研究了紫花苜蓿Medicago sativa单播、无芒雀麦Bromus inermis单播、紫花苜蓿/无芒雀麦混播3种不同的栽培模式对土壤团聚体组成与有机碳垂直分布的影响,并探讨了两者的相互关系。结果表明:人工草地建植后,土壤团聚体形态结构改善较为明显;土壤机械稳定性团聚体组成以5.00~3.00和3.00~2.00 mm粒径为主(比例为35.55%~57.12%);土壤水稳性团聚体组成以<0.25 mm和3.00~1.00 mm为主(比例为53.47%~74.47%);无论机械稳定性团聚体还是水稳性团聚体,不同栽培模式下土壤团聚体质量分形维数的大小顺序依次为撂荒地、无芒雀麦单播、紫花苜蓿单播、紫花苜蓿/无芒雀麦混播;土壤总有机碳、活性有机碳和腐殖质碳质量分数均随土层的增加而降低,各栽培模式下0~40 cm土壤有机碳质量分数从大到小依次为紫花苜蓿/无芒雀麦混播、紫花苜蓿单播、无芒雀麦单播、撂荒地;Pearson双侧检验结果显示:总有机碳、活性有机碳以及腐殖质碳质量分数两两之间均具有极显著的相关性(P<0.01)。机械稳定性和水稳性团聚体的分形维数值均与小粒径团聚体(<0.25 mm)呈极显著正相关(P<0.01)。结论:相对于撂荒地,人工建植草地后能够显著改变土壤团聚体的分布,促进土壤固碳,其中又以紫花苜蓿/无芒雀麦混播为最佳栽培模式。
Through consecutive location tests in northern Henan Province over 6 years and compared with a waste land,the effects of different planting patterns for alfalfa(Medicago sativa)and ryegrass(Bromus inermis)on the composition of soil aggregate structure and vertical distribution of organic carbon were studied using a correlation analysis.The relationship between the two was also discussed.Results showed that morphological structure of the soil aggregates changed after an artificial grassland was planted.Soil dry-sieving aggregates consisted mainly of 2.00-3.00 mm and 3.00-5.00 mm particle sizes(proportion:35.55%-57.12%);whereas,soil water-stable aggregates were composed of particles<0.25 mm and 1.00-3.00 mm in size(proportion:53.47%-74.47%).The order of fractal dimensions for both dry-sieving aggregates and water-stable aggregates was wasteland>ryegrass single-sowing>alfalfa single-sowing>alfalfa/ryegrass mixed-sowing.Total organic carbon content,soil active organic carbon,and humus carbon decreased with an increase of soil depth,and organic carbon content in the 0-40 cm soil layer was alfalfa/ryegrass mixed-sowing>alfalfa single-sowing>ryegrass single-sowing>wasteland.Also,a two-sided test for pears showed a highly significant correlation(P<0.01)to total organic carbon and active organic carbon(r=0.975),active organic carbon and humus carbon(r=0.975),and total organic carbon and humus carbon(r=0.954);and fractal dimension values were highly significant(P<0.01)and positively correlated to small-particle size aggregates(<0.25 mm)for both dry-sieving aggregates(r=0.972)and water-stable aggregates(r=0.980).In conclusion,compared to wasteland,the distribution of soil aggregates was greatly changed and soil carbon sequestration was promoted after artificial grassland was planted with alfalfa/ryegrass mixed-sowing being the best planting pattern.