引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 190次   下载 103 本文二维码信息
码上扫一扫!
分享到: 微信 更多
毛乌素沙地砒砂岩改良风沙土后土壤质量的演变
张海欧1,2,3,4, 王健1,2,3, 孙小梅1,2,3
1.陕西省土地工程建设集团有限责任公司, 陕西 西安 710075;2.陕西地建土地工程技术研究院有限责任公司, 陕西 西安 710021;3.自然资源部退化及未利用土地整治工程重点实验室, 陕西 西安 710021;4.陕西省土地整治工程技术研究中心, 陕西 西安 710075
摘要:
[目的] 研究毛乌素沙地砒砂岩与沙复配土壤长期作物种植后质量的演变,旨在为了解复配土壤结构发育状况及可持续利用提供科学依据。[方法] 基于2010—2018年对砒砂岩与沙体积比为1:1,1:2,1:5复配土壤的田间小区试验,主要分析不同种植年限下复配土壤水稳性团聚体、有机质含量及作物产量的动态变化特征。[结果] 随着试验开展,3种比例复配土壤>0.25 mm粒径水稳性团聚体含量、平均重量直径(MWD)值和有机质含量整体呈增加趋势,与种植前相比,种植9 a后,1:1,1:2,1:5比例复配土壤>0.25 mm粒径水稳性团聚体分别增加了2.71,3.31和4.24倍,成为团聚体的主要组成部分;1:1,1:2,1:5比例复配土壤有机质含量分别提高了8.24,10.62和13.76倍。2011年不同比例复配土壤马铃薯产量大小顺序为:1:2>1:1>1:5,种植8年后1:1,1:2,1:5比例复配土壤马铃薯产量分别增加了3.27,4.25和6.96倍,产量大小顺序为:1:5>1:2>1:1,其中1:5复配土壤马铃薯产量提升速率最显著,多年平均产量高达53 850 kg/hm2,与当地高产田产量持平。[结论] 随着马铃薯种植年限的增加,3种比例复配土壤理化性状得到改良,复配土壤结构得到日益优化,尤其是能有效促进1:5复配土壤有机化和水稳性团聚体的形成,并且马铃薯增产的效果最优。因此1:5复配比例适宜马铃薯生长。
关键词:  砒砂岩  风沙土  团聚体稳定性  有机质  土壤质量演变  毛乌素沙地
DOI:10.13961/j.cnki.stbctb.2021.04.005
分类号:S152.4;S153.6
基金项目:陕西省土地工程建设集团内部科研项目“基于高通量测序的砒砂岩与沙复配土土壤微生物群落结构多样性研究”(DJNY2020-13);陕西省土地工程建设集团内部科研项目(DJNY2020-14);陕西省土地整治重点实验室开放项目(2018-JC18;2019-JC07)
Quality Evolution After Aeolian Sandy Soil Improved by Feldpathic Sandstone in Mu Us Sandy Land
Zhang Haiou1,2,3,4, Wang Jian1,2,3, Sun Xiaomei1,2,3
1.Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi 710075, China;2.Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, Shaanxi 710021, China;3.Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi'an, Shaanxi 710021, China;4.Shaanxi Provincial Land Consolidation Engineering Technology Research Center, Xi'an, Shaanxi 710075, China
Abstract:
[Objective] The compound soil of Feldpathic Sandstone and sand in Mu Us Sandy Land belongs to artificial reconstructed soil. The quality evolution of the compound soil after long-term crop planting was studied, in order to provide scientific basis for understanding the structure development and sustainable utilization of the compound soil. [Methods] Based on the field plot experiments of compound soil a with volume ratios of 1:1, 1:2 and 1:5 of Feldpathic Sandstone to sand during the period from 2010 to 2018, the dynamic change characteristics of water-stable aggregates, organic matter content and crop yield in the compound soils under different planting years were analyzed. [Results] With the development of the experiment, the content of water-stable aggregates with diameter>0.25 mm, average weight diameter (MWD) value and organic matter content in the three proportions of compound soils showed an overall increasing trend. After 9 years of planting, water-stable aggregates >0.25 mm in 1:1, 1:2 and 1:5 compound soil increased by 2.71, 3.31 and 4.24 times, respectively, and became the main component of aggregates. The soil organic matter content increased by 8.24, 10.62 and 13.76 times, respectively. In 2011, the potato yield order in different proportion of compound soil was showed as: 1:2 > 1:1 > 1:5, after 8 years of planting, the potato yield increased by 3.27, 4.25 and 6.96 times, respectively, and the yield order was 1:5 > 1:2 > 1:1. Among them, the potato yield in the 1:5 compound soil increased most significantly. The average yield for many years was as high as 53 850 kg/ha, which was equal to the yield of local high-yield fields. [Conclusion] With the increase of potato planting years, the physical and chemical properties of the three-proportion compound soil have been improved, and the compound soil structure has been increasingly optimized. In particular, it can effectively promote the formation of 1:5 compound soil organic and water stable aggregates, and the effect of potato yield increase is the best, so the ratio of 1:5 compound soil is suitable for potato growth.
Key words:  feldpathic sandstone  aeolian sandy soil  aggregate stability  organic matter  soil quality evolution  Mu Us Sand Land